煤矸石
生物量(生态学)
煤
变形(气象学)
生物质气化
环境科学
地质学
材料科学
废物管理
冶金
复合材料
工程类
海洋学
作者
Hai Hong Fan,Fenghai Li,Mingxi Guo,Guopeng Han,Qianqian Guo,Mei‐Ling Xu
摘要
Abstract The effects of coal gangue (CG) on the ash initial deformation temperature (IDT) and CO 2 gasification characteristic of biomass (chestnut shell [CS] and soybean straw [SS]) were investigated by ash fusion tester and thermogravimetric analyzer, respectively. The IDTs of CS and SS ashes were low because of the presence of abundant low melting point (MP) airchildite (K 2 Ca(CO 3 ) 2 ) and arcanite (K 2 SO 4 ), and they were efficiently improved by the CG additions of 2%–10% mass ratios. The increases in the IDTs of CS and SS ashes were resulted from the conversions of fairchildite and arcanite into high MP K‐Al silicates (kalsilite [KAlSiO 4 ], leucite [KAlSi 2 O 6 ], etc.). The gasification reactivities of CS/CG mixtures stayed below that of CS, and they decreased with increasing CG mass ratios (4%–10%) and increased with increasing temperatures (900–1000°C). At 900°C, CG addition caused a decrease in the gasification reactivity of SS. When the temperature reached 950°C, the CG addition of 4% mass ratio increased the gasification reactivity of SS instead. The synergistic effect between biomass and CG during cogasification was more significant at low CG mass ratio and high temperature, and the synergistic effect between SS and CG was more intense than that between CS and CG.
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