Calcium addition in straw gasification
Calcium addition in straw gasification
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DOI：
10.1016/s0016-2361(02)00337-x
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发表时间：
2003-04
期刊：
影响因子：
7.4
通讯作者：
H. Risnes;J. Fjellerup;U. Henriksen;A. Moilanen;P. Norby;K. Papadakis;D. Posselt;L. H. Sørensen
中科院分区：
文献类型：
--
作者：
H. Risnes;J. Fjellerup;U. Henriksen;A. Moilanen;P. Norby;K. Papadakis;D. Posselt;L. H. Sørensen
本文主要研究了加钙对气化过程的影响。研究了无机元素与有机元素的相互作用以及无机元素与无机元素的相互作用。钙作为钙糖/糖蜜溶液加入秸秆对灰分化学性质和灰分烧结倾向有显著影响，但对焦炭反应性影响较小。进行了热平衡测试和高温x射线衍射测试，结果表明，在炭转化过程中，随着钙的加入，主要的无机-无机反应发生在很晚的阶段。综合全局平衡计算预测了无机灰渣的重要特征。平衡计算预测，如果加入足够量的钙，就会形成液态盐。根据实验和计算，钙主要以硅酸钙的形式与硅结合，而较少以硅酸钙钾的形式与硅结合。
The present work focuses on the influence of calcium addition in gasification. The inorganic–organic element interaction as well as the detailed inorganic–inorganic elements interaction has been studied. The effect of calcium addition as calcium sugar/molasses solutions to straw significantly affected the ash chemistry and the ash sintering tendency but much less the char reactivity. Thermo balance test are made and high-temperature X-ray diffraction measurements are performed, the experimental results indicate that with calcium addition major inorganic–inorganic reactions take place very late in the char conversion process. Comprehensive global equilibrium calculations predicted important characteristics of the inorganic ash residue. Equilibrium calculations predict the formation of liquid salt if sufficient amounts of Ca are added and according to experiments as well as calculations calcium binds silicon primarily as calcium silicates and less as potassium calcium silicates.