已入深夜,您辛苦了!由于当前在线用户较少,发布求助请尽量完整地填写文献信息,科研通机器人24小时在线,伴您度过漫漫科研夜!祝你早点完成任务,早点休息,好梦!

Importance of pore size and Lewis acidity of Pt/Al2O3 for mitigating mass transfer limitation and catalyst fouling in triglyceride deoxygenation

除氧 化学 催化作用 介孔材料 结垢 加氢脱硫 路易斯酸 焦炭 化学工程 无机化学 有机化学 工程类 生物化学
作者
Myungwon Oh,Mingyu Jin,Kyungho Lee,Jeong‐Chul Kim,Ryong Ryoo,Minkee Choi
出处
期刊:Chemical Engineering Journal [Elsevier BV]
卷期号:439: 135530-135530 被引量:20
标识
DOI:10.1016/j.cej.2022.135530
摘要

The deoxygenation of triglycerides via hydrotreating is a promising route for producing hydrocarbon fuels from renewable biomass. Because triglycerides are bulky esters possessing multiple C=C bonds, mass transfer limitation and coke deposition within the pore space of catalysts are significant problems. In this study, the catalytic effects of porous structure and surface acidity of Pt/Al2O3 were rigorously investigated in triglyceride deoxygenation. Pt was supported on a series of Al2O3 materials with various crystal structures (γ, θ, and α), pore sizes (3.3–28.6 nm), and Lewis acid amounts (0–337 µmol g−1), which were prepared by sol–gel synthesis. The γ- and θ-Al2O3 phases containing appreciable pentacoordinated Al sites effectively stabilized highly dispersed Pt particles (1.3–1.5 nm) via strong metal-support interactions and exhibited high catalytic activities. Conversely, Pt on α-Al2O3 without pentacoordinated Al sites exhibited very poor dispersion (> 12.6 nm), resulting in low catalytic activity. The results also showed that large mesopores (pore diameter > ∼12 nm) were essential to obtain maximum catalytic activity without mass transfer limitation and to suppress catalyst deactivation by fouling. When comparing the γ- and θ-Al2O3 phases, the latter generally showed inhibited formation of heavy products and coke owing to its larger pore size and smaller amount of Lewis acid sites that can catalyze undesirable oligomerization of unsaturated fatty acids. Consequently, Pt on θ-Al2O3 with extra-large mesopores (pore diameter: 28.6 nm) simultaneously exhibited the highest deoxygenation activity, selectivity toward diesel-range paraffins, and long-term stability.
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
孙文杰完成签到 ,获得积分10
2秒前
小学生的练习簿完成签到,获得积分0
5秒前
热心市民小红花应助morena采纳,获得10
5秒前
6秒前
淡定海亦发布了新的文献求助10
6秒前
7秒前
7秒前
黎乐荷发布了新的文献求助10
10秒前
wuhao88完成签到 ,获得积分10
10秒前
共享精神应助淡定海亦采纳,获得10
13秒前
13秒前
白云垛完成签到,获得积分10
13秒前
科目三应助wildeager采纳,获得10
14秒前
minya完成签到,获得积分10
14秒前
英俊的铭应助葛力采纳,获得10
17秒前
Ling完成签到 ,获得积分10
18秒前
18秒前
万能图书馆应助sopha采纳,获得50
19秒前
23秒前
29秒前
32秒前
33秒前
淡然绝山发布了新的文献求助10
34秒前
34秒前
峰feng完成签到 ,获得积分10
35秒前
36秒前
不摇碧莲完成签到 ,获得积分10
38秒前
希希完成签到 ,获得积分10
41秒前
Zbre完成签到,获得积分10
42秒前
桐桐应助人间打气筒采纳,获得10
51秒前
53秒前
搜集达人应助科研通管家采纳,获得10
55秒前
大模型应助科研通管家采纳,获得20
55秒前
科研通AI2S应助科研通管家采纳,获得10
55秒前
55秒前
上官若男应助科研通管家采纳,获得30
55秒前
monster0101完成签到 ,获得积分10
59秒前
59秒前
酷炫的一笑完成签到,获得积分10
1分钟前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
基于可调谐半导体激光吸收光谱技术泄漏气体检测系统的研究 350
Robot-supported joining of reinforcement textiles with one-sided sewing heads 320
Aktuelle Entwicklungen in der linguistischen Forschung 300
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 3989949
求助须知:如何正确求助?哪些是违规求助? 3532017
关于积分的说明 11255865
捐赠科研通 3270829
什么是DOI,文献DOI怎么找? 1805053
邀请新用户注册赠送积分活动 882233
科研通“疑难数据库(出版商)”最低求助积分说明 809216