煤质对H2/Ar等离子体热解制乙炔的影响

选取12种不同变质程度的煤，通过等离子体热解实验考察了煤的挥发分产率、煤中氧质量分数、灰分产率对乙炔收率和结焦的影响。研究结果表明，挥发分产率为30%～40%的烟煤，热解时具有较高的乙炔收率；含氧量越高的煤，生成的碳氧化物越多，相应的乙炔收率较低；煤中的矿物质与乙炔收率之间并不存在相关性，但煤中的矿物质有利于CO的生成。影响结焦量的主要因素与煤的矿物质密切相关，煤中掺入二氧化硅和天然河沙能够明显增加结焦量，改变结焦形态。

Effects of coal properties on acetylene formation and coking in H2/Ar plasma pyrolysis

The formation of acetylene by coal plasma pryolysis is strongly dependent on coal properties. The purpose of this paper is to elucidate the effects of coal properties on the acetylene formation and coking in plasma pyrolysis in H_2/Ar. 12 kinds of coals with different coal rank were chosen and the effects of coal properties, including the content of volatile matter, oxygen and ash, on the yields of acetylene and coking were investigated in details. The results show that the bituminous coals containing the volatile matter from 30% to 40% have higher acetylene yield, while the coals with high oxygen content have lower acetylene yield, which corresponds to an increase in carbon conversion to carbon oxides. The content of mineral matter in coal has no significant relationship with the acetylene yield though it would increase the formation of CO. The higher mineral-matter content in coal is found to have a specific effect on the coking. The results of the tests by adding SiO_2 and sands indicate that the high content of mineral-matter would increase the coke formation and affect the configuration of coke.