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剑麻纤维素合成多级孔SAPO-11分子筛及其临氢异构化性能
作者: 娜1 2 王海彦1 2  浩2  王钰佳2 杨占旭2  蕾1 2 
单位:1. 中国石油大学(华东)化学工程学院 山东 青岛 266580  2. 辽宁石油化工大学化学化工与环境学部 辽宁 抚顺 113001 
关键词:剑麻纤维素 SAPO-11分子筛 临氢异构 多级孔 
分类号:O643.36
出版年,卷(期):页码:2018,46(1):108-115
DOI:
摘要:

用酸碱处理的剑麻纤维素作为模板剂,采用一步水热法合成多级孔SAPO-11分子筛。对合成分子筛的形貌、孔结构和酸类型进行表征;以正十二烷作为原料,考察Pt负载量为0.5% (质量分数)的SAPO-11分子筛的异构化反应性能。结果表明:利用酸碱处理后的剑麻纤维素合成的多级孔SAPO-11分子筛具有较大的BET比表面积,分子筛中有明显的介孔产生,分子筛孔道内B酸和L酸的比值增加,在正十二烷的临氢异构化反应中表现出更为优异的催化性能。在反应温度为320 ℃,反应空速为2.0 h?1,反应压力为2 MPa,氢与油体积比为200:1条件下正十二烷转化率为95.36%时,异构烃收率为69.36%。

The hierarchical pore SAPO-11 molecular sieves were synthesized by a conventional one-step hydrothermally method with acid-base treatment sisal fibers. The morphology, pore structure properties and acid types of the hierarchical pore SAPO-11 molecular sieves were investigated. The catalytic hydroisomerization performance of hierarchical pore SAPO-11 catalysts with 0.5%Pt loading was evaluated with n-dodecane as a material. The results indicate that the sample synthesized by adding sisal fiber treated with acid and alkali has a greater specific surface area and a mesoporous structure, and increases a ratio of B acid to L acid in the SAPO-11 molecular sieve pore. The SAPO-11 catalyst sample exhibits the excellent catalytic performance in the n-dodecane hydroisomerization. The n-dodecane conversion rate is 95.36%, and the isomer yield is 69.36% at the reaction temperature of 320 oC, reaction space velocity of 2.0 h?1, reaction pressure of 2 MPa, and hydrogen and oil volume ratio of 200:1.

基金项目:
国家自然科学基金项目(2016-Z0030)。
作者简介:
孙 娜(1981—),女,博士研究生。
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