以桦甸和抚顺油页岩为研究对象,采用热重-红外技术分析了碳酸盐对油页岩热解的影响。通过对比有无碳酸盐存在时油页岩样品的热重曲线、热解特性参数和红外曲线可知,碳酸盐对油页岩热解起到催化作用,且油页岩中内在碳酸盐其催化作用大于外加的碳酸盐;碱金属碳酸盐与碱金属氧化物对油页岩的作用是不等价的。分别向油页岩中加入碱金属碳酸盐K2CO3、MgCO3、Na2CO3、CaCO3,并分析热重曲线和红外曲线,结果显示加入碳酸盐后油页岩有机质热解失重率有不同程度的增加,在有机质热解过程中烃类和芳香族化合物浓度增加,不同碱金属碳酸盐对油页岩的催化作用效果不同;MgCO3相比其他碱金属碳酸盐作用效果明显,且在热解开始阶段表现突出。
Taking Huadian oil shale and Fushun 0il shale as examples and making use of TG-FTIR technolo- gy, the carbonate' s effects on oil shale pyrolysis were investigated. Having TG curves, pyrolysis parameters and infrared curves of the oil shale with or without the carbonate compared to show that the carbonate can play a catalytic action in oil shale pyrolysis process and the carbonate within oil shale has much more impact than the external carbonate; the alkali carbonate' s action doesn't equal to alkali metal oxides' in the oil shale in pyrolysis process. Having alkali carbonate such as K2CO3, MgCO3,Na2CO3 and CaCO3 added to the oil shale respectively and the TG curves and infrared curves analyzed to indicate that after the organic matters' weight- loss rate of the oil shale with added alkali carbonates in pyrolysis process becomes increased at certain degree, and the concentration of both hydrocarbons and aromatic compounds gets increased in the process of organic matter pyrolysis, the different alkali carbonates' catalytic action in the oil shale can become varied. The Mg- CO3 outperforms other alkali carbonates in the catalytic action and becomes outstanding at the beginning of py- rolysis.