In this study, the Powder River Basin (PRB) coal fast pyrolysis was conducted at 700 °C in the atmosphere of syngas produced by CH₄–CO₂ reforming in two different patterns, including the double reactors pattern (the first reactor is for syngas production and the second is for coal pyrolysis) and double layers pattern (catalyst was at upper layer and coal was at lower layer). Besides, pure gases atmosphere including N₂, H₂, CO, H₂–CO were also tested to investigate the mechanism of the coal pyrolysis under different atmospheres. The pyrolysis products including gas, liquid and char were characterized, the result showed that, compared with the inert atmosphere, the tar yield is improved with the reducing atmospheres, as well as the tar quality. The hydrogen partial pressure is the key point for that improvement. In the atmosphere of H₂, the tar yield was increased by 31.3% and the contained BTX (benzene, toluene and xylene) and naphthalene were increased by 27.1% and 133.4%. The double reactors pattern also performed outstandingly, with 25.4% increment of tar yield and 25.0% and 79.4% for the BTX and naphthalene. The double layers pattern is not effective enough due to the low temperature (700 °C) in which the Ni-based catalyst was not fully activated.

在这项研究中，粉煤流域（PRB）煤快速热解是在CH ₄ -CO ₂重整产生的合成气气氛中，在700°C下以两种不同的模式进行的，包括双反应器模式（第一个反应器用于合成气）。生产和第二个是煤热解）和双层模式（催化剂在上层，煤在下层）。此外，包括N ₂，H ₂，CO，H ₂在内的纯净气体气氛还对–CO进行了测试，以研究不同气氛下煤的热解机理。表征了气体，液体和焦炭的热解产物，结果表明，与惰性气氛相比，焦油收率随着还原气氛的提高和焦油质量的提高而提高。氢分压是该改进的关键。在H ₂气氛中，焦油收率提高了31.3％，所含的BTX（苯，甲苯和二甲苯）和萘分别提高了27.1％和133.4％。双反应器模式也表现出色，焦油产率提高了25.4％，BTX和萘的产率分别为25.0％和79.4％。由于低温（700℃），其中镍基催化剂没有被完全活化，所以双层图案不够有效。