Kinetics of Shenhua coal liquefaction catalyzed by SO42=/ZrO2 solid acid
Kinetics of Shenhua coal liquefaction catalyzed by SO42=/ZrO2 solid acid
复制标题
SO42=/ZrO2固体酸催化神华煤液化动力学
DOI：
10.1016/j.fuel.2009.02.019
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发表时间：
2010
期刊：
影响因子：
7.4
通讯作者：
Shui, Hengfu
中科院分区：
文献类型：
--
作者：
Zhang, Dexiang;Chen, Zhixiong;Wang, Zhicai;Shui, Hengfu
基于煤和煤液化中间产物的结构不均匀性，采用动力学块法建立了SO42=/ zro2固体酸催化剂催化神华煤液化的动力学模型。发现煤在液化过程中直接加氢裂解为预沥青质、沥青质、石油和天然气，预沥青质和沥青质的进一步加氢裂解为石油和天然气产品。在这一过程中存在一定的倒退反应。在实验条件范围内，模型计算的液化转化率与SO42=/ zro2固体酸催化神华煤液化的实验数据吻合较好，活化能为69 ~ 136kjmol−1。在较高的液化温度下存在明显的倒退反应。但在450℃液化过程中，除了油气向沥青质的退变过程外，还存在沥青前质和沥青质向焦炭的缩合过程。
Based on the structural inhomogeneities of coal and intermediate products of coal liquefaction, a new kinetic model was advanced to simulate the Shenhua coal liquefaction catalyzed by SO42=/ZrO2solid acid catalyst using kinetic lump method. It was found that coal was hydrocracked to preasphaltene, asphaltene, oil and gas directly, and preasphaltene and asphaltene were further hydrocracked into oil and gas products in coal liquefaction. Certain regressive reactions existed in the process. The liquefaction conversions calculated from the model agreed well with the experimental data for Shenhua coal liquefaction catalyzed by SO42=/ZrO2solid acid at the range of experimental conditions, and the activation energies were 69–136kJmol−1. There existed obvious regressive reactions at higher liquefaction temperatures. However, besides the regressive transformation of oil and gas to asphaltene at 450°C liquefaction, there also existed condensation processes of preasphaltene and asphaltene to coke.
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