Methanol to olefins over H-RUB-13 zeolite: regulation of framework aluminum siting and acid density and their relationship to the catalytic performance

Zhang, Li; Wang, Sen; Shi, Dezhi; Qin, Zhangfeng; Wang, Pengfei; Wang, Guofu; Li, Junfen; Dong, Mei; Fan, Weibin; Wang, Jianguo

doi:10.1039/c9cy02419k

Cited by 28 publications

(12 citation statements)

References 68 publications

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“…At the time, the Davis group was working on understanding the atomic arrangements in SAPOs [18,19], and during discussions with Dr. Kaiser, reviewed the initial MTO data on SAPO-34. Since then, the MTO reaction has been investigated on many types of molecular sieves including zeolites, and the mechanistic understanding of the reaction has evolved quite considerably [20][21][22][23][24][25][26][27][28][29][30]. Our groups' work with the MTO reaction has fundamentally focused on understanding how small-pore, cage-containing molecular sieve structures influence the light olefin product distributions [31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Methanol-to-olefins catalysis on ERI-type molecular sieves: towards enhancing ethylene selectivity

Alshafei

Park

Zones

et al. 2021

Journal of Catalysis

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Section: Introductionmentioning

confidence: 99%

Methanol-to-olefins catalysis on ERI-type molecular sieves: towards enhancing ethylene selectivity

Alshafei

Park

Zones

et al. 2021

Journal of Catalysis

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“…Different zeolite topologies can induce various spatial confinement effects, strongly affecting the HCP intermediates and reaction routes, and thus the product selectivity. [ 129 ] A suitable topology is crucial to maximizing the yield of the desired products during MTO reaction. Small‐pore zeolites with 8‐MR pore openings, such as SAPO‐34 ( CHA ), RUB‐13 ( RTH ), SAPO‐18 ( AEI ), and SAPO‐35 ( LEV ), have apparent superiority for light olefins production in MTO process.…”

Section: Ch3oh Conversion Over Zeolite‐based Catalystsmentioning

confidence: 99%

“…Small‐pore zeolites with 8‐MR pore openings, such as SAPO‐34 ( CHA ), RUB‐13 ( RTH ), SAPO‐18 ( AEI ), and SAPO‐35 ( LEV ), have apparent superiority for light olefins production in MTO process. [ 129a ] The narrow 8‐MR pore openings hinder the transfer of large HCP intermediate species, making light olefins (especially ethylene and propylene) the main products. [ 130 ] In contrast, medium‐pore zeolites with 10‐MR pore openings, such as ZSM‐5 ( MFI ) and ZSM‐48 (* MRE ), offer less stringent space limitation and favor increased selectivity toward propylene.…”

Section: Ch3oh Conversion Over Zeolite‐based Catalystsmentioning

confidence: 99%

Applications of Zeolites to C1 Chemistry: Recent Advances, Challenges, and Opportunities

2020

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However, due to growing concerns regarding crude oil depletion and increasing environmental requirements, finding abundant fossil hydrocarbons with high H 2 /C ratios as well as alternative carbon resources has become crucial to maintaining sustainable, environmentally benign systems that can aid human development. [2] Thus, one-carbon (C1) chemistry, which is the chemistry of C1 molecules that can be derived from sources other than fossil hydrocarbons, including carbon monoxide (CO), carbon dioxide (CO 2), methane (CH 4), methanol (CH 3 OH), and formic acid (HCOOH), has emerged and plays important roles in the energy supply and high-value chemical preparation. [1,3] These C1 resources can be obtained from natural gas, shale gas, coal, biomass, solid wastes, and CO 2 emissions. [3a,4] Extensive studies have been dedicated to the catalytic conversion of C1 molecules, including production of dimethyl ether (DME) and liquid fuels from syngas (a mixture of CO and H 2); production of methanol, light olefins, and even aromatics from CH 4 ; and production of hydrogen from HCOOH. [5] All of these transformations require metallic catalytic species such as single atoms; clusters; or oxides, carbides, or alloy particles (e.g., Rh-, AuPd-, Fe 3 O 4-, and Fe 5 C 2-based catalysts). However, these isolated metallic species suffer from severe sintering due to a lack of confinement effects from supports, which leads to poor catalytic stability and decreased selectivities toward their target products. The efficient production of a specific range of hydrocarbons or oxygenates remains a difficult scientific and technical challenge. Overcoming product selectivity limitations and improving catalyst stabilities via catalyst designs are important areas of research. Zeolites are an important class of shape-selective catalysts with uniform micropores, tunable acidities, and high thermal and hydrothermal stabilities. Over the past decade, they have gained broad popularity and been applied to various industrially important catalytic processes. [6] In particular, the design and development of zeolite-based mono-, bi-, and multifunctional catalysts that combine the advantages of zeolites with those of metallic catalytic species have boosted the application of zeolites to C1 chemistry. As shown in Figure 1, value-added hydrocarbons and oxygenates can be produced from C1 molecules via various catalytic routes over zeolite-based catalysts. By May of 2020, the Structure Commission of the International C1 chemistry, which is the catalytic transformation of C1 molecules including CO, CO 2 , CH 4 , CH 3 OH, and HCOOH, plays an important role in providing energy and chemical supplies while meeting environmental requirements. Zeolites are highly efficient solid catalysts used in the chemical industry. The design and development of zeolite-based mono-, bi-, and multifunctional catalysts has led to a booming application of zeolite-based catalysts to C1 chemistry. Combining the advantages of zeolites and metallic catalytic species has promoted the catal...

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“…SAPO-34 (CHA-type in the three-letter code of the International Zeolite Association Structure Commission) and ZSM-5 (MFI-type) zeolites have been commercially used to yield propene in the MTO reaction. 5 Recently, catalytic activities of RUB-13 (RTH-type) 12 and MCM-22 (MWW-type) 13 zeolites in the MTO reaction have been examined. However, such zeolites containing small- (8-membered rings, 8R) or medium- (10R) sized pores do not favour a high production selectivity toward C 3 –C 4 species.…”

Section: Introductionmentioning

confidence: 99%

Robust CON-type zeolite nanocatalyst in methanol-to-olefins reaction: downsizing, recrystallisation and defect-healing treatments toward prolonged lifetime

et al. 2022

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Methanol to olefins over H-RUB-13 zeolite: regulation of framework aluminum siting and acid density and their relationship to the catalytic performance

Abstract: Incorporating boron promotes siting of more aluminum atoms at the sites accessible to MTO and then enhances the catalytic performance of H-RUB-13 in MTO.

Cited by 28 publications

References 68 publications

Methanol-to-olefins catalysis on ERI-type molecular sieves: towards enhancing ethylene selectivity

Methanol-to-olefins catalysis on ERI-type molecular sieves: towards enhancing ethylene selectivity

Applications of Zeolites to C1 Chemistry: Recent Advances, Challenges, and Opportunities

Robust CON-type zeolite nanocatalyst in methanol-to-olefins reaction: downsizing, recrystallisation and defect-healing treatments toward prolonged lifetime

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