Chemical Looping Combustion with Victoria Brown Coal and Australia Ilmenite

Transcription

1 Chemical Looping Combustion with Victoria Brown Coal and Australia Ilmenite Doki Yamaguchi, Liangguang Tang, José Orellana, Trevor Hadley, Seng Lim and Sankar Bhattacharya 16 April nd Australia Japan Symposium for Carbon Resources Utilisation Brisbane CSIRO ENERGY

2 Chemical Looping Combustion (CLC) Emerging clean technology for power generation Inherent CO 2 capture ability Fuel combustion with oxygen from oxygen carrier (MeO x /MeO x 1 ) Versatile fuel option (e.g. coal, natural gas, biomass, waste gas, etc) FR: Fuel Reactor AR: Air Reactor 2 Chemical Looping Combustion with Victoria Brow Coal and Australia Ilmenite Doki Yamaguchi

3 CLC basic advantages CLC technology provides lower energy penalty for CO 2 capture 3 Chemical Looping Combustion with Victoria Brow Coal and Australia Ilmenite Doki Yamaguchi

4 Australian resources and CLC Abundant fuel resources Brown coal: 33 billion tonnes (over 500 years) Natural gas: 3.5 trillion m 3 Low cost oxygen carrier Ilmenite: 2 nd largest world reserve and production CCS facility World class capacity Clean and low cost power generation via CLC 4 Chemical Looping Combustion with Victoria Brow Coal and Australia Ilmenite Doki Yamaguchi

5 Project organisation Low Emissions Technologies 7 Chemical Looping Combustion with Victoria Brow Coal and Australia Ilmenite Doki Yamaguchi

6 Project objectives and activities Low Emissions Technologies Objective: To evaluate feasibility of CLC process for Victorian brown coal Activities: Process development of a fully looped CL reactor system and its evaluation Process demonstration to investigate: Effectiveness and stability of natural ilmenite as oxygen carrier Coal ash oxygen carrier interaction and its extent on CLC activity 5 Chemical Looping Combustion with Victoria Brow Coal and Australia Ilmenite Doki Yamaguchi

7 CSIRO Energy Chemical Looping Facility! Coal feeder Reactor top Control boxes Reactor Furnace Gas analysers (IR and GC) Tar traps and knockout boxes 6 Chemical Looping Combustion with Victoria Brow Coal and Australia Ilmenite Doki Yamaguchi

8 Compact Chemical Looping Reactor Coal IN 212 mm FR OUT LS OUT 172 mm N 2 IN Air IN Overview of CL reactor Reactor internal arrangement 7 Chemical Looping Combustion with Victoria Brow Coal and Australia Ilmenite Doki Yamaguchi

9 CLC operating condition Coal sample: Yallourn (d p = 1 4 mm) Oxygen carrier: natural ilmenite (ca. 22 kg, d p = μm) Coal feed rate: kg/hr (5 10 kw equivalent) FR gas and flow rate: N 2, L/min AR gas and flow rate: Air, L/min Operating temperature: > 950 C Operating pressure: 5 15 kpa,g Property of brown coal (Yallourn) Proximate analysis [wt%, db] Ultimate analysis [wt%, daf] FC VM Ash C H O* N S * Calculated by difference Property of natural ilmenite [wt%] TiO 2 Fe 2 O 3 Mn 3 O 4 SiO 2 Al 2 O 3 Cr 2 O 3 Nb 2 O 5 V 2 O 5 ZrO 2 Na 2 O MgO CaO Chemical Looping Combustion with Victoria Brow Coal and Australia Ilmenite Doki Yamaguchi

10 Process evaluation Startup/Shutdown Coal START FR Startup FR temp AR temp FR Coal STOP Shutdown AR temp FR temp CO 2 CO 2 CO CO O 2 AR temp O 2 AR temp FR temp FR temp AR AR 10 Chemical Looping Combustion with Victoria Brow Coal and Australia Ilmenite Doki Yamaguchi AR

11 Process evaluation Consistency Fuel Reactor, FR Run3 Air Reactor, AR Run5 O 2 CO 2 CO Coal START FR Run6 Coal STOP O 2 AR Run7 CO 2 CO 11 Chemical Looping Combustion with Victoria Brow Coal and Australia Ilmenite Doki Yamaguchi

12 Process demonstration Continuous CLC operation 7.5% 3.2% % 2.1% % 1.8% % 1.3% % 1.2% % 1.2% 7.3 CO 2 : 9.0% CO: 1.0% CO 2 /CO: 8.9 CO 2 /CO ratio High ratio = better combustibility FR = 30L N 2 /min AR = 40L Air/min Progressive increase of CLC activity indicated by increasing CO 2 /CO ratio 12 Chemical Looping Combustion with Victoria Brow Coal and Australia Ilmenite Doki Yamaguchi

13 Continuous CLC operation H 2 TPR analysis Increase in oxygen carrier activity New oxide phases produced 13 Chemical Looping Combustion with Victoria Brow Coal and Australia Ilmenite Doki Yamaguchi

14 Continuous CLC operation XRD analysis a) b) a) b) Fe 2 TiO 5 FeTiO 3 TiO 2 (Rutile) TiO 2 (Anatase) Fe 2 O 3 Day7 Day1 Fresh Fe 2 O 3 and TiO 2 (Anatase) formed after the continuous CLC operation 14 Chemical Looping Combustion with Victoria Brow Coal and Australia Ilmenite Doki Yamaguchi

15 Continuous CLC operation SEM EDX analysis Fresh Day 7 Fresh 36 hrs 100 μm 100 μm 250 μm 250 μm Iron segregation and agglomeration occurred via continuous CLC operation 15 Chemical Looping Combustion with Victoria Brow Coal and Australia Ilmenite Doki Yamaguchi

16 Conclusion Victorian brown coal, together with Australian natural ilmenite, is feasible for CLC application Technical remarks: CLC facility developed enabled continuous circulation of the oxygen carrier to support a stable CLC process over many hours of operation with a series of startup and shutdown; Increased reactivity of oxygen carrier with progress of CLC operation; No notable sign of degradation of oxygen carrier reactivity due to oxygen carrier coal ash interaction; Iron segregation occurred via CL operation, and it is crystalised and agglomerated on the particle surface; 16 Chemical Looping Combustion with Victoria Brow Coal and Australia Ilmenite Doki Yamaguchi

17 Acknowledgement This work was supported by BCIA and we heartily thank the support. Project partners 17 Chemical Looping Combustion with Victoria Brow Coal and Australia Ilmenite Doki Yamaguchi

18 Thank you CSIRO Energy Seng Lim Group Leader t e seng.lim@csiro.au w Key researchers José Orellana, Trevor Hadley, Liangguang Tang, Doki Yamaguchi CSIRO ENERGY