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Catalysis Of So_4~(2-)/zro_2 Solid Acid For The Liquefaction Of Coal

机译：So_4〜（2-）/ zro_2固体酸催化煤液化

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摘要

In order to study the catalysis of SO_4~(2-) /ZrO_2 solid acid for the liquefaction of coal, a series of SO_4~(2-) /ZrO_2 solid acids were synthesized by the method of precipitation-impregnation. The catalytic behaviours of the SO_4~(2-)/ZrO_2 solid acids for the hydro-liquefaction of Shenhua coal and model compounds, such as diphenylmethane, bibenzyl and phenyl ethyl ether, were investigated. In addition, non-catalytic liquefaction and the catalytic liquefaction under N_2 were further compared with the catalytic liquefaction under H_2 in order to understand the catalytic mechanism of SO_4~(2-)/ZrO_2 solid acid. The results indicate that hydro-liquefaction conversions of coal and model compounds are related to the strength, amount and nature of acid sites on the surface of SO_4~(2-)/ZrO_2, and the strong acid site responds to their catalytic activities. The SO_4 ~(2-)/ZrO_2 solid acid catalyzes mainly the hydro-cracking, ring-opening and hydrogenation reactions of coal to produce oil and gas during the coal liquefaction. The hydro-cracking reactions in the liquefaction of model compounds and coal catalyzed by SO_4~(2-)/ZrO_2 involved via carbenium ion intermediate instead of traditional radicals intermediate.
机译：为了研究SO_4〜（2-）/ ZrO_2固体酸对煤液化的催化作用，采用沉淀浸渍法合成了一系列SO_4〜（2-）/ ZrO_2固体酸。研究了SO_4〜（2-）/ ZrO_2固体酸对神华煤与二苯甲烷，联苄和苯乙基醚等模型化合物加氢液化的催化行为。此外，为了进一步了解SO_4〜（2-）/ ZrO_2固体酸的催化机理，进一步比较了非催化液化和N_2催化的液化与H_2催化的液化。结果表明，煤和模型化合物的液化转化率与SO_4〜（2-）/ ZrO_2表面酸性位的强度，数量和性质有关，而强酸性位对其催化活性作出反应。 SO_4〜（2-）/ ZrO_2固体酸主要催化煤液化过程中煤的加氢裂化，开环和加氢反应，从而产生油气。 SO_4〜（2-）/ ZrO_2催化通过碳离子中间体代替传统的自由基中间体在液化过程中发生加氢裂化反应。

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