固体酸催化新疆褐煤直接加氢液化研究

为了实现褐煤温和加氢液化联产高附加值酚类化学品,研制了1种新型固体酸催化剂,可以弥补反应条件缓和带来的褐煤大分子结构单元桥健断裂的裂解性能不足,进行了固体酸催化剂的物性表征和活性评价,考察了催化剂类型对褐煤温和加氢液化性能和产物分布的影响规律,探讨了固体酸催化剂用于褐煤温和加氢液化的可行性,并与传统液化进行了比较。结果表明:固体酸催化剂粒径减小,出现了强酸中心,在430℃和15 MPa反应条件下,转化率和油产率与传统液化相当,低级酚产率增加了1.5%,气产率降低近4%,这种固体酸催化剂有利于实现褐煤加氢液化的节能减排增效和产品结构优化,是一种值得关注和深入研究的煤直接加氢液化催化剂。

Solid acid for hydroliquefaction of a lignite from Xinjiang

To achieve the lignite mild liquefaction to high-added value phenols,a new solid acid catalyst was developed to ensure the low cracking under mild condition.Physical property characterization and activity evaluation of the catalyst were conducted.The influences of catalyst type on the reaction and product distribution under the mild condition were studied.The feasibility research on solid acid catalyst used in mild direct coal liquefaction was discussed.The results show that strong acid site forms with the particle diameter of solid acid decreasing.Under the conditions of 430 ℃ and 15 MPa,coal conversion ratio and oil yield are similar to that of traditional process.Phenols yield increases by 1.5％ and gas yield decreases by 4％.The solid acid catalyst is beneficial for energy conservation,emissions reduction,efficiency increase and products optimization.The solid acid catalyst used for direct coal liquefaction should be focused,and further study is needed because of its good coal conversion activity and selectivity.