Selective hydrogenolysis of xylitol to ethylene glycol and propylene glycol over copper catalysts | |
Huang ZW(黄志威)1,2,3; Chen J(陈静)2,3; Jia YQ(贾玉庆)1; Liu HL(刘海龙)2; Xia CG(夏春谷)2,3; Liu HC(刘海超)1; Xia CG(夏春谷) | |
刊名 | Applied Catalysis B: Environmental |
2014 | |
卷号 | 147期号:无页码:377-386 |
关键词 | Biomass-derived polyols Ethylene glycol Propylene glycol Copper catalysts Selective hydrogenolysis |
ISSN号 | 0926-3373 |
通讯作者 | 刘海超 ; 夏春谷 |
英文摘要 | CuSiO2 catalysts were prepared by homogeneous deposition–precipitation with a wide range of Cu contents (8.8–100 wt%) and Cu particle sizes (2.1–111.1 nm). These catalysts were evaluated in the selective hydrogenolysis of biomass-derived xylitol to ethylene glycol and propylene glycol under the promotion of Ca(OH)2 base. Their catalytic activity and selectivity to the two glycols depended strongly on the Cu particle sizes, which increased with the particle sizes and reached the maximum values at around 20–35 nm. Such size effects are apparently attributed to the effects on the dehydrogenation and hydrogenation activities of the Cu catalysts, and consequently on the xylitol hydrogenolysis pathways, reflecting the structural requirement for the xylitol hydrogenolysis. The effects of the reaction parameters including H2 pressure (0–8.0 MPa), temperature (433–493 K) and pH values (7.0–12.4, adjusted by changing the amount of Ca(OH)2) were examined. These effects confirmed the reaction pathways previously proposed for the xylitol hydrogenolysis to the two glycols, involving the dehydrogenation of xylitol to xylose on Cu as the rate-determining step, followed by the retro-aldol condensation of xylose with Ca(OH)2 to glycolaldehyde and glyceraldehyde, and their subsequent hydrogenation to ultimately form glycols in competition with their side reactions to glycolic acid and lactic acid in the presence of Ca(OH)2. Upon optimizing the reaction conditions (473 K, 6.0 MPa H2 and sufficient Ca(OH)2), nearly 100% xylitol conversion and 54.4% combined selectivity to ethylene glycol and propylene glycol were obtained on CuSiO2 with Cu size of 35.7 nm, comparable to those on the previously reported Ni- and Ru- based catalysts. Clearly, this study provides directions for the design of more efficient Cu catalysts and the optimization of the reaction parameters toward the efficient polyol hydrogenolysis into glycols. |
学科主题 | 物理化学与绿色催化 |
收录类别 | SCI |
资助信息 | the National Natural Science Foundation of China (Grant Nos.21173008;21133011;21203221);the National Basic Research Project of China (Grant 2011CB808700) |
语种 | 英语 |
WOS记录号 | WOS:000330489400042 |
公开日期 | 2013-12-02 |
内容类型 | 期刊论文 |
源URL | [http://210.77.64.217/handle/362003/4267] |
专题 | 兰州化学物理研究所_OSSO国家重点实验室 |
通讯作者 | Xia CG(夏春谷) |
作者单位 | 1.Peking Univ, Coll Chem & Mol Engn, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China 2.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Peoples R China 3.Chinese Acad Sci, Suzhou Inst Nanotech & Nanobion, Suzhou 215123, Peoples R China |
推荐引用方式 GB/T 7714 | Huang ZW,Chen J,Jia YQ,et al. Selective hydrogenolysis of xylitol to ethylene glycol and propylene glycol over copper catalysts[J]. Applied Catalysis B: Environmental,2014,147(无):377-386. |
APA | Huang ZW.,Chen J.,Jia YQ.,Liu HL.,Xia CG.,...&夏春谷.(2014).Selective hydrogenolysis of xylitol to ethylene glycol and propylene glycol over copper catalysts.Applied Catalysis B: Environmental,147(无),377-386. |
MLA | Huang ZW,et al."Selective hydrogenolysis of xylitol to ethylene glycol and propylene glycol over copper catalysts".Applied Catalysis B: Environmental 147.无(2014):377-386. |
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