Oxy-Coal CFB Demonstration Project

Transcription

1 Click to edit Master title style Oxy-Coal CFB Demonstration Project Minish Shah, Dante Bonaquist, Stewart Mehlman Praxair Loren Howard Holland (Michigan) Board of Public Works Horst Hack Foster Wheeler Joel Sminchak Battelle 1st Oxyfuel Combustion Conference Cottbus, Germany September 7 11, Making our planet more productive Copyright 2009 Praxair Technology, Inc. All rights reserved.

2 Project Overview 78 MWe (gross) integrated oxy-coal CFB project 44 MWe net output with CCS >600,000 tons/year CO 2 to be sequestered Test technologies optimized for commercial scale plant Impressive environmental performance Near zero emissions with ~99% CO 2 capture and >99% reduction in SOx/NOx/Hg/PM emissions compared to air-fired CFB With the inclusion of biomass, the plant has the opportunity for a negative carbon footprint Exceeds proposed long-term (2020) DOE Energy Policy Act goals Clean - no solvents needed Applicable to retrofits 2

3 Project Participants and Roles Holland Board of Public works Host site Praxair ASU and CPU (CO 2 processing unit) Foster Wheeler CFB Boiler Battelle Sequestration management Black and Veatch Project management and EPC DTE Energy Consultant, technical oversight AES, Southern, TVA Advisory Panel EPRI Consultant to Advisory Panel 3

4 Holland, MI Oxycoal CFB Project Site Metropolitan population: 260,000 Municipal owned utility: formed in 1885 Generating capacity: >250 MWe Services: water, sewage, electric & cable Financial rating: Aa or better James De Young Generating Station 3 existing boilers generating 60MWe Addition of 78 MWe CFB unit planned PRB coal, biomass & tired derived fuels Goals: air quality, growth, competitiveness 4

5 DOE Clean Coal Power Initiative Targeting advanced coal based power technologies that capture and store > 300,000 tons/yr of CO 2 with a minimum 90% capture rate In July 09 DOE selected 2 CCS projects for $400MM award Pre-combustion and post-combustion CO 2 capture DOE added ~$1B in awards, invited more proposals Application for the Holland project submitted in August Project awards will be announced in Q

6 Project Timeline Project Definition Design Construction Demonstration

7 Commercialization Advance the state of the art for the oxy-combustion option Modular design of CFB will allow direct scale-up to a commercial scale plant Technology will be ready when regulations make CCS economically viable Largest Unit By 2014* Holland, MI 2015 Commercial Plant 2020 Air-fired CFB, MWe* Oxy-fired Oy CFB, MWe* ASU, tpd* 3,000+ ~1, CPU, tpd* 600 ~2, Coal power plant with CCS, CO 2 tpy ~600,000 ~3,000,000 * Indicates experience of the project team members 7

8 Oxy-Coal CFB Power Plant with CCS Flexi burn TM CFB Boiler Water Fresh Water Vent Air Nitrogen Fuel Lime FG Condenser CO 2 Condensate Oxygen Ash Air Separation Unit Power Plant CO 2 Processing Unit Pipeline & Storage 8

9 CFB Process Advantages Feature Low furnace temperatures Hot circulating solids Long solid residence time Benefit - Low NO x - In-bed SO 2 capture -Fuel flexibility (Biomass) - Ideal for Oxy-coal CCS - Tolerant to fuel variations - Efficient heat transfer - Simple feed systems - Uniform heat flux o F ft/sec Oxidant Fuel 1/2 x 0 Limestone 1/20 x 0 - Good fuel burnout - Good sorbent Limestone utilization Flue Gas o F Oxidant 9

10 CPU Schematics Vent (Atm gases, CO, moisture, traces of SOx and NOx) VPSA Cold box Vent CO 2 -Rich Flue Gas (>80% CO 2 on dry basis) H 2 O H 2 O Expander Cold Box FG Cooler/ Condenser Condensate (All of HCl & HF, Some of PM, SOx, NOx & Hg) Dryer Carbon Beds bar Hg > 95% CO 2 (Residual atm gases, Trace SOx, NOx, CO) 90% CO 2 capture with cold box alone VPSA for recovering additional CO 2 Increases CO 2 capture rate to ~99% Manages air ingress Near-zero emissions 10

11 CO2 Storage Geologic Framework Michigan Basin a regional geologic structure consisting of thick sequences of sedimentary y rocks. Highly prospective geological sequestration system Mt. Simon Sandstone is the primary target at depths of ~5000 to 6000 ft Injection j zone is overlaid by y several confining g layers y 11

12 CO 2 Storage- Geologic Framework Initial geological evaluation of the site has been performed The site is in a promising area for CO 2 storage because the Mt. Simon is ~1,000 ft thick with high permeability and porosity, supported by data from nearby injection wells and reservoir simulations. 12

13 Reservoir Simulations Preliminary reservoir simulations of the CO 2 injection and storage process indicate the ability to inject over 600,000 tons CO 2 per year in a single well. 13

14 Regulatory Framework Air permit CO 2 injection permit Liability Working closely with State of Michigan 14

15 Summary 78 MWe Oxy-Coal CFB with CCS Enable direct scale-up to a larger scale CCS plant Near zero emissions of CO 2, SOx, NOx and Hg Very promising geological storage site Strong support from the State of Michigan 15