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Measurement of the Influence of the Microstructure of Alumina‐Supported Cobalt Catalysts on their Activity and Selectivity in Fischer–Tropsch Synthesis by using Steady‐State and Transient Kinetics

机译:用稳态和瞬态动力学测量氧化铝 - 负载钴催化剂微观结构对其活性和选择性的影响

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Abstract > Five alumina‐supported Co catalysts with different particle sizes and structures were synthesized. The catalysts showed different activities during long‐term Fischer–Tropsch experiments. Steady‐state isotopic transient kinetic analysis (SSITKA) 12 CO/H <sub>2</sub> → 13 CO/H <sub>2</sub> experiments were performed during these long‐term runs. The number of active sites for CO adsorption and activation was estimated through the summation of all surface intermediates derived from the SSITKA results. Rather than comparing turnover frequencies, a kinetic analysis was performed. A simple kinetic rate equation based on the in?situ number of active sites described the steady‐state CO conversion over the five catalysts adequately. Thus the difference in the catalytic performance could not be attributed to a difference in particle size, phase orientation (face‐centered cubic or hexagonal close packed), or Pt‐promotion effect but instead was only because of the number of reduced Co atoms exposed during the reaction. Similarly, the selectivity depended on the CO conversion level and temperature and not on the catalyst structure. </abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> <div class="translation abstracttxt"> <span class="zhankaihshouqi fivelineshidden" id="abstract"> <span>机译:</span><Abstract Type =“Main”XML:Lang =“en”> <标题类型=“main”>抽象</ title> > 合成了具有不同颗粒尺寸和结构的五种氧化铝支持的CO催化剂。催化剂在长期Fischer-Tropsch实验中显示出不同的活性。稳态同位素瞬态动力学分析(Ssitka) 12 </ sup> CO / H. <sub> 2 </ sub> → 13 </ sup> CO / H. <sub> 2 </ sub> 在这些长期运行期间进行实验。通过衍生自Ssitka结果的所有表面中间体的总和估计CO吸附和激活的活性位点数。进行了动力学分析而不是比较营业额频率。基于IN的简单的动力速率方程是充分描述了5催化剂的稳态CO转化。因此,催化性能的差异不能归因于粒度,相位取向(面为中心的立方体或六边形关闭填充)或PT-促进效果的差异,而是仅仅是因为在曝光期间暴露的减少的CO原子的数量反应。类似地,选择性取决于CO转化水平和温度而不是催化剂结构。 </ p> </摘要> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> </div> <div class="record"> <h2 class="all_title" id="enpatent33" >著录项</h2> <ul> <li> <span class="lefttit">来源</span> <div style="width: 86%;vertical-align: text-top;display: inline-block;"> <a href='/journal-foreign-16041/'>《ChemCatChem》</a> <b style="margin: 0 2px;">|</b><span>2017年第12期</span><b style="margin: 0 2px;">|</b><span>共8页</span> </div> </li> <li> <div class="author"> <span class="lefttit">作者</span> <p id="fAuthorthree" class="threelineshidden zhankaihshouqi"> </p> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zkzz" style="display: none;">展开▼</span> </div> </li> <li> <div style="display: flex;"> <span class="lefttit">作者单位</span> <div style="position: relative;margin-left: 3px;max-width: 639px;"> <div class="threelineshidden zhankaihshouqi" id="fOrgthree"> </div> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zhdw" style="display: none;">展开▼</span> </div> </div> </li> <li > <span class="lefttit">收录信息</span> <span style="width: 86%;vertical-align: text-top;display: inline-block;"></span> </li> <li> <span class="lefttit">原文格式</span> <span>PDF</span> </li> <li> <span class="lefttit">正文语种</span> <span>eng</span> </li> <li> <span class="lefttit">中图分类</span> <span><a href="https://www.zhangqiaokeyan.com/clc/1186.html" title="物理化学(理论化学)、化学物理学">物理化学(理论化学)、化学物理学;</a></span> </li> <li class="antistop"> <span class="lefttit">关键词</span> <p style="width: 86%;vertical-align: text-top;"> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=heterogeneous catalysis&option=203" rel="nofollow">heterogeneous catalysis;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=hydrocarbons&option=203" rel="nofollow">hydrocarbons;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=cobalt&option=203" rel="nofollow">cobalt;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=kinetics&option=203" rel="nofollow">kinetics;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=supported catalysts&option=203" rel="nofollow">supported catalysts;</a> </p> <div class="translation"> 机译:异质催化;碳氢化合物;钴;动力学;支持的催化剂; 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href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=孙桂大&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">,孙桂大</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=李凤艳&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">,李凤艳</a> <span> <a href="/journal-cn-9180/" target="_blank" rel="nofollow" class="tuijian_authcolor"> . 燃料化学学报 </a> </span> <span> . 2008</span><span>,第002期</span> </span> </div> </li> <li> <div> <b>6. </b><a class="enjiyixqcontent" href="/academic-conference-cn_meeting-26753_thesis/020221695991.html">介孔氧化硅负载型氧化钴催化剂的合成、表征及对苯的催化完全氧化活性</a> <b>[C]</b> <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=李进军&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor"> . 李进军</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=许秀艳&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">,许秀艳</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=郝郑平&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">,郝郑平</a> <span> <a href="/conference-cn-26753/" target="_blank" rel="nofollow" class="tuijian_authcolor"> . 第四届全国环境催化与环境材料学术会议 </a> <span> <span> . 2005</span> </span> </div> </li> <li> <div> <b>7. </b><a class="enjiyixqcontent" href="/academic-degree-domestic_mphd_thesis/020312542065.html">锌的添加对氧化铝负载的钴催化剂结构及费—托合成性能的影响</a> <b>[A] </b> <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=颜俊琨&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor"> . 颜俊琨</a> <span> . 2013</span> </span> </div> </li> </ul> <ul style="display: none;"> <li> <div> <b>1. </b><a class="enjiyixqcontent" href="/patent-detail/061203150276.html">一种氧化铝负载钴催化剂及制法和在费托合成的应用</a> <b>[P]</b> . <span> 中国专利: CN105344356B </span> <span> . 2019.01.04</span> </div> </li> <li> <div> <b>2. </b><a class="enjiyixqcontent" href="/patent-detail/06120107824330.html">一种氧化铝负载钴催化剂及制法和在费托合成的应用</a> <b>[P]</b> . <span> 中国专利: CN105344356A </span> <span> . 2016-02-24</span> </div> </li> <li> <div> <b>3. </b><a class="enjiyixqcontent" href="/patent-detail/06130420382957.html">Catalyst of cobalt supported on alumina having improved stability and a high activity for the synthesis of Fischer Tropsch synthesis, and method of Fischer Tropsch hydrocarbon</a> <b>[P]</b> . <span> 外国专利: <!-- --> BR0109337B1 </span> <span> . 2013-10-29</span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译:具有改善的稳定性和高活性的负载在氧化铝上的钴催化剂用于费-托合成以及费-托烃的合成方法 </span> </p> </li> <li> <div> <b>4. </b><a class="enjiyixqcontent" href="/patent-detail/06130419336261.html">Iron-cobalt catalyst, manufacturing method same and method for obtaining water-gas shift reaction activity and for highly selective liquid fuel production in 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