System design and analysis of a direct hydrogen from coal system with CO{sub 2} capture
- Institute of Engineering Thermophysics of the Chinese Academy of Sciences, Beijing (China)
Hydrogen is regarded as one of the main energy carriers of the future. On the basis of the previous work, a direct hydrogen production from coal based on a CO{sub 2} sorbent enhanced gasification process was constructed in this paper using the ASPEN PLUS simulator. The system is mainly composed of two paralleled fluidized bed reactors, namely a gasifier and regenerator. Then, on the basis of the proposed system, more than 95% hydrogen and less than 5% methane, CO, and CO{sub 2} (mole percent, dry basis) of gas product is computationally obtained in a wide range of operating conditions. The cold gas efficiency of the system can reach as high as 92.6%. When a hydrogen and power coproduction system is considered, in which hydrogen is used as the fuel of the solid oxide fuel cell combined cycle (SOFC-CC) hybrid system, the system equivalent power efficiency can reach 61.9% considering the CO{sub 2} capture and disposal. Finally, the influences of several key parameters on the system performance, such as operating condition of the gasifier, steam/carbon ratio, Ca/C ratio, and carbon conversion ratio, are investigated. 25 refs., 6 figs., 4 tabs.
- OSTI ID:
- 20905895
- Journal Information:
- Energy and Fuels, Vol. 21, Issue 3; Other Information: xuxiang_1979@hotmail.com; ISSN 0887-0624
- Country of Publication:
- United States
- Language:
- English
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