制备方法对Ni/ZnO催化丙三醇重整-氢解性能的影响

催化学报 , 2012, 33(8): 1266-1. doi: 10.1016/S1872-2067(11)60405-1

制备方法对Ni/ZnO催化丙三醇重整-氢解性能的影响

胡基业 ^1, , 刘晓钰 ^2, , 王彬 ^3, , 裴燕 ^4, , 乔明华 ^5, , 范康年 ^6,

1.复旦大学化学系上海市分子催化和功能材料重点实验室,上海200433

2.复旦大学化学系上海市分子催化和功能材料重点实验室,上海200433

3.复旦大学化学系上海市分子催化和功能材料重点实验室,上海200433

4.复旦大学化学系上海市分子催化和功能材料重点实验室,上海200433

5.复旦大学化学系上海市分子催化和功能材料重点实验室,上海200433

6.复旦大学化学系上海市分子催化和功能材料重点实验室,上海200433

基金项目: 国家自然科学基金(21073043) 上海市科委项目(10JC1401800;08DZ2270500) 国家重点基础研究发展计划(973计划)(2012CB224804) 新世纪优秀人才支持计划(NCET-08-0126)

关键词：镍 , 氧化锌 , 丙三醇 , 重整 , 氢解 , 1,2-丙二醇 , 分散度

Reforming and Hydrogenolysis of Glycerol over Ni/ZnO Catalysts Prepared by Different Methods

采用浸渍法、共沉淀法、水热法和碳微球硬模板法制备了Ni/ZnO催化剂,运用X射线衍射、程序升温还原、透射电子显微镜和氢滴定等手段对其进行了表征,并用于连续固定床反应器中无外加氢气条件下的丙三醇重整-氢解反应.结果表明,在较低空速下,生成的1,2-丙二醇(1,2-PDO)易在Ni分散度较高的催化剂上进一步裂解为乙醇和气相产物；而在较高空速下,其选择性受制于中间产物丙酮醇的加氢.在优化的空速下,Ni分散度越高越有利于1,2-PDO的生成.在Ni分散度最高的Ni/ZnO催化剂上,当丙三醇质量空速为0.84h-1时,1,2-PDO选择性最高,为54.9％,丙三醇转化率为85.4％.

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