负载型Fe-Ni纳米合金的制备及其催化丁二烯选择性加氢性能
Synthesis and Catalytic Activity of Supported Fe-Ni Nano-Alloys for Butadiene Selective Hydrogenation
严永情 1王朝 1刘思明 1连天 1王伟豪 1金顺敬 2陈丽华 1苏宝连3
作者信息
- 1. 武汉理工大学材料复合新技术国家重点实验室,湖北武汉 430070
- 2. 襄阳职业技术学院,湖北襄阳 441050
- 3. 武汉理工大学材料复合新技术国家重点实验室,湖北武汉 430070;那慕尔大学无机材料化学实验室,那慕尔B-5000,比利时
- 折叠
摘要
采用尿素沉积-沉淀法制备了负载型Fe-Ni纳米合金催化剂,通过调变Fe/Ni摩尔比,研究了金属组分对其还原温度、合金结构及催化丁二烯选择性加氢性能的影响.结果表明:Fe-Ni复合能有效降低Fe、Ni单金属催化剂的还原温度;随着Fe摩尔分数由0增加至100％,金属相结构逐渐由面心立方向体心立方结构转变;在催化加氢过程中,Fe的引入降低了 Ni基催化剂活性,但丁烯选择性得到大幅提高;当Fe/Ni摩尔比为25/75时,Fe25Ni75/TiO2-R催化剂中富Ni的Ni3Fe相在丁二烯催化活性(完全转化温度 T100％约95 ℃)和单烯烃选择性(＞93％)最佳.
Abstract
Supported Fe-Ni nano-alloy catalysts were prepared by deposition-precipitation with urea.The impact of Fe-Ni composition on the reduction temperature,alloy structure and selective hydrogenation of butadiene performance were investigated by regulating Fe/Ni molar ratio.The results show that Fe-Ni composition can effectively reduce the reduction temperature of mono-metal catalysts Fe and Ni.As Fe molar fraction increases from 0 to 100％,the structure of metal phase gradually changes from face-centered cubic to body-centered cubic.During catalytic hydrogenation,the introduction of Fe has reduced the activity of Ni-based catalysts,but the selectivity to butenes is greatly improved.When Fe/Ni molar ratio is 25/75,the supported Ni3Fe phase of Ni-rich Fe25Ni75/TiO2-R catalyst exhibits excellent catalytic activity for butadiene(T100％≈95℃)and mono-o lefin selectivity(＞93％).
关键词
非贵金属催化剂/Fe-Ni合金催化剂/丁二烯/选择性加氢/低碳烯烃/活性位点Key words
non-noble metal catalyst/Fe-Ni alloy catalyst/butadiene/selective hydrogenation/light olefin/active site引用本文复制引用
基金项目
国家自然科学基金项目(21902122)
国家博士后科研基金(2019M652723)
国家重点研发计划-政府间合作项目(2021YFE0115800)
出版年
2024
NETL
NSTL
万方数据