Assessment of calcium-based chemical looping options for gasification power plants

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• 作者：Calin-Cristian Cormos ; ^{cormos@chem.ubbcluj.ro} ; Ana-Maria Cormos
• 关键词：Calcium-based chemical looping ; Gasification ; Hydrogen and power co-generation
• 刊名：International Journal of Hydrogen Energy
• 出版年：2013
• 出版时间：19 February, 2013
• 年：2013
• 卷：38
• 期：5
• 页码：2306-2317
• 全文大小：781 K

文摘

This paper evaluates various calcium-based chemical looping concepts to be applied in Integrated Gasification Combined Cycle (IGCC) plants for decarbonised energy vectors poly-generation (with emphasis on power generation and hydrogen and power co-generation). Two calcium-based chemical looping configurations were analysed. The first concept is based on post-combustion capture using the flue gases resulted from the power block (combined cycle gas turbine). The second concept is based on pre-combustion capture, the calcium-based chemical looping systems being used simultaneous to capture carbon dioxide (by sorbent enhanced water gas shift) and to concentrate the syngas energy in the form of hydrogen-rich gas.

The paper assess in details coal-based IGCC with calcium carbonate looping cycle used for power generation. Net power output is in the range of 550-600?MW with more than 95 % carbon capture rate. Critical design and operation factors like process integration, heat and power integration, quality specification of captured CO₂ stream were evaluated in details. The hydrogen and power co-generation scenario (in the range of 0-200?MW hydrogen) was also evaluated as a potential way to improve the plant flexibility. IGCC power plant without carbon capture was also considered to quantify the energy penalty for carbon capture cases.