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首页> 外文期刊>Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications >Cumene cracking activity and enhanced regeneration of FCC catalysts comprising HY-zeolite and LaBO3 (B = Co, Mn, and Fe) perovskites
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Cumene cracking activity and enhanced regeneration of FCC catalysts comprising HY-zeolite and LaBO3 (B = Co, Mn, and Fe) perovskites

机译：含HY沸石和LaBO3（B = Co，Mn和Fe）钙钛矿的FCC催化剂的异丙苯裂解活性和增强的再生

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摘要

The effects of LaBO3 (B = Co, Mn, Fe) perovskites physically mixed with HY-zeolite (Y), denoted as LBO-Y binary catalysts, on both cumene cracking and the catalysts regeneration were studied. All the catalysts exhibit more than 82% cumene conversion and their activities decrease in the order of Y-zeolite>LCoO-Y>LFeO-Y>LMnO-Y. During cumene cracking, the perovskites are reduced leading to increase in dehydrogenation coking and oxidation of a portion of the carbon content of the feed into carbon oxides. As compared to the Y-zeolite with no promoter, a decline of about 8.3% and increase of around 75.0 and 83.3% in coke formation are observed for LMnO-Y, LCoO-Y and LFeO-Y, respectively. Furthermore, the addition of LCoO, LFeO and LMnO to the Y-zeolite lowers the ratio of CO evolution per deposited carbon in the coked catalysts regeneration by about 91,48 and 34%, respectively. Finally, among the screened perovskites, LMnO exhibits both the lowest coke formation tendency and a considerable CO oxidation activity, thus it is a potential additive to fluid catalytic cracking catalysts.
机译：研究了将LaBO3（B = Co，Mn，Fe）钙钛矿与HY沸石（Y）物理混合（称为LBO-Y二元催化剂）对枯烯裂化和催化剂再生的影响。所有催化剂均表现出超过82％的枯烯转化率，并且其活性以Y-沸石> LCoO-Y> LFeO-Y> LMnO-Y的顺序降低。在异丙苯裂化期间，钙钛矿被还原，导致脱氢焦化的增加以及进料的一部分碳含量的氧化为碳氧化物。与没有助催化剂的Y型沸石相比，LMnO-Y，LCoO-Y和LFeO-Y的焦炭形成分别下降了约8.3％和约75.0％和83.3％。此外，向Y型沸石中添加LCoO，LFeO和LMnO可分别降低焦化催化剂再生中每沉积碳的CO放出率约91.48和34％。最后，在经筛选的钙钛矿中，LMnO既表现出最低的焦炭形成趋势，又具有显着的CO氧化活性，因此它是流化催化裂化催化剂的潜在添加剂。

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