Catalytic upgrading of coal pyrolysis gaseous tar is one of the promising techniques for the efficient conversion and utilization of tar. The heavy arene in tar can effectively convert into light arene, such as benzene, toluene, ethylbenzene, xylene and naphthalene (BTEXN). Therefore, a series of acid modified Y-type zeolites were prepared by ammonium exchange method, and the effect of Brønsted acid in zeolite and coal rank on the distribution of tar was investigated in this study. The XRD, N₂ adsorption, and pyridine-FTIR analysis results show that the structure of the acid-modified zeolite has not changed, but the content of the medium Brønsted acid changed significantly. The yield of BTEXN produced in the catalytic upgrading of three different rank coal pyrolysis gaseous tar (one is lignite, the other two are bituminous coal) is up to 3.2 times, 2.8 times and 1.7 times that of the raw coal pyrolysis, respectively. The increase in the acidity of medium Brønsted acid greatly contributes to the conversion of heavy arene to BTEXN. For different coal samples, the performance of the catalyst is closely related to its Brønsted acid amount and Brønsted/Lewis ratio. And the textural properties of the zeolite also have an important influence on its catalytic performance.

煤热解气化焦油的催化提质是焦油高效转化和利用的有前途的技术之一。焦油中的重芳烃可以有效地转化为轻质芳烃，例如苯，甲苯，乙苯，二甲苯和萘（BTEXN）。因此，通过铵交换法制备了一系列酸改性的Y型沸石，并研究了布朗斯台德酸在沸石和煤级中对焦油分布的影响。XRD，N ₂吸附和吡啶-FTIR分析结果表明，酸改性沸石的结构未发生变化，但布朗斯台德酸介质的含量发生了显着变化。三种不同等级煤热解气态焦油（一种是褐煤，另一两种是烟煤）催化提质生产的BTEXN的产率分别是原煤热解的3.2倍，2.8倍和1.7倍。布朗斯台德酸中度酸度的增加极大地促进了重芳烃向BTEXN的转化。对于不同的煤样品，催化剂的性能与其布朗斯台德酸量和布朗斯台德/刘易斯比密切相关。沸石的质构性质对其催化性能也有重要影响。