Fe2O3/CaO对低阶煤低温催化干馏的影响

摘要

采用自行研发的煤的低温干馏装置，将不同配比下的 Fe2O3/CaO 与长焰煤进行低温催化热解实验，以探索Fe2O3/CaO对低阶煤催化干馏的反应规律。结果表明：随着催化剂Fe2O3/CaO的添加，煤气产率增加约3%，煤气中CH4和H2的含量分别可达到35.69%和17.73%；焦油收率略有降低，但焦油中直链烷烃，以及一些高附加值的化合物如萘、菲、茚、芴等，含量不断增大，实现了低温煤焦油中高附加值化工产品的富集；半焦产率增加约3%，半焦表面变得凹凸不平并有龟裂纹，导致半焦的反应性增加。在对低阶煤热解过程中，Fe2O3和CaO的催化作用具有一定的协同性。%Co-pyrolysis characteristics of low rank mixed with Fe2O3/CaO in different proportions was studied in a dry distillation equipment. Gas yield of low rank coal pyrolysis increased by 3% with addition of Fe2O3/CaO. The contents of CH4 and H2 increased obviously in coal gas,up to 35.69%and 17.73% respectively. The yield of tar slightly decreased,But straight-chain alkanes and some high value-added chemical compounds increased. Char yield increased about 3%,with cracks on uneven char surface,so the reactivity of char increased. The synergistic reaction may exist between the Fe3O3 and CaO.