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Title: Effect of Water on Ethanol Conversion over ZnO

Abstract

This work focuses on understanding the role of water on ethanol conversion over zinc oxide (ZnO). It was found that a competitive adsorption between ethanol and water occurs on ZnO, which leads to the blockage of the strong Lewis acid site by water on ZnO. As a result, both dehydration and dehydrogenation reactions are inhibited. However, the extent of inhibition for dehydration is orders of magnitude higher than that for dehydrogenation, leading to the shift of reaction pathway from ethanol dehydration to dehydrogenation. In the secondary reactions for acetaldehyde conversion, water inhibits the acetaldehyde aldol-condensation to crotonaldehyde, favoring the oxidation of acetaldehyde to acetic acid, and then to acetone via ketonization at high temperature (i.e., 400 °C).

Authors:
; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1347873
Report Number(s):
PNNL-SA-124546
Journal ID: ISSN 1022-5528; KC0302010
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Topics in Catalysis
Additional Journal Information:
Journal Volume: 59; Journal Issue: 1; Journal ID: ISSN 1022-5528
Publisher:
Springer
Country of Publication:
United States
Language:
English

Citation Formats

Rahman, Muhammad Mahfuzur, Davidson, Stephen D., Sun, Junming, and Wang, Yong. Effect of Water on Ethanol Conversion over ZnO. United States: N. p., 2015. Web. doi:10.1007/s11244-015-0503-9.
Rahman, Muhammad Mahfuzur, Davidson, Stephen D., Sun, Junming, & Wang, Yong. Effect of Water on Ethanol Conversion over ZnO. United States. doi:10.1007/s11244-015-0503-9.
Rahman, Muhammad Mahfuzur, Davidson, Stephen D., Sun, Junming, and Wang, Yong. Thu . "Effect of Water on Ethanol Conversion over ZnO". United States. doi:10.1007/s11244-015-0503-9.
@article{osti_1347873,
title = {Effect of Water on Ethanol Conversion over ZnO},
author = {Rahman, Muhammad Mahfuzur and Davidson, Stephen D. and Sun, Junming and Wang, Yong},
abstractNote = {This work focuses on understanding the role of water on ethanol conversion over zinc oxide (ZnO). It was found that a competitive adsorption between ethanol and water occurs on ZnO, which leads to the blockage of the strong Lewis acid site by water on ZnO. As a result, both dehydration and dehydrogenation reactions are inhibited. However, the extent of inhibition for dehydration is orders of magnitude higher than that for dehydrogenation, leading to the shift of reaction pathway from ethanol dehydration to dehydrogenation. In the secondary reactions for acetaldehyde conversion, water inhibits the acetaldehyde aldol-condensation to crotonaldehyde, favoring the oxidation of acetaldehyde to acetic acid, and then to acetone via ketonization at high temperature (i.e., 400 °C).},
doi = {10.1007/s11244-015-0503-9},
journal = {Topics in Catalysis},
issn = {1022-5528},
number = 1,
volume = 59,
place = {United States},
year = {2015},
month = {10}
}