Co-feeding a hydrogen-rich material with biomass feedstock is an effective approach to enhance the pyrolysis process efficiency. In this research, the effect of methane (H/C_eff ratio of 4) co-feeding on product selectivity of catalytic pyrolysis of lignin and yellow poplar was studied at 600 °C using HY and HZSM-5/metal-modified HZSM-5 as in-situ and ex-situ catalysts, respectively. Fe, Cu, Zn, and Mo with a 3 wt% loading and Ni with 1, 3, and 5 wt% loadings were incorporated into HZSM-5 by incipient wetness impregnation method. Compared to the nitrogen pyrolysis atmosphere, methane enhanced significantly the level of hydrocarbon (BTEX, benzene derivatives and polyaromatics) production from the cellulose and hemicellulose fractions of biomass. Lignin was selectively converted to alkylphenols in catalytic pyrolysis under methane atmosphere. The maximum hydrocarbon yield of 5.86 wt% was obtained from catalytic pyrolysis of yellow poplar using HY (in-situ) and 1 wt% Ni/HZSM-5 (ex-situ) as catalysts, mainly due to the effects of Ni on enhanced methane activation and an increase in the acid site density of HZSM-5. Meanwhile, the coke content of HZSM-5 was increased in both lignin and yellow poplar pyrolysis by replacing the pyrolysis atmosphere of nitrogen with methane.

将富氢材料与生物质原料共同进料是提高热解过程效率的有效方法。在这项研究中，使用HY和HZSM-5 /金属改性的HZSM-5，在600°C下研究了甲烷（H / C _eff比率为4）共进料对木质素和黄杨催化热解产物选择性的影响。如原地和易地催化剂。通过初期湿润浸渍法将HZSM-5中掺入3重量％的Fe，Cu，Zn和Mo，将1、3和5重量％的Ni掺入到HZSM-5中。与氮气热解气氛相比，甲烷显着提高了生物质中纤维素和半纤维素馏分的碳氢化合物（BTEX，苯衍生物和多芳烃）的生产水平。在甲烷气氛下，通过催化热解将木质素选择性地转化为烷基酚。使用HY（原位）和1 wt％Ni / HZSM-5（非原位）催化黄杨的热解，获得的最大烃产率为5.86 wt％）作为催化剂，主要是由于Ni对增强的甲烷活化作用以及HZSM-5的酸性位点密度增加的影响。同时，通过用甲烷代替氮的热解气氛，在木质素和黄杨热解中HZSM-5的焦炭含量均增加。