Catalytic activity of calcium for lignite char gasification in various atmospheres
Catalytic activity of calcium for lignite char gasification in various atmospheres
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DOI：
10.1016/0016-2361(86)90068-2
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发表时间：
1986-06
期刊：
影响因子：
7.4
通讯作者：
Á. Linares-Solano;E. Hippo;P. Walker
中科院分区：
文献类型：
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作者：
Á. Linares-Solano;E. Hippo;P. Walker
在空气、蒸汽、CO2和H2中测量了钙含量为1.1 - 12.9重量%的德克萨斯褐煤焦的气化速率。气化速率随钙负荷的增加而线性增加。CO2在298 K下在存在于炭表面上的CaO上的化学吸附被用来确定CaO颗粒分散。已知该分散，计算钙作为气化反应的催化剂的比活度。在不同的气氛中的比活度的蔓延是大的，它是一个最大的，当焦炭-空气反应与焦炭-H2反应相比。
Gasification rates of a Texas lignite char, having calcium contents varying from 1.1 to 12.9 wt%, were measured in air, steam, CO2, and H2. Gasification rates increased rectilinearly with increase in calcium loading. The chemisorption of CO2at 298 K on the CaO present on the char surface was used to determine CaO particle dispersion. Knowing this dispersion, specific activities of calcium as a catalyst for the gasification reactions were calculated. The spread in specific activities in different atmospheres is large, it being a maximum when the char-air reaction is compared with the char -H2reaction.