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摘要: 用TG-FTIR联用技术研究了碱金属、碱土金属和过渡金属对宝日希勒褐煤和包头烟煤热解的催化作用和挥发分析出的影响。结果表明，各种催化剂对褐煤和烟煤热解的催化效果分别为Ni>Fe~Ca>K和Ca~Fe>Ni>K，K2CO3对煤的热解没有明显的催化作用。催化剂使褐煤和烟煤热解转化率增加的最大值分别为10.1％和6.4％。烟煤热解生成的CH4比褐煤的多，不同的催化剂使煤热解挥发产物CO2、H2O、CH4和CO增加的幅度不一样，催化效果与温度和煤的变质程度有关。Abstract: The catalytic effects of alkali, alkaline earth and transition metals on pyrolysis of a lignite and a bituminous coal were investigated using TG-FTIR. The results indicate that the orders of catalytic effect on the pyrolysis of lignite and bituminous coals are Ni>Fe～Ca>K and Ca～Fe>Ni>K, respectively. The maximal increments of conversion for the lignite and the bituminous coal are 10.1% and 6.4% respectively with catalysts loaded. The CH4 yield of the bituminous coal is larger than that of the lignite. The increase in yield of CO2, H2O, CH4 and CO is dependent on the catalysts, which are closely related to temperature region and coal ranks.
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Key words:
- coal /
- catalyst /
- catalytic pyrolysis /
- TG-FTIR
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