限域于水滑石层板内的Sn(Ⅳ)诱导制备高分散的Pt催化剂及其催化重整性能研究
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- 英文论文题名：Highly dispersed Pt induced by the Sn(Ⅳ) sites confined in LDH lattice for catalytic reforming
- 论文作者：朱彦儒 ; 安哲 ; 宋红艳 ; 何静
- 英文论文作者：Yanru Zhu ; Zhe An ; Hngyan Song ; Jing He ; State Key Laboratory of Chemical Resource Engineering ; Beijing University of Chemical Technology
- 年：2016
- 作者机构：北京化工大学化工资源有效利用国家重点实验室;
- 论文关键词：催化重整 ; 类水滑石化合物 ; 单原子 ; 抑制氢解
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第十五分会：表界面结构调控与催化
- 语种：中文
- 分类号：TE624.42;O643.36
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第十五分会 ; 表界面结构调控与催化
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：306k
- 原文格式：D
- 会议级别：全国
摘要
催化重整是原油二次加工结构调整和产品升级的核心技术之一。工业上Pt催化剂面临着主要由氢解引起的选择性不高的问题,高分散的Pt中心有利于抑制氢解副反应[1],提高异构、环化选择性[1]。本工作利用水滑石层板上原子级均匀分布的Sn(IV)诱导负载制备了高分散Pt催化剂(图1a),Pt分散度为96%,单原子和小于10个Pt原子组成的原子簇占91%。相比之下,Pt Sn直接负载在Mg Al-LDH/Al_2O_3和Al_2O_3上制得的催化剂,分散度分别为85%和80%,单原子和小Pt簇比例分别为62%和41%。在正庚烷重整反应中,高分散的Pt催化剂有效地抑制了氢解并明显提高了代表环化能力的C7产物选择性(图1b和图1c)。
Conventional supported Pt for industrially catalytic reforming suffers low selectivity due to hydrogenolysis reaction.The development of highly dispersed Pt offers the opportunities for settling this problem [1].Herein,a supported Pt,with Pt dispersed in single atoms plus small clusters with fewer than 10 atoms(91%) on Sn-containing mixed metal oxides,was prepared by the inducement of Sn component confined in the lattices of brucite-like layers of layered double hydroxides(LDHs)(Fig.1a).The highly dispersed Pt effectively inhibited the hydrogenolysis and significantly improved the selectivity to cyclization products in the n-heptane reforming reaction(Fig.1b and c).
Conventional supported Pt for industrially catalytic reforming suffers low selectivity due to hydrogenolysis reaction.The development of highly dispersed Pt offers the opportunities for settling this problem [1].Herein,a supported Pt,with Pt dispersed in single atoms plus small clusters with fewer than 10 atoms(91%) on Sn-containing mixed metal oxides,was prepared by the inducement of Sn component confined in the lattices of brucite-like layers of layered double hydroxides(LDHs)(Fig.1a).The highly dispersed Pt effectively inhibited the hydrogenolysis and significantly improved the selectivity to cyclization products in the n-heptane reforming reaction(Fig.1b and c).
引文
[1]Flaherty,D.W.;Iglesia,E.J.Am.Chem.Soc.2013,135:18586.