Study on the modification of unsupported hydrodesulfurization catalysts by the ZSM-5 zeolite nanoclusters

Dong, Chengwu; Yin, Changlong; Wu, Tongtong; Wu, Zhuyan; Liu, Dong; Liu, Chenguang

doi:10.1016/j.apcata.2019.117113

Cited by 10 publications

(3 citation statements)

References 53 publications

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“…Research on the catalytic performance of zeolites in the hydrodesulfurization reaction was started in the 1990s . In recent years, zeolites have received more attention in the hydrodesulfurization reaction. − However, only a few articles have been related to the use of graphene or grapheme oxide as support in the hydrodesulfurization reaction, and only one article has focused on the desulfurization reaction with a zeolite/graphene composite. Ali et al and Saleh et al.…”

Section: Challenges and Perspectivesmentioning

confidence: 99%

Future Perspectives on Zeolite/Graphene Oxide Composite Synthesis and Applications

Subramanian,

Perumal,

Mangesh

et al. 2023

Energy Fuels

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Graphene research continues to advance into many territories, and in this study, an exhaustive analysis of the fabrication and performance of zeolite/graphene composites is attempted for the first time. Apart from zeolite/graphene applications, the potential of graphene composites with other materials has been presented. Future perspectives and challenges have been presented extensively to enable researchers to explore the synergy of graphene composites for various unexplored applications. Carbon atoms are arranged in a two-dimensional plate-like pattern to produce the hexagonal network-shaped material known as graphene, which has a material thickness of one atom. Zeolites are frequently employed widely as heterogeneous catalysts in a variety of chemical industries due to their enormous surface area and constant pore size. Recently, scientists have worked to better understand how graphene and zeolite work together as a composite catalyst. The removal of dyes, the adsorption of heavy metal ions, electrochemical capacitors and sensors, oil purification, microbial fuel cells, and reverse osmosis membranes were among the potential uses for zeolite/graphene oxide composites that were investigated in earlier studies. The aforementioned applications show how versatile zeolite/graphene oxide composites are. In addition to summarizing earlier studies on the techniques for synthesizing graphene with common zeolites, this study has also taken historical data to demonstrate improvements in the use of zeolite/graphene composites in diverse industrial applications. There is, nevertheless, a lot of potential for the study of zeolite/graphene composites because the bulk of applications use zeolites and graphene oxide as distinct components. Again, this study has explored the composite potential of graphene with other materials in energy storage, fuel cracking and adsorption applications. This study provides a comprehensive review of the synergistic benefits of graphene composites and its future opportunities and challenges.

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Section: Challenges and Perspectivesmentioning

confidence: 99%

Future Perspectives on Zeolite/Graphene Oxide Composite Synthesis and Applications

Subramanian,

Perumal,

Mangesh

et al. 2023

Energy Fuels

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“…A number of studies have been denoted on optimizing the HDS process and the others to investigate the catalytic activity, selectivity and the stability of different heterogeneous catalysts for the HDS reaction. The increased temperature of the HDS reaction of dibenzothiophene with the presence of unsupported CoMo catalyst tends to enhance the catalytic activity for the formation of a hollow Co unsupported NiMo catalysts with ZSM-5 zeolite tended to higher speci c surface area with good dispersion and active Lewis acid and consequently a faster dibenzothiophene reaction and better isomerization rate [9]. The catalytic activity of the CoMo and NiMo catalysts also improved the HDS reaction when supported on zeolite Y/graphene for the increased surface area and good distribution of the active Mo, Co and Ni phases [10].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Catalytic Activity of CoMo and CoMoW Catalysts supported on γ-Al 2 O 3 for Efficient Naphtha Hydrodesulfurization

Albdiry

Mahdi

2023

Preprint

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Bimetallic Co5Mo15 of 5 wt.% Cobalt as a promoter and 15 wt.% Molybdenum as an active metal and trimetallic Co5Mo15-xWx (x = 1, 3, 5 wt.%) heterogeneous catalysts supported on gamma alumina (γ-Al2O3) were synthesized by an incipient wetness co-impregnation process. The structural and the physicochemical characteristics of the prepared bi- and tri-metallic catalysts were evaluated by the XRD, SEM, BET and BJH, respectively. The role of third W active metal on the catalytic activity was determined through a hydrodesulfurization (HDS) reaction of naphtha at four different reaction temperatures (250, 275, 300, 325ºC) and four liquid hourly space velocities, LHSV (3, 4, 5, 6 hr-1) under constant 1.5 MPa H2 pressure. The trimetallic CoMoW5 catalyst exhibited the maximal HDS efficiency at 325ºC and 3 hr-1 liquid flow of 88% sulfur removed compared to the CoMo catalyst. This was ascribed for the role of the highly dispersed active W metal and presence of the sulfided CoMoWS and CoWS sites on the alumina surface that leads to increase the surface area and the porous structure, and enhancing the metal/sulfur bond.

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“…DDS is a preferential HDS route because of the less hydrogen consumption, while the prior HDS pathway over NiMo/γ-Al 2 O 3 catalyst is HYD. [21,22] For 4,6-DMDBT, three different pathways can be found from the literature: DDS, HYD and ISO. [23] Among these three pathways, ISO pathway is more conducive to ultra-deep desulfurization and more expected because the methyl groups can be shifted away from the 4 and 6 positions by isomerization and thus reduce steric hindrance of 4,6-DMDBT.…”

Section: Introductionmentioning

confidence: 99%

Hydrodesulfurization over NiMo Catalysts Supported on Yolk‐shell Silica Materials with Controllable Cavity Size

Kong

Zhang

et al. 2022

ChemistrySelect

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Novel yolk-shell (YS) mesoporous silica materials with different cavity sizes were successfully synthesized. Aluminium was bridged into the yolk-shell framework of silica by a post synthesis method to improve the acidity of YS, namely Al-YS. The corresponding NiMo/Al-YS catalysts were also fabricated and used in the hydrodesulfurization (HDS) reaction of dibenzothiophene (DBT) and 4,6-dimethyldibenzothiophene (4,6-DMDBT). The NiMo/Al-YS catalyst with the cavity size of 154 nm (NiMo/Al-YS-154) exhibits the superior conversions of DBT (99.2 %) and 4,6-DMDBT (96.1 %) at 340 °C, 4.0 MPa, 10 h À 1 , highest k HDS (13.4 × 10 À 4 mol gÀ 1 h À 1 for DBT and 8.9 mol g À 1 h À 1 for 4,6-DMDBT) and highest TOF for DBT (3.7 h À 1 ) and 4,6-DMDBT (2.3 h À 1 ) among the investigated catalysts. The appropriate cavity size of NiMo/Al-YS-154 catalyst plays the key role in obtaining its superior HDS catalytic performance. Furthermore, the possible reaction networks of DBT and 4, 6-DMDBT HDS over NiMo/Al-YS-x catalysts were also presented.

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Study on the modification of unsupported hydrodesulfurization catalysts by the ZSM-5 zeolite nanoclusters

Cited by 10 publications

References 53 publications

Future Perspectives on Zeolite/Graphene Oxide Composite Synthesis and Applications

Future Perspectives on Zeolite/Graphene Oxide Composite Synthesis and Applications

Synthesis and Catalytic Activity of CoMo and CoMoW Catalysts supported on γ-Al 2 O 3 for Efficient Naphtha Hydrodesulfurization

Hydrodesulfurization over NiMo Catalysts Supported on Yolk‐shell Silica Materials with Controllable Cavity Size

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