Ethanol conversion into 1,3-butadiene over a mixed Hf-Zn catalyst: Effect of reaction conditions and water content in ethanol

乙醇 催化作用 1,3-丁二烯 化学 核化学 乙醇含量 无机化学 有机化学
作者
G.M. Cabello González,Patricia Concepción,A.L. Villanueva Perales,Agustı́n Martı́nez,M. Campoy,F. Vidal-Barrero
出处
期刊:Fuel Processing Technology [Elsevier BV]
卷期号:193: 263-272 被引量:41
标识
DOI:10.1016/j.fuproc.2019.04.036
摘要

Assessment of catalyst performance is necessary for process design in order to evaluate the effect of reaction conditions on process economics and configuration.In this work, the combined effect of reaction conditions and quality of feedstock (i.e.water content) on the performance of a Hf-Zn catalyst, prepared by physically mixing the zinc silicate hemimorphite and HfO2/SiO2, for the conversion of ethanol to 1,3-butadiene is investigated.To this aim, an experimental design was performed with temperature, space velocity, and water content in ethanol as factors.In situ IR spectroscopy unambiguously indicates that the presence of water in the ethanol feed induces the generation of new Brønsted acid sites, most probably by reaction of Zn 2+ -related Lewis acid sites with water, and thus modifies the Brønsted-Lewis acid site balance in the catalyst.This fact results in (i) higher selectivity to dehydration products catalyzed by Brønsted acid sites, and (ii) lower ethanol conversion as some Zn 2+ Lewis acid sites, active for the dehydrogenation of ethanol, are transformed into Brønsted acid sites.In addition, higher acetaldehyde yield is observed in experiments feeding hydrous ethanol, indicating that water inhibits aldol condensation reactions to a larger degree than ethanol dehydrogenation.This effect is particularly beneficial at a high operating temperature, where acetaldehyde is so reactive that it is rapidly converted to heavy compounds unless water is present.Therefore, the benefits of water in ethanol under such reacting conditions should lead to savings in operating costs for the energyintensive removal of water from ethanol and the use of a cheaper ethanol feedstock with high water content.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
刚刚
2秒前
Gilana完成签到,获得积分10
2秒前
xyh发布了新的文献求助10
2秒前
江璃完成签到,获得积分10
3秒前
TT发布了新的文献求助10
3秒前
美梦成真完成签到,获得积分10
4秒前
Gakay完成签到,获得积分10
4秒前
量子星尘发布了新的文献求助10
5秒前
szj完成签到,获得积分0
6秒前
旦皋完成签到,获得积分10
6秒前
赘婿应助花壳在逃野猪采纳,获得10
7秒前
卷卷完成签到,获得积分10
9秒前
JSY完成签到 ,获得积分20
9秒前
xyh完成签到,获得积分10
10秒前
小曾应助Florencia采纳,获得10
11秒前
神外王001完成签到 ,获得积分10
11秒前
16秒前
你是谁完成签到,获得积分10
17秒前
majf完成签到,获得积分10
18秒前
linhanwenzhou完成签到,获得积分10
18秒前
JSY关注了科研通微信公众号
18秒前
853225598完成签到,获得积分10
18秒前
798完成签到,获得积分10
19秒前
善学以致用应助董怼怼采纳,获得10
19秒前
妍儿完成签到,获得积分20
20秒前
隐形曼青应助高大的水壶采纳,获得10
20秒前
马哥二弟无敌完成签到 ,获得积分10
21秒前
22秒前
Florencia完成签到,获得积分10
22秒前
务实颜完成签到 ,获得积分10
22秒前
22秒前
amberzyc应助小远采纳,获得10
23秒前
23秒前
24秒前
24秒前
25秒前
25秒前
Rondab应助小猪采纳,获得30
25秒前
DLDL完成签到,获得积分10
25秒前
高分求助中
【提示信息,请勿应助】关于scihub 10000
Les Mantodea de Guyane: Insecta, Polyneoptera [The Mantids of French Guiana] 3000
徐淮辽南地区新元古代叠层石及生物地层 3000
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
Handbook of Industrial Diamonds.Vol2 1100
Global Eyelash Assessment scale (GEA) 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 550
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 4038368
求助须知:如何正确求助?哪些是违规求助? 3576068
关于积分的说明 11374313
捐赠科研通 3305780
什么是DOI,文献DOI怎么找? 1819322
邀请新用户注册赠送积分活动 892672
科研通“疑难数据库(出版商)”最低求助积分说明 815029