High catalytic activity at low temperature in oxidative dehydrogenation of propane with Cr–Al pillared clay

León, María Andrea De; Santos, Carolina De Los; Latrónica, Luis; Cesio, Ana María; Volzone, Cristina; Castiglioni, Jorge; Sergio, Marta

doi:10.1016/j.cej.2013.10.086

Cited by 43 publications

(12 citation statements)

References 52 publications

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“…Ta king theequally importantp roduct ethylene into account, the selectivityf or lighto lefins (ethylene + propylene, C 2-3 = )w as up to 90.9 %, whichw as much higher than thes electivitieso btained over thewell-developedmetal or metaloxide catalystsat ac omparablep ropanec onversionl evel,a sw ella so verc arbon andcarbonaceousmaterials. [4b, 5e, f,7] More significantly, theformation of CO 2 (0.5 %) wasconsiderablylower than fort he traditional ODHp rocesses( 10-60% CO 2 ), [5] demonstratingt he excellent performanceo ft he currentB NOHc atalysti nt he selectivea ctivation of theC ÀHbondinpropane.…”

Section: Resultsmentioning

confidence: 99%

“…[3] Oxidative dehydrogenation (ODH) of propane, catalyzed by transition-metalo xidesa nd alkaline-earth metal oxychlorides, [4] offers an attractive alternative route with the prominentc haracters of free coking and no equilibrium limitation in propane conversion,b ut the selectivityt oward propylene is often lower than in the direct dehydrogenation route, primarily because of overoxidation of the formed propylene to CO 2 (10-60 %). [5] Under the reaction conditions, the formed electron-rich propylene reacted more easily with molecular oxygen overt he metal oxide catalysts, resultingi nt he cleavage of the CÀCb ond through consecutive oxygen insertion and thus formingt he final product, CO 2 .F rom ac hemical point of view,a ni deal catalyst should be highly selective for CÀHb ond cleavage but not for CÀCb ond cleavage under the oxidative dehydrogenation conditions. Unfortunately,t he development of such ah ighly selectivec atalyst is still challenging.…”

Section: Introductionmentioning

confidence: 99%

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Edge‐hydroxylated Boron Nitride for Oxidative Dehydrogenation of Propane to Propylene

et al. 2017

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What prompted you to investigate this topic? The increasing worldwide availability of naturala nd shale gas has stimulated aq uick technical shift to catalytic dehydrogena-tion of propane to propylene (PDH). However,t his technology relies on Pt-or CrO x-basedc atalysts and suffers from thermo-dynamic limitations and rapid catalystd eactivation by coking and sintering. Oxidative dehydrogenation (ODH) of propane offers ap romising alternative to industrialized PDH process, but selectivity control foro lefins is difficult, because of deep-oxidation reactions over conventional metal oxide catalysts that produce as ubstantial amount of undesired CO 2 .H ence, we have dedicated our efforts to the development of at her-mally stable and metal-free ODH catalyst, which can selectively cleave the CÀHb ond while preventing CO 2 formation. As presented in this paper,e dge-hydroxylated boron nitride addresses these issues. What new scientific questions/problems doest his work raise? This work represents af undamental breakthrough in chemistry because non-metallic, inert boron nitride was transformed into ac hemically active and selectivec atalystf or propaneO DH. We have identified the BÀOH groups at the edges of BN as active sites forp ropane ODH. However, aw ell-defined reaction pathway remainsu nclear.F uture studies should focus on theoretical simulations and the captureo fr eaction intermediates to illustrate the reactionm echanism under real reaction conditions.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Edge‐hydroxylated Boron Nitride for Oxidative Dehydrogenation of Propane to Propylene

et al. 2017

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“…Among the new propylene production routes, catalytic dehydrogenation of propane is of increasing importance [1][2][3][4]. Pt-based catalysts attract much attention because of its high catalytic performance and eco-friendly property [5,6].…”

Section: Introductionmentioning

confidence: 99%

Improved catalytic stability of PtSnIn/xCa–Al catalysts for propane dehydrogenation to propylene

Long

Lang

et al. 2014

Chemical Engineering Journal

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“…23 Thus, it is expected that AlCr-PILC as catalyst support would show not only high specific surface area for dispersing the active components, good thermal stability to maintain the high specific surface area during the following calcination, but also display co-catalytic effect in SCR processes due to the existance of Cr with many oxidation states. To date, AlCr-PILC has been used as a catalyst support in the oxidative dehydrogenation of propane and CO oxidation, 24,25 however, to the best of our knowledge, it has never been used as a catalyst support in SCR processes. In this work, several PILC with Al:Cr molar ratios varying from 0:4 to 4:0 were prepared.…”

Section: Introductionmentioning

confidence: 99%

Co-catalytic effect of Al-Cr pillared montmorillonite as a new SCR catalytic support

Chen

Cen

Feng

et al. 2016

J. Chem. Technol. Biotechnol.

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BACKGROUND It is of great interest to use pillared clay (PILC) as a cheap support for a selective catalytic reduction (SCR) catalyst. Al‐Cr pillared clay (AlCr‐PILC) has high thermal stability due to the introduction of polycations of Al. As a support, AlCr‐PILC may show a co‐catalytic effect in SCR processes because chromium oxide itself is an active SCR catalyst. The aim of this work is to investigate the potential of AlCr‐PILC as a new low temperature SCR catalyst support. RESULTS A series of AlCr‐PILC with Al:Cr molar ratio varying from 0:4 to 4:0 were successfully synthesized to support manganese and cerium active phase. MnCe/AlCr(2:2)‐PILC exhibited the highest NOx conversion close to 100% at 200–300 °C, and more than 90% N2 selectively over a wide temperature window of 140–300 °C. The catalytic activity of MnCe/AlCr‐PILC in terms of both NOx conversion and N2 selectivity is much higher than those of MnCe/Al‐PILC, MnCe/Cr‐PILC, AlCr‐PILC, and the simple mixed MnCeAlCr, indicating the co‐catalytic effect of AlCr‐PILC support. CONCLUSION AlCr‐PILC is a very promising low‐temperature SCR catalyst support. The XRD, XPS, and H2‐TPR measurements prove that the co‐catalytic effect of AlCr‐PILC occurred via the strong interaction between MnCe and the AlCr‐PILC support. © 2016 Society of Chemical Industry

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High catalytic activity at low temperature in oxidative dehydrogenation of propane with Cr–Al pillared clay

Cited by 43 publications

References 52 publications

Edge‐hydroxylated Boron Nitride for Oxidative Dehydrogenation of Propane to Propylene

Edge‐hydroxylated Boron Nitride for Oxidative Dehydrogenation of Propane to Propylene

Improved catalytic stability of PtSnIn/xCa–Al catalysts for propane dehydrogenation to propylene

Co-catalytic effect of Al-Cr pillared montmorillonite as a new SCR catalytic support

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