Study on kinetics of catalytic hydration to ethylene glycol

Yanli Wang; Houliang Dai; Zhengfei Ma; Xiaoqin Liu; Huqing Yao

Study on kinetics of catalytic hydration to ethylene glycol

Yanli Wang, Houliang Dai, Zhengfei Ma, Xiaoqin Liu, Huqing Yao

College of Chemical Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

The kinetics of catalytic hydration from ethylene oxide (EO) was experimentally studied under the reaction conditions of 45~75°C, concentration of NY catalyst 0.093 mol/L and the initial mass ratio of water and EO 6~10. The rate constants and pH value were determined. According to the experimental results, the mechanism of catalytic hydration was proposed, and the rate equation was obtained with parameters estimated by the method of Levenberg-Marquardt. The results showed that the rate equation was first order with respect to the concentration of EO, which the activation energy was 71113.8 J/mol and the pre-exponential constant was 3.05 × 10⁹ min^-1. Compared to the method of direct hydration from EO, NY catalyst could decrease the activity energy and increase the reaction rate.

Original language	English
Pages (from-to)	296-301
Number of pages	6
Journal	Huaxue Fanying Gongcheng Yu Gongyi/Chemical Reaction Engineering and Technology
Volume	21
Issue number	4
State	Published - Aug 2005

Keywords

Catalytic hydration
Ethylene glycol
Kinetics
Rate constant

Cite this

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title = "Study on kinetics of catalytic hydration to ethylene glycol",

abstract = "The kinetics of catalytic hydration from ethylene oxide (EO) was experimentally studied under the reaction conditions of 45~75°C, concentration of NY catalyst 0.093 mol/L and the initial mass ratio of water and EO 6~10. The rate constants and pH value were determined. According to the experimental results, the mechanism of catalytic hydration was proposed, and the rate equation was obtained with parameters estimated by the method of Levenberg-Marquardt. The results showed that the rate equation was first order with respect to the concentration of EO, which the activation energy was 71113.8 J/mol and the pre-exponential constant was 3.05 × 109 min-1. Compared to the method of direct hydration from EO, NY catalyst could decrease the activity energy and increase the reaction rate.",

keywords = "Catalytic hydration, Ethylene glycol, Kinetics, Rate constant",

author = "Yanli Wang and Houliang Dai and Zhengfei Ma and Xiaoqin Liu and Huqing Yao",

year = "2005",

month = aug,

language = "英语",

volume = "21",

pages = "296--301",

journal = "Huaxue Fanying Gongcheng Yu Gongyi/Chemical Reaction Engineering and Technology",

issn = "1001-7631",

publisher = "Zhejiang University",

number = "4",

}

TY - JOUR

T1 - Study on kinetics of catalytic hydration to ethylene glycol

AU - Wang, Yanli

AU - Dai, Houliang

AU - Ma, Zhengfei

AU - Liu, Xiaoqin

AU - Yao, Huqing

PY - 2005/8

Y1 - 2005/8

N2 - The kinetics of catalytic hydration from ethylene oxide (EO) was experimentally studied under the reaction conditions of 45~75°C, concentration of NY catalyst 0.093 mol/L and the initial mass ratio of water and EO 6~10. The rate constants and pH value were determined. According to the experimental results, the mechanism of catalytic hydration was proposed, and the rate equation was obtained with parameters estimated by the method of Levenberg-Marquardt. The results showed that the rate equation was first order with respect to the concentration of EO, which the activation energy was 71113.8 J/mol and the pre-exponential constant was 3.05 × 109 min-1. Compared to the method of direct hydration from EO, NY catalyst could decrease the activity energy and increase the reaction rate.

AB - The kinetics of catalytic hydration from ethylene oxide (EO) was experimentally studied under the reaction conditions of 45~75°C, concentration of NY catalyst 0.093 mol/L and the initial mass ratio of water and EO 6~10. The rate constants and pH value were determined. According to the experimental results, the mechanism of catalytic hydration was proposed, and the rate equation was obtained with parameters estimated by the method of Levenberg-Marquardt. The results showed that the rate equation was first order with respect to the concentration of EO, which the activation energy was 71113.8 J/mol and the pre-exponential constant was 3.05 × 109 min-1. Compared to the method of direct hydration from EO, NY catalyst could decrease the activity energy and increase the reaction rate.

KW - Catalytic hydration

KW - Ethylene glycol

KW - Kinetics

KW - Rate constant

UR - http://www.scopus.com/inward/record.url?scp=27244456163&partnerID=8YFLogxK

M3 - 文章

AN - SCOPUS:27244456163

SN - 1001-7631

VL - 21

SP - 296

EP - 301

JO - Huaxue Fanying Gongcheng Yu Gongyi/Chemical Reaction Engineering and Technology

JF - Huaxue Fanying Gongcheng Yu Gongyi/Chemical Reaction Engineering and Technology

IS - 4

ER -

Study on kinetics of catalytic hydration to ethylene glycol

Abstract

Keywords

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