Kinetic study on catalytic dehydration of 1,2-propanediol and 1,2-butanediol over H-Beta for bio-ethylene glycol purification

doi:10.1016/j.cej.2017.10.134

	Kinetic study on catalytic dehydration of 1,2-propanediol and 1,2-butanediol over H-Beta for bio-ethylene glycol purification
	Wang, Aiqin; Ai, Shuo; Zheng, Mingyuan; Jiang, Yu; Pang, Jifeng; Wang, Chan; Wang, Xiaodong; Zhang, Tao
刊名	CHEMICAL ENGINEERING JOURNAL
	2018-03-01
卷号	335 页码:530-538
关键词	Kinetics Ethylene Glycol Propanediol Butanediol Dehydration Acetalization
ISSN号	1385-8947
DOI	10.1016/j.cej.2017.10.134
文献子类	Article
英文摘要	1,2-propanediol (PDO) and 1,2-butanediol (BDO) are preferentially dehydrated over the H-Beta zeolite catalyst in the presence of ethylene glycol (EG). The reaction kinetics of diol conversions over H-Beta was studied. The PDO and BDO conversions were found to follow the route of pseudo-first-order reaction (dehydration) or pseudo-second-order reaction (dehydration and acetalization), which was highly dependent on the diol/H-Beta mass ratio. At the ratios < 1, aldehydes were the dominant products from the pseudo-first-order reactions. EG dehydration rarely produced acetaldehyde but formed oligomers following pseudo-third-order kinetics. The apparent activation energies (E-a) for PDO and BDO conversions to aldehydes were lower than that of the EG oligomerization (69.9, 54.0, 99.3 kJ/mol, respectively), consistent with the reactivity order of BDO > PDO > EG as evidenced in temperature-programed reaction analysis. At the mass ratios > 16-25, acetals were the main products from the pseudo-second-order reactions, and Ea values of PDO and BDO conversions were 153.6 and 120.7 kJ/mol, respectively. The acetalization has a much lower Ea value than that of diol dehydration. The reactions of PDO conversion were first-order with respect to the H-Beta catalyst regardless of the diol/H-Beta mass ratio, indicating that the acetalization follows the Eley-Rideal mechanism.
WOS关键词	SOLID-ACID CATALYSTS ; PROPYLENE-GLYCOL ; PINACOL REARRANGEMENT ; CONCERTED MECHANISM ; LIQUID-EQUILIBRIUM ; CARBIDE CATALYSTS ; TUNGSTEN CARBIDE ; WOODY BIOMASS ; CONVERSION ; CELLULOSE
WOS研究方向	Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000430700500058
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/169172]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者	Zheng, Mingyuan; Zhang, Tao
作者单位	Chinese Acad Sci, Dalian Inst Chem Phys, iChEM Collaborat Innovat Ctr Chem Energy Mat, State Key Lab Catalysis, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Wang, Aiqin,Ai, Shuo,Zheng, Mingyuan,et al. Kinetic study on catalytic dehydration of 1,2-propanediol and 1,2-butanediol over H-Beta for bio-ethylene glycol purification[J]. CHEMICAL ENGINEERING JOURNAL,2018,335:530-538.
APA	Wang, Aiqin.,Ai, Shuo.,Zheng, Mingyuan.,Jiang, Yu.,Pang, Jifeng.,...&Zhang, Tao.(2018).Kinetic study on catalytic dehydration of 1,2-propanediol and 1,2-butanediol over H-Beta for bio-ethylene glycol purification.CHEMICAL ENGINEERING JOURNAL,335,530-538.
MLA	Wang, Aiqin,et al."Kinetic study on catalytic dehydration of 1,2-propanediol and 1,2-butanediol over H-Beta for bio-ethylene glycol purification".CHEMICAL ENGINEERING JOURNAL 335(2018):530-538.