Hydroliquefaction kinetics of coal-derived preasphaltenes catalyzed by FeS and S
Hydroliquefaction kinetics of coal-derived preasphaltenes catalyzed by FeS and S
复制标题
FeS和S催化煤源前沥青质加氢液化动力学
DOI：
10.1016/s1872-5813(21)60049-x
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Wang Xiaoling
中科院分区：
文献类型：
--
作者：
Kang Shigang;Gao Bin;Shui Hengfu;Wang Zhicai;Lei Zhiping;Ren Shibiao;Yan Jingchong;Li Zhanku;Pan Chunxiu;Yan Honglei;Wang Xiaoling
为了优化煤直接液化条件，提高油收率，在30 mL高压釜中，采用FeS+S催化剂和四氢化萘，在初始氢气5.0 MPa、停留时间0~60 min、反应温度380~440 ℃下对煤直接液化预沥青质进行加氢液化行为，以优化煤直接液化条件，提高油收率。建立了新的动力学模型，采用块状动力学模型模拟FeS+S催化剂催化预沥青质加氢液化，发现预沥青质直接加氢液化为沥青质和焦炭，然后沥青质加氢裂化为油+气产品。预沥青质向焦炭和沥青质向预沥青质的回归反应在较高温度下发生。较高的温度和较长的时间有利于提高预沥青质转化率和油气收率。在440 ℃、60 min条件下预沥青质加氢液化率达到79.45%，油气收率34.7%。模型计算的加氢液化转化率与实验数据吻合较好，活化能范围在50~245 kJ/mol之间。
Hydroliquefaction behavior of preasphaltenes,derived from direct coal liquefaction,was carried out in a 30 mL autoclave with FeS + S catalyst and tetralin at initial hydrogen of 5.0 MPa,residence time of 0-60 min and reaction temperature of 380-440 °C in order to optimize the conditions of direct coal liquefaction and improve oil yield.The products distribution and kinetic parameters of preasphaltenes catalytic hydroliquefaction were investigated.A new kinetic model was established to simulate the preasphaltenes hydroliquefaction catalyzed by FeS + S catalyst using lump kinetic model.It was found that preasphaltenes were hydroliquefaction into asphaltenes and char directly,and then asphaltenes were hydrocracked into oil + gas products.Regressive reactions of preasphaltenes to char and asphaltenes to preasphaltenes occurred at higher temperatures.Higher temperature and longer time were favorable for increasing the conversion of preasphaltenes and the oil + gas yield.The hydroliquefaction of preasphaltenes under 440 °C and 60 min reached 79.45% with 34.7% of oil + gas yield.The hydroliquefaction conversions calculated from the model agreed well with the experimental data,and the activation energies ranged within 50-245 kJ/mol.