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题名: Basicities and transesterification activities of Zn-Al hydrotalcites-derived solid bases
作者: Liu, Qianhe1, 2;  Wang, Bingchun1;  Wang, Congxin1;  Tian, Zhijian1, 3;  Qu, Wei1;  Ma, Huaijun1;  Xu, Renshun1
刊名: GREEN CHEMISTRY
发表日期: 2014
DOI: 10.1039/c3gc42648c
卷: 16, 期:5, 页:2604-2613
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: Solid bases were prepared by calcining as-prepared Zn-Al hydrotalcites at different temperatures. The evolutions of their structure and basicity were characterised using X-ray diffraction, thermogravimetric analysis, infrared spectroscopy of CO2 adsorption and temperature programmed desorption of methanol. With an increase in the calcination temperature, the as-prepared Zn-Al hydrotalcites were firstly converted into dehydrated Zn-Al hydrotalcites and next converted into Zn-Al oxides. The basic sites of these solid bases changed from OH groups to Mn+- O2- (M = Zn or Al) pairs and isolated O2- ions. These solid bases were evaluated in transesterification reactions used for biodiesel production. The dehydrated Zn-Al hydrotalcites obtained at 473 K exhibit the highest activity, with a biodiesel yield of approximately 76% at 413 K, 1.7 MPa and 1.0 h(-1). This catalyst exhibits no deactivation after about 150 h. The structure-reactivity relationship of the catalyst is also discussed.
关键词[WOS]: LAYERED DOUBLE HYDROXIDES ;  BIODIESEL PRODUCTION ;  ALDOL CONDENSATION ;  CATALYSTS ;  ADSORPTION ;  OXIDES ;  REACTIVITY ;  SITES ;  DECOMPOSITION ;  METHANOL
语种: 英语
WOS记录号: WOS:000335005200032
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/145557
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Natl Lab Clean Energy, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Liu, Qianhe,Wang, Bingchun,Wang, Congxin,et al. Basicities and transesterification activities of Zn-Al hydrotalcites-derived solid bases[J]. GREEN CHEMISTRY,2014,16(5):2604-2613.
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