Guaiacol, a mono-aromatic compound containing a hydroxyl and a methoxyl group, is one of the main products from lignin pyrolysis. In order to investigate the feasibility of aromatic hydrocarbons production from lignin, guaiacol was employed as the model compound for the catalytic conversion over HZSM-5 zeolites with different Si/Al ratios in a fixed-bed reactor under the temperatures from 500 °C to 800 °C. With the increased temperature, the yield of both aromatic hydrocarbons (such as benzene, toluene, styrene, naphthalene and 2-methylnaphtalene) and coke was increased from the mass fraction of 1.83%–24.27% and from 1.17% to 12.81%, respectively. At 600 °C, the yield of benzene was promoted by the HZSM-5 catalyst with high Si/Al ratio (200) by the mass fraction of 2.94% and up to 1.94% for that of toluene. The production of monocyclic aromatic hydrocarbons (especially for benzene and p-xylene) was favored with the loading of Ni on HZSM-5(25), while the formation of polycyclic aromatic hydrocarbons was notably inhabited. The coke deposition was slightly increased with the increased loading of Ni during the catalytic conversion of guaiacol. The demethoxylation and dehydroxylation reactions were considered to be promoted by the increase of Brønsted acid sites, while the methyl substitution reaction was slightly influenced by the total acidity of catalyst. The experimental results provided the conceptual and technical support for the catalytic pyrolysis of lignin to produce aromatic hydrocarbons.

愈创木酚，一种含有羟基和甲氧基的单芳族化合物，是木质素热解的主要产物之一。为了研究木质素生产芳烃的可行性，将愈创木酚用作模型化合物，用于在固定床反应器中于500°C至800°C的温度下，以不同的Si / Al比在HZSM-5沸石上进行催化转化。 ℃。随着温度的升高，芳烃（如苯，甲苯，苯乙烯，萘和2-甲基萘）的收率和焦炭的收率分别从1.83％–24.27％和1.17％增至12.81％。在600°C下，具有高Si ​​/ Al比（200）的HZSM-5催化剂可提高苯的收率，其质量分数为2.94％，而甲苯的质量分数最高为1.94％。HZSM-5（25）上的Ni负载有利于单环芳烃的生产（特别是苯和对二甲苯），而多环芳烃的形成则特别容易。在愈创木酚的催化转化过程中，随着Ni负载量的增加，焦炭沉积会略有增加。布朗斯台德酸位点的增加促进了脱甲氧基化和脱羟基反应，而催化剂的总酸度对甲基取代反应的影响很小。实验结果为木质素催化热解制备芳烃提供了理论和技术支持。而多环芳烃的形成则特别有人居住。在愈创木酚的催化转化过程中，随着Ni负载量的增加，焦炭沉积会略有增加。布朗斯台德酸位点的增加促进了脱甲氧基化和脱羟基反应，而催化剂的总酸度对甲基取代反应的影响很小。实验结果为木质素催化热解制备芳烃提供了理论和技术支持。而多环芳烃的形成则特别有人居住。在愈创木酚的催化转化过程中，随着Ni负载量的增加，焦炭沉积会略有增加。布朗斯台德酸位点的增加促进了脱甲氧基化和脱羟基反应，而催化剂的总酸度对甲基取代反应的影响很小。实验结果为木质素催化热解制备芳烃提供了理论和技术支持。而甲基取代反应则受到催化剂总酸度的影响。实验结果为木质素催化热解制备芳烃提供了理论和技术支持。而甲基取代反应则受到催化剂总酸度的影响。实验结果为木质素催化热解制备芳烃提供了理论和技术支持。