文档介绍：北京化工失学硕士学往论文一种负载型镍基催化剂上糠醇液相加氢制‘四氢糠醇的动力学研究摘要采用高压加氢实验装置和气相色谱仪等分析仪器,实验评价了镍基催化剂上糠醇液相加氢制四氢糠醇的反应行为,从16种不同的催化剂中筛选出1种性能优良的催化剂进行进一步实验研究;系统考察了反应温度、压力、催化剂载量和搅拌转速等操作条件对加氢反应行为的影响规律,得到了适宜的操作条件,反应温度448K、反应压力 3|.5MPa、催化剂载量209/L和搅拌转速1200RPM。在此反应条件下, %,四氢糠醇选择性达到 %。实验研究表明,加氢反应的副反应是在主反应进程过半后开始, 主副反应存在明显的连串关系,发生的副反应为四氢糠醇的深度加氢反应和缩合反应,且对应的反应速率常数相差近两个数量级,因此可近似认为,主副反应的竞争关系可以忽略,即糠醇加氢反应为单一不可逆反应。在半间歇高压反应模式下,排除了气一液、液一固和内扩散传质阻力的显著影响,在反应温度为433~453K、~、搅拌转速为1200RPM、催化剂载量209/L的反应条件下进行了动力学北京化工失学硕士学啦论文研究,经过数据处理得到了相应的动力学方程: ~=(筹]·c。·露; 3川.。MPa范围内rFA=( 最后,实验考察了所选催化剂的使用寿命。研究表明,催化剂可在实验条件下重复使用一次,糠醇转化率和四氢糠醇选择性基本保持不变,。关键词:动力学,气液固反应,糠醇,四氢糠醇,镍基催化剂坐j!竖望堕坚型塑竺!曼塾!型型里些竺!竺婴塑!!!里!!箜堕 IC STUDY FOR LIQUID PHASE HYDROGENATION OF FURFURYL ALCoHOL TOTETRAHYDROFURFURⅥ, ABSTRACT Using high-pressure autoclave as reactor and GC as analytic instnmaent, selective experiments were done order develop liquid phase hydrogenation of furfuryl alcohol to tetrahydrofurfuryl alcohol on a Ni—supported catalyst a semi-batch steady-state operating new kind ofNi—supported catalyst was finally picked out and proved have good performance suitable operating theoperating conditions were set reaction temperature 448K and pressure 3_5MPa and catalyst load 209/L and stirring rate 200RPM,the hydrogenation offurfuryl alcohol could lead high furfuryl alcohol conversion 99。6%andhi曲selectivity oftetrahydrofurfuryl alcohol 98。4%within hours. The structure of work was experimentally studied and proved beconsecutive relation by Concentration-Time Graph Data,Because byproducts were found firstly when thefurfuryl alcohol conversion reached about 60%,Moreover,the ratecoefficients between main and secondary reaction was estimated almost 100 times the semi—batch steady-state operating mode,the elimination ofmass transfer resistance(including gas—liquid interface,liquid—solid interface and solid interior)was validat