期刊
ENERGY & FUELS
卷 30, 期 3, 页码 1616-1627出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.energyfuels.5b02258
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资金
- Ministry of Environment (MOE), Japan
- Japan Society for the Promotion of Science (JSPS) [26249120]
- Grants-in-Aid for Scientific Research [26249120] Funding Source: KAKEN
An advanced type of gasification at atmospheric pressure, which is termed type IV gasification, has been proposed with potential performance to achieve a stand-alone cold gas efficiency over 95% lower heating value (LHV). This work aimed to prove the concept of type IV gasification of lignite. Continuous conversion of a Victorian lignite was simulated experimentally in a sequence of pyrolysis of potassium (K)-loaded lignite, vapor-phase steam-oxygen reforming of volatiles, and simultaneous steam reforming over the K-loaded char and its steam gasification. Systematic investigation of the effects of key operating variables on the process performance has reached their combination that realized steady-state carbon conversion of approximate to 100% together with tar concentration in the syngas of <30 mg Nm(-3) dry. A suite of variables, K loading to the lignite of 3.3 wt % dry lignite, steam/carbon molar ratio of <0.8, oxygen/carbon molar ratio of <0.24, temperature for the pyrolysis of 600 degrees C, and char bed temperature for steam gasification/reforming of 750 degrees C, satisfied the requirement for type IV gasification.
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