Pt/SAPO-11催化正十二烷异构化的反应规律
Hydroisomerization of n-Dodecane over Pt/SAPO-11 Catalyst
张鑫 1孙无忌 1马琪琪 1杨桑妮 1宋年华 1邓艾琳 1刘学军 1胡建民2
作者信息
- 1. 浙江工业大学化学工程学院,浙江省生物燃料利用技术研究重点实验室,浙江 杭州 310014
- 2. 浙江捷达科技有限公司,浙江 湖州 313300
- 折叠
摘要
油脂原料经加氢脱氧后的临氢异构化过程是制备生物航煤的关键步骤.采用浸渍法将 Pt 负载到SAPO-11 分子筛上,制备出 Pt/SAPO-11 异构化催化剂,并对分子筛及催化剂的物理化学性能进行了表征.以正十二烷为模型化合物,在固定床加氢反应器上进行催化剂的异构性能评价.结果表明:温度对转化率和选择性的影响最显著,反应温度从350℃升到390℃时,正十二烷转化率由18.8%提高到86.2%,异构十二烷选择性由99.7%下降到67.2%.在 380℃、2 MPa、重时空速为0.45 h-1、氢油体积比为1 500 的条件下,正十二烷转化率达到80.5%,异构十二烷选择性为 70.1%.
Abstract
Following the hydrodeoxygenation of oil and grease feedstocks,the subsequent pro-hydrogen isomerization step assumes a pivotal role in the preparation of bio-aviation.A Pt/SAPO-11 catalyst was meticulously synthesized through the impregnation method,involving the loading of Pt onto SAPO-11 molecular sieve.Comprehensive characterization of the physicochemical properties of both the molecular sieve and the catalyst was conducted.Subsequently,the isomerization performance of the catalyst was assessed using a fixed-bed hydrogenation reactor,employing n-dodecane as a model compound.The results showed the temperature as the primary influencing factor on conversion and selectivity.Specifically,as the reaction temperature increased from 350℃ to 390℃,the conversion of n-dodencane was increased from 18.8% to 86.2%,the selectivity of isododecane was decreased from 99.7% to 67.2% .Under the conditions of 380℃,2 MPa,weight hourly space velocity of 0.45 h-1,and hydrogen-oil volume ratio of 1 500,the conversion of n-dodecane reached 80.5%,and the selectivity of isododecane was 70.1% .
关键词
Pt/SAPO-11/临氢异构/正十二烷/生物航煤/选择性Key words
Pt/SAPO-11/hydroisomerization/n-dodecane/bio-aviation/selectivity引用本文复制引用
基金项目
浙江省科技计划项目"重点研发计划"(2021C01063)
出版年
2024
NETL
NSTL
万方数据