Co-gasification of coal and biomass: Synergy, characterization and reactivity of the residual char
Co-gasification of coal and biomass: Synergy, characterization and reactivity of the residual char
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煤和生物质的共气化：残余炭的协同作用、表征和反应性
DOI：
10.1016/j.biortech.2017.07.111
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发表时间：
2017
影响因子：
11.4
通讯作者：
Chen Hanping
中科院分区：
文献类型：
--
作者：
Hu Junhao;Shao Jingai;Yang Haiping;Lin Guiying;Chen Yingquan;Wang Xianhua;Zhang Wennan;Chen Hanping
在立式固定床反应器中研究了煤与生物质共气化过程中煤与生物质的协同作用，考察了共气化残焦的物化结构特征和气化反应活性。结果表明，由于煤与生物质之间的协同作用，提高了残焦和焦油转化为天然气的能力。在共气化过程中，随着生物质加入量的增加，残焦的物理结构呈现出更多的孔隙。煤和生物质之间存在着无机元素的迁移，K2SiO_3、KAl_SiO_4和Ca3Al_2(SiO_4)_3的形成和竞争作用是协同作用的机理之一。随着生物质掺混比的增加，石墨化程度提高，但残焦中的石墨微晶尺寸减小。热重分析结果有力地表明，尽管受到共气化的影响，来自煤和生物质的焦炭的反应活性有很大的差异。
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 K2SiO3, KAlSiO4, and Ca3Al2(SiO4)3is 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.