亲爱的研友该休息了!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!身体可是革命的本钱,早点休息,好梦!

Dry reforming of methane on Ni-Fe-MgO catalysts: Influence of Fe on carbon-resistant property and kinetics

甲烷 焦炭 催化作用 二氧化碳重整 高分辨率透射电子显微镜 碳纤维 材料科学 合金 化学工程 化学 无机化学 冶金 合成气 纳米技术 有机化学 透射电子显微镜 复合材料 复合数 工程类
作者
Tingting Zhang,Zhongxian Liu,Yi‐An Zhu,Zhicheng Liu,Zhi‐Jun Sui,Kake Zhu,Xinggui Zhou
出处
期刊:Applied Catalysis B-environmental [Elsevier BV]
卷期号:264: 118497-118497 被引量:164
标识
DOI:10.1016/j.apcatb.2019.118497
摘要

Abstract Dry reforming of methane (DRM) converts two major greenhouse gases into syngas, a versatile chemical feedstock, requiring the identification of a robust catalyst. In this contribution, we explored the promoting effect of Fe in MgO supported Ni-Fe alloy catalysts in DRM. Towards this end, a series of catalysts with varied Fe/(Ni+Fe) ratios (0 to 0.17) and homogeneous metal distribution were prepared from a single FexNiyMg1-x-y(OH)2 (x = 0.00–0.07, y = 0.00–0.07) precursor derived from solvothermal synthesis. Catalytic evaluations at 760 °C and 800 °C showed that Fe passivated the activity of Ni surface while promoting the coke-tolerant property. Structural evolution and coke deposition of catalysts were extensively characterized by using XRD, SEM, TEM, HAADF-HRTEM, H2-TPR, CO2 (O2)-TGA and CO2-TPO techniques, manifesting that alloying of Fe with Ni had enhanced catalyst stability. Lowered amount of coke was found on spent Ni-Fe alloy catalysts with respect to pristine Ni catalyst, and Fe also changed the type of surface carbon from a refractory type to a soft one that can be readily gasified by CO2. Fe also increased the surface oxyphilicity of alloy particle surface via balancing the otherwise carbon affinity of Ni surface. Optimized catalytic performance was attained by FexNi0.07-xMg0.93O-R (x = 0.003–0.006) catalyst. Kinetic studies and coke gasification kinetic disclosed that Fe slowed down coke deposition rate and concomitantly accelerated surface coke gasification rate, without changing the essential reaction mechanism or kinetic features of pristine Ni catalyst. The promoting effect of Fe was found to be highly dependent on CO2 contents in the contacting atmosphere, as well as Fe/Ni ratios in the alloy. The stability of Ni-Fe alloy catalyst in DRM can be ascribed to combined effects from both ensemble size reduction and surface oxyphilicity change. The role Fe plays in enhancing DRM coke-resistant property is potentially useful for alike reforming catalyst and process design.
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
Ava应助明亮猫咪采纳,获得10
1秒前
kdjm688完成签到,获得积分10
3秒前
上官若男应助啦某某采纳,获得10
7秒前
汉堡包应助科研通管家采纳,获得10
10秒前
慕青应助科研通管家采纳,获得10
10秒前
科研通AI2S应助科研通管家采纳,获得10
10秒前
10秒前
15秒前
啦某某发布了新的文献求助10
20秒前
好好好完成签到,获得积分10
21秒前
丿夜幕灬降临丨完成签到,获得积分10
29秒前
量子星尘发布了新的文献求助10
32秒前
不羁完成签到 ,获得积分10
42秒前
43秒前
GingerF应助小新爱看文献采纳,获得50
45秒前
49秒前
Aurora完成签到 ,获得积分10
50秒前
Hello应助hsr_eye采纳,获得10
54秒前
123发布了新的文献求助10
1分钟前
linshunan完成签到 ,获得积分10
1分钟前
就叫希望吧完成签到 ,获得积分10
1分钟前
mhq完成签到 ,获得积分20
1分钟前
量子星尘发布了新的文献求助10
1分钟前
1分钟前
吴嘉俊完成签到 ,获得积分10
1分钟前
Joeswith完成签到,获得积分10
1分钟前
杨怂怂完成签到 ,获得积分10
1分钟前
风雨中飘摇应助科研通管家采纳,获得200
2分钟前
2分钟前
Chris完成签到 ,获得积分0
2分钟前
zoe完成签到 ,获得积分10
2分钟前
2分钟前
2分钟前
大个应助CNS_Fighter88采纳,获得10
2分钟前
轻松的惜芹完成签到,获得积分10
2分钟前
howgoods完成签到 ,获得积分10
2分钟前
2分钟前
Kashing完成签到,获得积分10
2分钟前
CNS_Fighter88发布了新的文献求助10
2分钟前
2分钟前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 700
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
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 3976608
求助须知:如何正确求助?哪些是违规求助? 3520700
关于积分的说明 11204542
捐赠科研通 3257350
什么是DOI,文献DOI怎么找? 1798716
邀请新用户注册赠送积分活动 877881
科研通“疑难数据库(出版商)”最低求助积分说明 806613