Effect of the reduction temperature on the selectivity of the high temperature reaction of acetone and hydrogen over alumina and titania supported nickel and cobalt catalysts

Q4 Chemical Engineering 分子催化 Pub Date : 1994-12-15 DOI:10.1016/0304-5102(94)00154-5
Luis M. Gandía, Mario Montes
{"title":"Effect of the reduction temperature on the selectivity of the high temperature reaction of acetone and hydrogen over alumina and titania supported nickel and cobalt catalysts","authors":"Luis M. Gandía,&nbsp;Mario Montes","doi":"10.1016/0304-5102(94)00154-5","DOIUrl":null,"url":null,"abstract":"<div><p>The high-temperature acetone hydrogenation at atmospheric pressure over alumina and titania-supported nickel and cobalt catalysts has been studied. The results obtained during characterization have shown that the preparation steps produced a significant metal—support interaction in the alumina-supported precursors. On the other hand, the high-temperature (500°C) reduced titania-supported catalysts showed catalytic properties which resemble in some aspects those ascribed to the SMSI state. An interesting effect of the previous H<sub>2</sub> reduction temperature on the acetone hydrogenation selectivity has been found. 2-Propanol and methyl isobutyl ketone (MIBK) were the main reaction products. The MIBK selectivity of the alumina-supported catalysts decreased as the temperature of reduction was increased. However, whereas the low-temperature (300°C) reduced titania-supported catalysts did not give any MIBK, a remarkable activity to this product was developed when the temperature of reduction was increased to 500°C. The effect of the temperature of reduction on selectivity has been tentatively explained according to a general model which relates the activation of the carbonyl functional group with specific sites created at the metal—support interface under conditions favourable to the establishment of significant metal—support interactions.</p></div>","PeriodicalId":16567,"journal":{"name":"分子催化","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"1994-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0304-5102(94)00154-5","citationCount":"39","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"分子催化","FirstCategoryId":"1089","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0304510294001545","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"Chemical Engineering","Score":null,"Total":0}
引用次数: 39

Abstract

The high-temperature acetone hydrogenation at atmospheric pressure over alumina and titania-supported nickel and cobalt catalysts has been studied. The results obtained during characterization have shown that the preparation steps produced a significant metal—support interaction in the alumina-supported precursors. On the other hand, the high-temperature (500°C) reduced titania-supported catalysts showed catalytic properties which resemble in some aspects those ascribed to the SMSI state. An interesting effect of the previous H2 reduction temperature on the acetone hydrogenation selectivity has been found. 2-Propanol and methyl isobutyl ketone (MIBK) were the main reaction products. The MIBK selectivity of the alumina-supported catalysts decreased as the temperature of reduction was increased. However, whereas the low-temperature (300°C) reduced titania-supported catalysts did not give any MIBK, a remarkable activity to this product was developed when the temperature of reduction was increased to 500°C. The effect of the temperature of reduction on selectivity has been tentatively explained according to a general model which relates the activation of the carbonyl functional group with specific sites created at the metal—support interface under conditions favourable to the establishment of significant metal—support interactions.

查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
还原温度对丙酮和氢在氧化铝和二氧化钛负载镍钴催化剂上高温反应选择性的影响
研究了氧化铝和钛载镍钴催化剂在常压下的高温丙酮加氢反应。表征过程中获得的结果表明,制备步骤在氧化铝负载的前驱体中产生了显著的金属支撑相互作用。另一方面,高温(500℃)还原钛负载催化剂的催化性能在某些方面与SMSI态相似。之前的H2还原温度对丙酮加氢选择性有一个有趣的影响。2-丙醇和甲基异丁基酮(MIBK)是主要反应产物。氧化铝负载催化剂的MIBK选择性随还原温度的升高而降低。然而,低温(300°C)还原钛负载催化剂不产生任何MIBK,当还原温度提高到500°C时,该产物具有显著的活性。还原温度对选择性的影响已根据一个通用模型进行了初步解释,该模型将羰基官能团的活化与金属-载体界面上产生的特定位点联系起来,该条件有利于建立重要的金属-载体相互作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 去求助
来源期刊
分子催化
分子催化 Chemical Engineering-Catalysis
CiteScore
1.50
自引率
0.00%
发文量
2959
期刊介绍:
期刊最新文献
Author index Subject index Hydrolysis of sucrose by dealuminated Y-zeolites Synthesis and application of organophilic polystyrene-montmorillonite supported onium salts in organic reactions Effect of the reduction temperature on the selectivity of the high temperature reaction of acetone and hydrogen over alumina and titania supported nickel and cobalt catalysts
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1