引用本文:
【打印本页】   【HTML】   【下载PDF全文】   View/Add Comment  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 1459次   下载 1496 本文二维码信息
码上扫一扫!
分享到: 微信 更多
Sorbitol Hydrogenolysis to Glycols over Baisic Additive Promoted Ni-based Catalysts
Xiao-feng Cao1,2, Qi Zhang3, Dong Jiang*1, Qi-ying Liu*3, Long-long Ma3, Tie-jun Wang3, De-bao Li1
1.State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;2.University of Chinese Academy of Sciences, Beijing 100049, China;3.CAS Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
Abstract:
A series of Ni based catalysts with different supports and basic additives were prepared by sequential impregnation method. The catalysts were characterized by XRD, BET, H2-TPR and CO2-TPD techniques. It was found that the introduction of basic additives enhanced the basicities of catalyats and promoted the dispersities of Ni particles by strong interaction between Ni2+ and basic additives. Among the Ni based catalysts, 10%Ni/10%La2O3/ZrO2 showed the superior performance in sorbitol hydrogenolysis. The synergistic effect of Ni and La2O3 was proven to play an essential role in selective synthesis of EG and 1,2-PG. In the optimal reaction condition, the catalyst presented 100% sorbitol conversion and over 48% glycols (EG and 1,2-PG) yield. The kinetics study of polyols (sorbitol, xylitol and glycerol) hydrogenolysis showed that polyols with more hydroxyl number have higher activity and products distribution was final results of kinetic balance, which could give us some inspiration about how to change the products selectivity.
Key words:  Sorbitol hydrogenolysis, Glycols, Ni catalyst, Support, Base promoter
FundProject:
碱助剂促进Ni基催化剂氢解山梨醇制备二元醇
曹晓峰1,2, 张琦3, 姜东*1, 刘琪英*3, 马隆龙3, 王铁军3, 李德宝1
1.中国科学院山西煤炭化学研究所煤转化国家重点实验室,太原 030001;2.中国科学院大学,北京100049;3.中国科学院广州能源研究所中科院可再生能源重点实验室,广州 116023
摘要:
采用逐步湿浸渍的方法制备了一系列含有不同载体和碱促进剂的Ni基催化剂用于生物质基平台化合物山梨醇的氢解反应. 通过反应对载体和碱促进剂进行了筛选和组分含量的优化,碱性促进剂的引入不仅增强了催化剂的碱性,而且通过Ni2+和碱促进剂的强相互作用提高了Ni在催化剂上的分散性;10%Ni/10%La2O3/ZrO2表现出了非常高的氢解活性和较好的二元醇(乙二醇和1,2丙二醇)选择性,金属Ni和碱促进剂La2O3之间的协同作用机理对于山梨醇选择性氢解制备二元醇影响显著. 在优化的反应条件下,山梨醇达到100%的转化并且有超过48%的二元醇产率. 研究中对催化剂进行了XRD、BET、H2-TPR和CO2-TPD表征,用于分析催化剂结构性能. 通过对山梨醇氢解以及中间产物动力学曲线的研究,得出多元醇氢解活性与所含羟基数正相关,产物的最终分布是氢解动力学平衡的最终结果.
关键词:  山梨醇氢解,二元醇,Ni基催化剂,碱促进剂,载体
DOI:10.1063/1674-0068/28/cjcp1501007
分类号: