烟煤快速加氢热解的研究Ⅰ．气氛影响的考察

STUDY ON FLASH HYDROPYROLYSIS OF BITUMINOUS COAL Ⅰ EFFECT OF ATMOSPHERES

在气流床快速热解装置上，系统地研究了内蒙东胜烟煤在氢气和氮气气氛中的快速热解行为。结果表明：在常压、７００℃，煤在氢气氛中快速热解获得的液态烃的产率达２．６％，比在氮气氛中提高了８０％，在６．０ＭＰａ的压力下，在氢气氛中的液态烃的产率是氮气氛的１７倍；在常压、８００℃时，在氢气氛中热解获得的甲烷产率达８．０％，比在同条件的氮气氛中提高了２．５倍，６．０ＭＰａ、７００℃时，在氢气氛中的甲烷产率是氮气氛的５．３倍。烟煤在氢气氛中快速热解更有利于获取三苯（苯，甲苯，二甲苯）、三酚（苯酚，甲酚。

The flash pyrolysis of Dongsheng bituminous coal in H 2 and N 2 atmospheres were studied in a small entrained reactor The results showed that the yield of HCL (liquid hydrocarbon) produced in H 2 reached 2 6% at normal pressure and 700℃ which was 80% more than that produced in N 2 at the same condition. The yield of HCL in H 2 at 6 0MPa and 700℃ were 17 times larger than that produced in N 2 A large amount of free radical produced during coal pyrolysis can be fixed by hydrogen, so pyrolysis in H 2 can provide more HCL than pyrolysis in N 2 The yield of methane produced in H 2 was increased by 2 5 times of that produced in N 2 at normal pressure and 800℃ The yield of methane produced in H 2 was 4 3 times larger than that produced in N 2 at 6 0MPa pressure and 700℃ Production of methane needs enough hydrogen Pyrolysis in H 2 provides large amount of hydrogen for production of methane