Knowledge Resource Center for Ecological Environment in Arid Area
| DOI | 10.2172/305624 |
| 报告编号 | NREL/CP--570-25315-Vol.2; CONF-980440--Vol.2 |
| 来源ID | OSTI_ID: 305624 |
| Hydrogen production from high moisture content biomass in supercritical water | |
| Antal, M.J. Jr.; Xu, X. [Univ. of Hawaii, Honolulu, HI (United States). Hawaii Natural Energy Inst.] | |
| 英文摘要 | By mixing wood sawdust with a corn starch gel, a viscous paste can be produced that is easily delivered to a supercritical flow reactor by means of a cement pump. Mixtures of about 10 wt% wood sawdust with 3.65 wt% starch are employed in this work, which the authors estimate to cost about $0.043 per lb. Significant reductions in feed cost can be achieved by increasing the wood sawdust loading, but such an increase may require a more complex pump. When this feed is rapidly heated in a tubular flow reactor at pressures above the critical pressure of water (22 MPa), the sawdust paste vaporizes without the formation of char. A packed bed of carbon catalyst in the reactor operating at about 650 C causes the tarry vapors to react with water, producing hydrogen, carbon dioxide, and some methane with a trace of carbon monoxide. The temperature and history of the reactor`s wall influence the hydrogen-methane product equilibrium by catalyzing the methane steam reforming reaction. The water effluent from the reactor is clean. Other biomass feedstocks, such as the waste product of biodiesel production, behave similarly. Unfortunately, sewage sludge does not evidence favorable gasification characteristics and is not a promising feedstock for supercritical water gasification. |
| 出版年 | 1998 |
| 报告类型 | Technical Report |
| 语种 | 英语 |
| 国家 | 美国 |
| 来源学科分类 | 09 BIOMASS FUELS ; 08 HYDROGEN FUEL ; HYDROGEN PRODUCTION ; WOOD WASTES ; STARCH ; MIXTURES ; SUPERCRITICAL GAS EXTRACTION ; METHANE ; CHEMICAL REACTION YIELD ; STEAM REFORMER PROCESSES ; SEWAGE SLUDGE ; EXPERIMENTAL DATA |
| URL | http://www.osti.gov/scitech/servlets/purl/305624 |
| 资源类型 | 科技报告 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/267582 |
| 推荐引用方式 GB/T 7714 | Antal, M.J. Jr.,Xu, X. [Univ. of Hawaii, Honolulu, HI . Hydrogen production from high moisture content biomass in supercritical water,1998. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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