Process Economics Program

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1 IHS Chemical Process Economics Program Report 148C Synthesis Gas Production from Coal and Petroleum Coke Gasification By Jamie Lacson

2 IHS Chemical agrees to assign professionally qualified personnel to the preparation of the Process Economics Program s reports and will perform the work in conformance with generally accepted professional standards. No other warranties expressed or implied are made. Because the reports are of an advisory nature, neither IHS Chemical nor its employees will assume any liability for the special or consequential damages arising from the Client s use of the results contained in the reports. The Client agrees to indemnify, defend, and hold IHS Chemical, its officers, and employees harmless from any liability to any third party resulting directly or indirectly from the Client s use of the reports or other deliverables produced by IHS Chemical pursuant to this agreement. For detailed marketing data and information, the reader is referred to one of the IHS Chemical programs specializing in marketing research. THE IHS CHEMICAL ECONOMICS HANDBOOK Program covers most major chemicals and chemical products produced throughout the world. In addition the IHS DIRECTORY OF CHEMICAL PRODUCERS services provide detailed lists of chemical producers by company, product, and plant for the United States, Europe, East Asia, China, India, South & Central America, the Middle East & Africa, Canada, and Mexico. September IHS

3 PEP Report 148C Synthesis Gas Production from Coal and Petroleum Coke Gasification By Jamie Lacson September 2013 Abstract In regions with limited access to low-cost natural gas, coal gasification is becoming an important route to the manufacture of synthesis gas. Coal gasification technologies have advanced significantly in recent years, in terms of feed handling capacity and efficiency, particularly with the development of entrainedflow gasifiers. Coal gasification has been based, for the most part, on bituminous coals. Gasification of lower rank coals has been limited. However, the nature of the coal market and the abundance of lower grade coals naturally foster an interest in the use of lower grade coals such as subbituminous coal and lignite. In addition, refineries around the world are producing a large stockpile of petroleum coke that can be gasified to produce synthesis gas. Petroleum coke, limited by proximity to refineries, is an opportunity feedstock, which can sometimes be a lower cost fuel. This report will present syngas processes and economics modules for the utilization of the following solid feedstocks: Bituminous coal Subbituminous coal Lignite Petroleum coke The solid feedstocks are converted to synthesis gas via oxygen-blown entrained-flow gasifiers. The gasification technologies covered in this report include the following: GE Energy quench gasifier GE Energy radiant gasifier Shell Coal Gasification Process (SCGP) gasifier E-Gas gasifier (CB&I, formerly ConocoPhillips) Siemens Fuel Gasifier (SFG) The report is accompanied by a Microsoft Excel workbook (PEPSyngas ) containing syngas modules from gasification of coal and petroleum coke (PEP Report 148C) and natural gas reforming (PEP Report 148B) available to PEP clients. The workbook module contains a user interface (written by the author in Visual Basic for Applications 7.0). The output in each module will consist of stream flow, mass, energy balance, production costs, and capital costs for any combination of feedstock and gasification technology to produce synthesis gas of essentially any H 2/CO molar ratio at the capacity and operating conditions specified. This modular approach allows for immediate implementation of the syngas economics output of any module for downstream product needs, which can be used for assessing the competitiveness of new projects. The report also includes background technical information on the various feedstocks, gasifier technologies, and end-use applications of synthesis gas. September IHS

4 Contents Glossary... xxi 1. Introduction Capital cost estimate methodologies Process simulation methodologies Summary Background Coal market Features of syngas supply and use Supply aspects Demand aspects PEPSyngas features Gasifiers ROI and profitability Design bases and costs Synthesis gas process economics Gasification of coal by rank Industry status Energy prices Coal supply Petroleum coke Gasification capacity Gasification feedstock Technology review Feedstock Anthracite Bituminous coal Subbituminous coal Lignite Caloric value Grindability Moisture Ash Volatile matter Fixed carbon Feedstock preparation Coal water slurry Dry feeding Gasification Gasification chemistry Stoichiometric and thermal constraints September 2013 iii 2013 IHS

5 Contents (continued) Kinetics of gasification Gasifier reactor design Comparison of gasification technologies Entrained-flow gasifiers GE Energy Shell Coal Gasification Process (SCGP) E-Gas gasifier (CB&I, formerly ConocoPhillips) Siemens/SFG gasifier Selective comparison of gasification technologies Air separation NOx abatement Gas clean-up system Particulate removal Syngas scrubber/sour water stripper Wet scrubbing Sour water stripper Water gas shift High temperature shift Low temperature shift Sour gas shift Carbonyl sulfide hydrolysis Acid gas removal Chemical solvents Physical solvents Sulfur recovery Claus process SCOT process Mercury removal Synthesis gas for chemicals Ammonia Methanol Hydrogen Carbon monoxide Oxo-alcohols Synthetic fuels PEPSyngas module Features and limitations Features of PEPSyngas ROI and profitability Definitions September 2013 iv 2013 IHS

6 Contents (continued) Design bases Gasification and reforming selection (step 1) Gasification (step 2) Gasifier technology Gasifier feedstock Operating conditions Operating temperature Operating pressure Natural gas reforming (step 2) Reforming technology Syngas end product Synthesis gas composition (step 3) H 2/CO molar ratio CO 2 composition Syngas production rate Regional selections (optional step 4) Economics (optional step 5) Results Stream table Utilities summary Capital cost Variable cost Production cost Synthesis gas for methanol from bituminous coal via gasification Methanol syngas specifications Main reactions Plant configuration Oxygen supply Feedstock preparation Syngas cooling and heat recovery Particulate removal Water gas shift/carbonyl hydrolysis Mercury removal Acid gas removal Sulfur recovery and tail gas treating Synthesis gas (SR = 2.036) by GE quench gasification Process description Section 100 air separation Section 200 gasification Section 300 gas clean-up September 2013 v 2013 IHS

7 Contents (continued) Water gas shift Gas cooling Mercury removal Acid gas removal Sulfur plant Investment costs Production costs Synthesis gas (SR = 2.036) by GE radiant gasification Process description Section 100 air separation Section 200 gasification Section 300 gas clean-up Water gas shift Gas cooling Mercury removal Acid gas removal Sulfur plant Investment costs Production costs Synthesis gas (SR = 2.036) by Shell gasification Process description Section 100 air separation Section 200 gasification Section 300 gas clean-up Water gas shift Gas cooling Mercury removal Acid gas removal Sulfur plant Investment costs Production costs Synthesis gas (SR = 2.036) by E-Gas gasification Process description Section 100 air separation Section 200 gasification Section 300 gas clean-up Water gas shift Gas cooling Mercury removal Acid gas removal September 2013 vi 2013 IHS

8 Contents (continued) Sulfur plant Investment costs Production costs Synthesis gas (SR = 2.036) by Siemens SFG gasification Process description Section 100 air separation Section 200 gasification Section 300 gas clean-up Water gas shift Gas cooling Mercury removal Acid gas removal Sulfur plant Investment costs Production costs Process discussion GE Energy Shell E-Gas Siemens By-products Heat recovery and shift steam requirement Synthesis gas for hydrogen from subbituminous coal via gasification Synthesis gas (96% CO shift) by GE quench gasification Process description Section 100 air separation Section 200 gasification Section 300 gas clean-up Water gas shift Gas cooling Mercury removal Acid gas removal Sulfur plant Investment costs Production costs Synthesis gas (96% CO shift) by GE radiant gasification Process description Section 100 air separation Section 200 gasification Section 300 gas clean-up September 2013 vii 2013 IHS

9 Contents (continued) Water gas shift Gas cooling Mercury removal Acid gas removal Sulfur plant Investment costs Production costs Synthesis gas (96% CO shift) by Shell gasification Process description Section 100 air separation Section 200 gasification Section 300 gas clean-up Water gas shift Gas cooling Mercury removal Acid gas removal Sulfur plant Investment costs Production costs Synthesis gas (96% CO shift) by E-Gas gasification Process description Section 100 air separation Section 200 gasification Section 300 gas clean-up Water gas shift Gas cooling Mercury removal Acid gas removal Sulfur plant Investment costs Production costs Synthesis gas (96% CO shift) by Siemens SFG gasification Process description Section 100 air separation Section 200 gasification Section 300 gas clean-up Water gas shift Gas cooling Mercury removal Acid gas removal September 2013 viii 2013 IHS

10 Contents (continued) Sulfur plant Investment costs Production costs Process discussion Synthesis gas for Fischer-Tropsch synthesis from petroleum coke via gasification Synthesis gas (H 2/CO = 2.1) by GE quench gasification Process description Section 200 gasification Section 300 gas clean-up Water gas shift Gas cooling Mercury removal Acid gas removal Sulfur plant Investment costs Production costs Synthesis gas (H 2/CO = 2.1) by GE radiant gasification Process description Section 100 air separation Section 200 gasification Section 300 gas clean-up Water gas shift Gas cooling Mercury removal Acid gas removal Sulfur plant Investment costs Production costs Synthesis gas (H 2/CO = 2.1) by Shell gasification Process description Section 100 air separation Section 200 gasification Section 300 gas clean-up Water gas shift Gas cooling Mercury removal Acid gas removal Sulfur plant Investment costs Production costs September 2013 ix 2013 IHS

11 Contents (continued) Synthesis gas (H 2/CO = 2.1) by E-Gas gasification Process description Section 100 air separation Section 200 gasification Section 300 gas clean-up Water gas shift Gas cooling Mercury removal Acid gas removal Sulfur plant Investment costs Production costs Synthesis gas (H 2/CO = 2.1) by Siemens SFG gasification Process description Section 100 air separation Section 200 gasification Section 300 gas clean-up Water gas shift Gas cooling Mercury removal Acid gas removal Sulfur plant Investment costs Production costs Process discussion H 2/CO ratio and CO content Methane content Coal rank and gasification Coal properties and gasifiers Calorific value Moisture Ash Grindability Results GE coal characteristics Shell coal characteristics E-Gas coal characteristics Siemens coal characteristics Lower rank coal Appendix A: Feedstock analysis... A-1 September 2013 x 2013 IHS

12 Contents (concluded) Appendix B: Patent summary tables... B-1 Appendix C: Design and cost bases... C-1 Appendix D: Cited references... D-1 Appendix E: Process flow diagrams... E-1 September 2013 xi 2013 IHS

13 Figures 2.1 Syngas capacity and fossil fuel prices PEP reports and reviews on synthesis gas sources and applications GE gasifier raw syngas production and H 2/CO molar ratio Shell gasifier raw syngas production and H 2/CO molar ratio E-Gas gasifier raw syngas production and H 2/CO molar ratio Siemens gasifier raw syngas production and H 2/CO molar ratio Primary energy sources US energy prices US coal prices US primary energy production World coal reserves Coal production by region World coal production Refinery operations block diagram World gasification capacity by feed type World gasification capacity by product type Selected gasifier capacity Selected gasifier installations by region Selected gasifier capacity by region Gasifier technology by feedstock group Gasifier technology by product type Synthesis gas production Coalification process Conversion in years Carbon and moisture content of coal Approximate analysis Gross calorific value limits Gasifier flow Gasifier feed Entrained-flow gasifier schematic GE quench gasifier GE radiant gasifier Shell gasifier with syngas cooler E-Gas gasifier Siemens SFG gasifier Water gas shift with saturate/desaturate configuration COS hydrolysis Selexol process scheme Three-stage Claus diagram Typical SCOT tail gas treatment plant September 2013 xii 2013 IHS

14 Figures (continued) 5.1 PEP reports and reviews on synthesis gas applications PEPSyngas user input parameters PEPSyngas gasifier selection PEPSyngas feedstock selection Proximate analysis Effect of gasifier temperature on contained syngas and steam Effect of gasifier temperature on contained syngas quench water Natural gas reforming technology selection Natural gas reforming end product selection Product syngas customization Region selection Variable costs customization Process economics customization GE quench gasifier block flow diagram GE radiant gasifier block flow diagram Shell gasifier block flow diagram E-Gas gasifier block flow diagram Siemens SFG gasifier block flow diagram Synthesis gas from steam methane reforming for hydrogen (Uhde) block flow diagram Synthesis gas from steam methane reforming for hydrogen (Praxair) block flow diagram Synthesis gas from steam methane reforming for methanol (Toyo) block flow diagram Synthesis gas from combined reforming for methanol (Lurgi) block flow diagram Synthesis gas from combined reforming for methanol (HT) block flow diagram Synthesis gas from combined reforming for methanol (JM) block flow diagram Synthesis gas from autothermal reforming for Fischer Tropsch (HT) block flow diagram Synthesis gas from partial oxidation reforming for Fischer Tropsch (Shell) block flow diagram Synthesis gas by GE quench gasification process flow diagram... E Synthesis gas by GE radiant gasification process flow diagram... E Synthesis gas by Shell gasification process flow diagram... E Synthesis gas by E-Gas gasification process flow diagram... E Synthesis gas by Siemens SFG gasification process flow diagram... E Bituminous coal raw syngas composition Subbituminous coal raw syngas composition Lignite A raw syngas composition Petroleum coke raw syngas composition Coal rank: Low Volatile Bituminous Coal Seam (mine)/region: Pocahontas No Coal rank: Medium Volatile Bituminous Coal Seam (mine)/region: Upper Freeport September 2013 xiii 2013 IHS

15 Figures (concluded) 10.3 Coal rank: High Volatile A Bituminous Coal Seam (mine)/region: Pittsburgh No Coal rank: High Volatile B Bituminous Coal Seam (mine)/region: Hunter Valley/New South Wales Coal rank: High Volatile B Bituminous Coal Seam (mine)/region: Jinbei/Shanxi Coal rank: High Volatile B Bituminous Coal Seam (mine)/region: Arthur Taylor/South Africa Coal rank: High Volatile C Bituminous Coal Seam (mine)/region: Illinois No Coal rank: High Volatile C Bituminous Coal Seam (mine)/region: Dartbrook/New South Wales Coal rank: High Volatile C Bituminous Coal Seam (mine)/region: Wannian/Hebei Coal rank: Subbituminous Coal A Seam (mine)/region: Rihandnagar/Singrauli Coal rank: Subbituminous Coal B Seam (mine)/region: Rosebud/Montana Coal rank: Subbituminous Coal C Seam (mine)/region: Wyodak/Powder River Basin Coal rank: Lignite A Seam (mine)/region: Texas Lignite Coal rank: Lignite B Seam (Mine)/Region: High Na Lignite/North Dakota Fuel rank: Coke Seam (mine)/region: Petroleum coke September 2013 xiv 2013 IHS

16 Tables 2.1 Design features of entrained-flow gasifiers Synthesis gas (stoichiometric ratio = 2.036) production costs for bituminous coal Synthesis gas (stoichiometric ratio = 2.036) production costs for subbituminous coal Synthesis gas (stoichiometric ratio = 2.036) production costs for lignite Synthesis gas (stoichiometric ratio = 2.036) production costs for petroleum coke Synthesis gas for hydrogen production costs for bituminous coal Synthesis gas for hydrogen production costs for subbituminous coal Synthesis gas for hydrogen production costs for lignite Synthesis gas for hydrogen production costs for petroleum coke Synthesis gas for Fischer-Tropsch fuel production costs for bituminous coal Synthesis gas for Fischer-Tropsch fuel production costs for subbituminous coal Synthesis gas for Fischer-Tropsch fuel production costs for lignite Synthesis gas for Fischer-Tropsch fuel production costs for petroleum coke Feedstock prices for US Gulf Coast World gasification plants Coal specific gravity Classification of anthracitic and bituminous coals by rank Gross calorific value limits Ash fusion temperatures Coal class Chemical reactions Typical raw syngas composition Advantages and limitations of gasifiers Gasification technologies Entrained-flow gasifier and feedstock Salient characteristics of major gasification technologies Typical syngas composition from coal-based E-Gas gasifier SFG coal gasification typical syngas composition Chemical solvents Physical solvents Mercury contents of coal Syngas molar ratio PEPSyngas terms Gasifier design bases GE Energy quench gasifier GE Energy radiant gasifier Shell gasifier E-Gas gasifier Siemens gasifier Gas clean-up section September 2013 xv 2013 IHS

17 Tables (continued) 6.8 Feedstock composition Typical syngas H 2/CO molar ratio Stoichiometric values Location-based factors and labor rate Stream descriptions Syngas for methanol synthesis Syngas impurities and tolerances in methanol synthesis Design specifications for gas clean-up systems Bituminous coal feedstock properties Synthesis gas (SR = 2.036) from bituminous coal by the GE quench gasifier Stream flows Synthesis gas (SR = 2.036) from bituminous coal by the GE quench gasifier Utilities summary Synthesis gas (SR = 2.036) from bituminous coal by the GE quench gasifier Capital investment Synthesis gas (SR = 2.036) from bituminous coal by the GE quench gasifier Variable costs Synthesis gas (SR = 2.036) from bituminous coal by the GE quench gasifier Production costs Synthesis gas (SR = 2.036) from bituminous coal by the GE radiant gasifier Stream flows Synthesis gas (SR = 2.036) from bituminous coal by the GE radiant gasifier Utilities summary Synthesis gas (SR = 2.036) from bituminous coal by the GE radiant gasifier Capital investment Synthesis gas (SR = 2.036) from bituminous coal by the GE radiant gasifier Variable costs Synthesis gas (SR = 2.036) from bituminous coal by the GE radiant gasifier Production costs Synthesis gas (SR = 2.036) from bituminous coal by the Shell gasifier Stream flows Synthesis gas (SR = 2.036) from bituminous coal by the Shell gasifier Utilities summary Synthesis gas (SR = 2.036) from bituminous coal by the Shell gasifier Capital investment Synthesis gas (SR = 2.036) from bituminous coal by the Shell gasifier Variable costs Synthesis gas (SR = 2.036) from bituminous coal by the Shell gasifier Production costs Synthesis gas (SR = 2.036) from bituminous coal by the E-Gas gasifier Stream flows Synthesis gas (SR = 2.036) from bituminous coal by the E-Gas gasifier Utilities summary September 2013 xvi 2013 IHS

18 Tables (continued) 7.22 Synthesis gas (SR = 2.036) from bituminous coal by the E-Gas gasifier Capital investment Synthesis gas (SR = 2.036) from bituminous coal by the E-Gas gasifier Variable costs Synthesis gas (SR = 2.036) from bituminous coal by the E-Gas gasifier Production costs Synthesis gas (SR = 2.036) from bituminous coal by the Siemens gasifier Stream flows Synthesis gas (SR = 2.036) from bituminous coal by the Siemens gasifier Utilities summary Synthesis gas (SR = 2.036) from bituminous coal by the Siemens gasifier Capital investment Synthesis gas (SR = 2.036) from bituminous coal by the Siemens gasifier Variable costs Synthesis gas (SR = 2.036) from bituminous coal by the Siemens gasifier Production costs Powder River Basin Wyodak feedstock properties Synthesis gas (~96% CO shift) from subbituminous coal by the GE quench gasifier Stream flows Synthesis gas (~96% CO shift) from subbituminous coal by the GE quench gasifier Utilities summary Synthesis gas (~96% CO shift) from subbituminous coal by the GE quench gasifier Capital investment Synthesis gas (~96% CO shift) from subbituminous coal by the GE quench gasifier Variable costs Synthesis gas (~96% CO shift) from subbituminous coal by the GE quench gasifier Production costs Synthesis gas (~96% CO shift) from subbituminous coal by the GE radiant gasifier Stream flows Synthesis gas (~96% CO shift) from subbituminous coal by the GE radiant gasifier Utilities summary Synthesis gas (~96% CO shift) from subbituminous coal by the GE radiant gasifier Capital investment Synthesis gas (~96% CO shift) from subbituminous coal by the GE radiant gasifier Variable costs Synthesis gas (~96% CO shift) from subbituminous coal by the GE radiant gasifier Production costs Synthesis gas (~96% CO shift) from subbituminous coal by the Shell gasifier Stream flows Synthesis gas (~96% CO shift) from subbituminous coal by the Shell gasifier Utilities summary Synthesis gas (~96% CO shift) from subbituminous coal by the Shell gasifier Capital investment September 2013 xvii 2013 IHS

19 Tables (continued) 8.15 Synthesis gas (~96% CO shift) from subbituminous coal by the Shell gasifier Variable costs Synthesis gas (~96% CO shift) from subbituminous coal by the Shell gasifier Production costs Synthesis gas (~96% CO shift) from subbituminous coal by the E-Gas gasifier Stream flows Synthesis gas (~96% CO shift) from subbituminous coal by the E-Gas gasifier Utilities summary Synthesis gas (~96% CO shift) from subbituminous coal by the E-Gas gasifier Capital investment Synthesis gas (~96% CO shift) from subbituminous coal by the E-Gas gasifier Variable costs Synthesis gas (~96% CO shift) from subbituminous coal by the E-Gas gasifier Production costs Synthesis gas (~96% CO shift) from subbituminous coal by the Siemens gasifier Stream flows Synthesis gas (~96% CO shift) from subbituminous coal by the Siemens gasifier Utilities summary Synthesis gas (~96% CO shift) from subbituminous coal by the Siemens gasifier Capital investment Synthesis gas (~96% CO shift) from subbituminous coal by the Siemens gasifier Variable costs Synthesis gas (~96% CO shift) from subbituminous coal by the Siemens gasifier Production costs Petroleum coke feedstock properties Synthesis gas (H 2/CO = 2.1) from petroleum coke by the GE quench gasifier Stream flows Synthesis gas (H 2/CO = 2.1) from petroleum coke by the GE quench gasifier Utilities summary Synthesis gas (H 2/CO = 2.1) from petroleum coke by the GE quench gasifier Capital investment Synthesis gas (H 2/CO = 2.1) from petroleum coke by the GE quench gasifier Variable costs Synthesis gas (H 2/CO = 2.1) from petroleum coke by the GE quench gasifier Production costs Synthesis gas (H 2/CO = 2.1) from petroleum coke by the GE radiant gasifier Stream flows Synthesis gas (H 2/CO = 2.1) from petroleum coke by the GE radiant gasifier Utilities summary Synthesis gas (H 2/CO = 2.1) from petroleum coke by the GE radiant gasifier Capital investment Synthesis gas (H 2/CO = 2.1) from petroleum coke by the GE radiant gasifier Variable costs September 2013 xviii 2013 IHS

20 Tables (continued) 9.11 Synthesis gas (H 2/CO = 2.1) from petroleum coke by the GE radiant gasifier Production costs Synthesis gas (H 2/CO = 2.1) from petroleum coke by the Shell gasifier Stream flows Synthesis gas (H 2/CO = 2.1) from petroleum coke by the Shell gasifier Utilities summary Synthesis gas (H 2/CO = 2.1) from petroleum coke by the Shell gasifier Capital investment Synthesis gas (H 2/CO = 2.1) from petroleum coke by the Shell gasifier Variable costs Synthesis gas (H 2/CO = 2.1) from petroleum coke by the Shell gasifier Production costs Synthesis gas (H 2/CO = 2.1) from petroleum coke by the E-Gas gasifier Stream flows Synthesis gas (H 2/CO = 2.1) from petroleum coke by the E-Gas gasifier Utilities summary Synthesis gas (H 2/CO = 2.1) from petroleum coke by the E-Gas gasifier Capital investment Synthesis gas (H 2/CO = 2.1) from petroleum coke by the E-Gas gasifier Variable costs Synthesis gas (H 2/CO = 2.1) from petroleum coke by the E-Gas gasifier Production costs Synthesis gas (H 2/CO = 2.1) from petroleum coke by the Siemens gasifier Stream flows Synthesis gas (H 2/CO = 2.1) from petroleum coke by the Siemens gasifier Utilities summary Synthesis gas (H 2/CO = 2.1) from petroleum coke by the Siemens gasifier Capital investment Synthesis gas (H 2/CO = 2.1) from petroleum coke by the Siemens gasifier Variable costs Synthesis gas (H 2/CO = 2.1) from petroleum coke by the Siemens gasifier Production costs Gasifier feedstock GE coal characteristics Shell coal characteristics E-Gas coal characteristics Siemens coal characteristics Coal rank: Low Volatile Bituminous Coal Seam (mine)/region: Pocahontas No Coal rank: Medium Volatile Bituminous Coal Seam (mine)/region: Upper Freeport Coal rank: High Volatile A Bituminous Coal Seam (mine)/region: Pittsburgh No September 2013 xix 2013 IHS

21 Tables (concluded) 10.9 Coal rank: High Volatile B Bituminous Coal Seam (mine)/region: Hunter Valley/New South Wales Coal rank: High Volatile B Bituminous Coal Seam (mine)/region: Jinbei/Shanxi Coal rank: High Volatile B Bituminous Coal Seam (mine)/region: Arthur Taylor/South Africa Coal rank: High Volatile C Bituminous Coal Seam (mine)/region: Illinois No Coal rank: High Volatile C Bituminous Coal Seam (mine)/region: Dartbrook/New South Wales Coal rank: High Volatile C Bituminous Coal Seam (mine)/region: Wannian/Hebei Coal rank: Subbituminous Coal A Seam (mine)/region: Rihandnagar/Singrauli Coal rank: Subbituminous Coal B Seam (mine)/region: Rosebud/Montana Coal rank: Subbituminous Coal C Seam (mine)/region: Wyodak/Powder River Basin Coal rank: Lignite A Seam (mine)/region: Texas Lignite Coal rank: Lignite B Seam (mine)/region: High Na Lignite/North Dakota Fuel rank: Coke Seam (mine)/region: Petroleum coke Illinois #6 vs. Wyoming PRB coal salt compositions of ash September 2013 xx 2013 IHS