煤与生物质共气化：残渣的协同作用、特性和反应性。
Co-gasification of coal and biomass: Synergy, characterization and reactivity of the residual char.
机构信息
State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China.
State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China; Department of New Energy Science and Engineering, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China.
出版信息
Bioresour Technol. 2017 Nov;244(Pt 1):1-7. doi: 10.1016/j.biortech.2017.07.111. Epub 2017 Jul 22.
The synergy effect between coal and biomass in their co-gasification was studied in a vertical fixed bed reactor, and the physic-chemical structural characteristics and gasification reactivity of the residual char obtained from co-gasification were also investigated. The results shows that, conversion of the residual char and tar into gas is enhanced due to the synergy effect between coal and biomass. The physical structure of residual char shows more pore on coal char when more biomass is added in the co-gasification. The migration of inorganic elements between coal and biomass was found, the formation and competitive role of KSiO, KAlSiO, and CaAl(SiO) is a mechanism behind the synergy. The graphization degree is enhanced but size of graphite crystallite in the residual char decreases with biomass blending ratio increasing. TGA results strongly suggest the big difference in the reactivity of chars derived from coal and biomass in spite of influence from co-gasification.
在垂直固定床反应器中研究了煤和生物质在共气化过程中的协同效应，并研究了共气化得到的残余炭的物理化学结构特征和气化反应性。结果表明，由于煤和生物质之间的协同效应，残余炭和焦油转化为气体的转化率得到提高。当共气化中添加更多的生物质时，残余炭的物理结构显示出更多的煤焦孔。发现了无机元素在煤和生物质之间的迁移，KSiO、KAlSiO 和 CaAl(SiO) 的形成和竞争作用是协同作用的机制。随着生物质混合比的增加，残余炭的石墨化程度增强，但石墨微晶的尺寸减小。TGA 结果强烈表明，尽管受到共气化的影响，但来自煤和生物质的炭的反应性存在很大差异。
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