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Trace element evaporation during coal gasification based on a thermodynamic equilibrium calculation approach

机译:基于热力学平衡计算方法的煤气化过程中微量元素蒸发

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摘要

[EN] Thermodynamic equilibrium calculations using the HSC-Chemistry program were performed to determine the distribution and mode of occurrence of potentially toxic and corrosive trace elements in gases from coal gasification processes. The influence of temperature, pressure and gas atmospheres on equilibrium composition was evaluated. In these reducing conditions, the behaviour of the trace elements is complex, but some form of organization can be attempted. Elements were classified into three groups. Group A includes those elements that, according to thermodynamic data at equilibrium, could probably be condensed in coal gasification. Mn is classified in this group. Group B contains those elements that could be totally or partially in gas phase in gas cleaning conditions, and can be divided into two subgroups, depending on whether the cleaning conditions are hot or cold. Co, Be, Sb, As, Cd, Pb, Zn, Ni, V, Cr are elements in this group. Group C contains those elements that could be totally in gas phase in all the possible conditions, including flue gas emissions. Se, Hg and B are the elements that make up this group.
机译:[EN]使用HSC-Chemistry程序进行热力学平衡计算,以确定煤气化过程中气体中潜在有毒和腐蚀性微量元素的分布和发生方式。评估了温度,压力和气体气氛对平衡组成的影响。在这些减少的条件下,微量元素的行为很复杂,但是可以尝试某种形式的组织。元素分为三类。 A组包括根据平衡热力学数据可能在煤气化过程中冷凝的元素。 Mn被归入这一组。 B组包含在气体清洁条件下可能全部或部分处于气相的那些元素,根据清洁条件是热还是冷,可以分为两个子组。 Co,Be,Sb,As,Cd,Pb,Zn,Ni,V,Cr是该组中的元素。 C组包含那些在所有可能的条件下都可能完全处于气相的元素,包括烟道气排放。硒,汞和硼是构成这一组的元素。

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