Creation of gallium acid and platinum metal sites in bifunctional zeolite hydroisomerization and hydrocracking catalysts by atomic layer deposition

Geerts, Lisa; Ramachandran, Ranjith Karuparambil; Dendooven, Jolien; Radhakrishnan, Sambhu; Seo, Jin Won; Detavernier, Christophe; Martens, Johan A.; Sree, Sreeprasanth Pulinthanathu

doi:10.1039/c9cy02610j

Cited by 14 publications

(15 citation statements)

References 147 publications

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“…Petrochemical Cracking [112,[114][115][116][117][118][119][120][121][122][123][124][125][126][127][128][129][130] Isomerization [101,112,[122][123][124][130][131][132][133][134] Small molecule formation [68,113,[135][136][137][138] Oxidation Ammoxidation [139] CO oxidation [140,141] Controlled Combustion [142] Epoxidation [69,143,144] Other industrially relevant processes Adsorption [83,145] N 2 O abatement [146][147][148][149][150][151]…”

Section: High Throughput Gas Chromatography Application Referencesmentioning

confidence: 99%

High Throughput Methods in the Synthesis, Characterization, and Optimization of Porous Materials

et al. 2020

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Notwithstanding these impediments, in many fields of materials science, solutions are being designed to mitigate hindrances to the efficient sampling of chemical space and improving the robustness of computational screening models through a combination of high throughput synthesis (HTS), characterization, and machine learning. In this review, we highlight key developments in high throughput approaches pertinent to porous materials. Specifically, we focus on developments in the field of zeolitic materials, metal-organic frameworks (MOFs), and touch upon covalent organic frameworks (COFs). Although superficially these classes of materials have little in common, there are structural links such as topology which allow for the consideration of how high throughput methods contrast with one another. By contrasting developments in different fields, we identify some underutilized approaches which could be leveraged in the future. We target structurally ordered materials because the exploration of chemical and topological space is more straightforward to enumerate, though similar approaches could be applied to disordered materials. The scale of the problem faced in materials science of targeted structure and function [1] is by no means unique; in drug discovery, HTS and chemoinformatic approaches have been used for more than 40 years in an attempt to accelerate the discovery of druggable molecules. [2,3] Unlike the drug discovery process, where Lipinski's "rule of 5" [4] provides a reliable top level sift for viable targets, identifying the most promising material for a target application requires very particular properties that may be intertwined in complex and contradictory ways. For example, thermoelectrics require high electrical conductivity and low thermal conductivity and yet these properties are typically correlated unless they can be separated. [5] Given the large scope of potential applications, the advent of the Materials Genome Initiative (MGI) [6,7] in the United States has undoubtedly helped to promote ways to solve the aforementioned obstacles and numerous others. Similarly there are major initiatives within the EU (e.g., NOMAD [8] and BIGmax [9]) and Switzerland (MARVEL [10]). In the MGI, nanoporous materials, including zeolites and MOFs, have been specifically targeted [11] and in this review, we seek to highlight particular challenges in the field of porous materials and how researchers have sought to overcome these challenges. We focus primarily on the methods used in HTS and rapid throughput/screening computational approaches. Aspects of high throughput computation applied to porous materials have been reviewed before, [12-14] as has high throughput experimentation (HTE) [15,16] but here we focus on their combination within an integrated workflow. Porous materials are widely employed in a large range of applications, in particular, for storage, separation, and catalysis of fine chemicals. Synthesis, characterization, and pre-and post-synthetic computer simulations are mostly carried out in a piecemeal a...

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Section: High Throughput Gas Chromatography Application Referencesmentioning

confidence: 99%

High Throughput Methods in the Synthesis, Characterization, and Optimization of Porous Materials

et al. 2020

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“…Moreover, as ALD catalysts designed at atomic level with excellent uniformity, the corresponding reaction mechanisms can also be deduced partly at atomic level by advanced characterization techniques couples with theoretical calculations [77–85] . In addition, ALD displayed key roles in designing zeolite‐supported catalysts with enhanced catalytic performance, [86] such as the deposition of metals on zeolite, confining metals in zeolite, modifying acid sites of zeolite by aluminum, and construction metal films on zeolite, [69,87–91] as illustrated in Figure 2. However, to the best of our knowledge, review regarding applications of ALD to fabricate zeolite‐based catalysts at atomic‐level is seldom reported.…”

Section: Introductionmentioning

confidence: 99%

“…explored the ALD method to introduce Pt (0.5 wt.%) metal sites into ZSM‐5 zeolite performed as bifunctional catalyst. The electron microscopy clearly revealed that homogeneously dispersed small Pt clusters (1–2 nm) presented on the ZSM‐5 zeolite, and the designed Pt‐ALD‐ZSM‐5 sample exhibited an excellent catalytic activity for n ‐decane hydroisomerization with high selectivity of 2‐methylnonane [90] . For comparison, parent ZSM‐5 was loaded with Pt using incipient wetness impregnation (IWI) of Pt(NH 3 ) 4 Cl 2 .…”

Section: Introducing Metals On Zeolites By Aldmentioning

confidence: 99%

“…Intensive efforts focused on exploring the deposition of none‐noble metals on zeolites by ALD method have been reported, such as Zn, Fe, Co, Ga and Al [90,101–108] . The particle sizes, dispersion, active phases and catalytic performances of the mentioned metals are usually optimized by ALD.…”

Section: Introducing Metals On Zeolites By Aldmentioning

confidence: 99%

“…The coverage of external surface allowed the propagation of guest molecules along the longitudinal extension of the MFI‐type zeolite, which may provide the possibility for the fluxes of reactant and product molecules within single zeolite crystals during catalytic reactions. Recently, the deposition of Fe/Co to decorate Pt cluster in zeolite and Al/Ga for introducing acid sites in zeolites performing bifunctional catalysis were explored, and the details were presented in sections 2.2 and 3 [104,111] …”

Section: Introducing Metals On Zeolites By Aldmentioning

confidence: 99%

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Atomic‐Scale Designing of Zeolite Based Catalysts by Atomic Layer Deposition

Yin

Gao

et al. 2021

ChemPhysChem

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Zeolite‐supported catalysts have been widely used in the field of heterogeneous catalysis. Atomic‐scale governing the metal or acid sites on zeolites still encounters great challenge in controllable synthesis and developing of novel catalysts. Atomic layer deposition (ALD), owing to its unique character of self‐limiting surface reactions, becomes one of the most promising and controllable strategies to tailor the metallic deposition sites in atomic scale precisely. In this review, we present a comprehensive summary and viewpoint of recent research in designing and engineering the structural of zeolite‐based catalysts via ALD method. A prior focus is laid on the deposition of metals on the zeolites with emphasis on the isolated states of metals, followed by introducing the selected metals into channels of zeolites associates with identifying the location of metals in and/or out of the channels. Subsequently, detailed analysis of tailoring the acid sites of different zeolites is provided. Assisted synthesis of zeolite and the regioselective deposition of metal on special sites to modify the structures of zeolites are also critically discussed. We further summarize the challenges of ALD with respect to engineering the active sites in heterogeneous zeolite‐based catalysts and provide the perspectives on the development in this field.

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Propane Aromatization Tuned by Tailoring Cr Modified Ga/ZSM‐5 Catalysts

Tan

et al. 2021

ChemCatChem

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Accelerating propane dehydrogenation in propane aromatization is vital because it is the first and rate control step. In this study, we introduced Cr to Ga/ZSM‐5 by tuning its impregnation sequence and amount, which was expected to accelerate the dehydrogenation step and improve aromatization performance. The impregnation sequence of Cr on catalyst not only affected the interaction between Ga and ZSM‐5, but also tuned the amount of dehydrogenation active species Cr3+. Due to the plenty of Cr3+ species and strong interaction between Ga species and ZSM‐5, 2Cr/GaZ5 catalyst accelerated the dehydrogenation step and improved the aromatization process. More light hydrocarbons were preferred to be produced and were further converted into BTX on 2Cr/GaZ5 catalyst. Excessive Cr on catalyst caused the formation of Cr2O3 particles with worse dispersion. The aggregated Cr2O3 decreased the strong acidity of catalyst, which could not further promote propane conversion and decreased the aromatization ability of catalyst.

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Creation of gallium acid and platinum metal sites in bifunctional zeolite hydroisomerization and hydrocracking catalysts by atomic layer deposition

Abstract: Active sites in bifunctional zeolite catalysts were engineered using atomic layer deposition (ALD). Gallium acid and platinum metal sites were introduced to zeolites via ALD and investigated for a hydroconversion reaction.

Cited by 14 publications

References 147 publications

High Throughput Methods in the Synthesis, Characterization, and Optimization of Porous Materials

High Throughput Methods in the Synthesis, Characterization, and Optimization of Porous Materials

Atomic‐Scale Designing of Zeolite Based Catalysts by Atomic Layer Deposition

Propane Aromatization Tuned by Tailoring Cr Modified Ga/ZSM‐5 Catalysts

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