Solvent-free crystallization of ZSM-5 zeolite on SiC foam as a monolith catalyst for biofuel upgrading

Zhu, Qi; Wang, Qianqian; Yang, Zhiyuan; Wang, Liang; Meng, Xiangju; Xiao, Feng‐Shou

doi:10.1016/s1872-2067(20)63550-1

Cited by 16 publications

(9 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Wang and collaborators came across similar conclusions with their Pd@ZSM-5/SiC composite employed in the hydrodeoxygenation of methyl oleate, a model molecule for biofuel. 438 Using an unconventional solvent-free crystallization process, this team obtained a pure SiC surface coating based on a highly crystalline zeolite sheath to be used as the catalyst in the process. Compared to the Pd@ZSM-5 powder, their Pd@ZSM-5/ SiC monolith showed a markedly improved process efficiency linked again to the fast mass and heat transfer allowed by the honeycomb SiC structure.…”

Section: Catalytic Applicationsmentioning

confidence: 99%

“…They also showed a higher durability of their foam composite along with a higher stability at the high-temperature conditions required for the catalyst regeneration. 438 3.2.4.3. Catalytic Oxidative Desulfurization (ODS).…”

Section: Catalytic Applicationsmentioning

confidence: 99%

“…Indeed, catalyst fouling due to the generation of coke deposits was significantly higher when the reaction was operated in the packed-bed configuration with ZSM-5 pellets than in the case of their structured ZSM-5/SiC foam catalyst. Wang and collaborators came across similar conclusions with their Pd@ZSM-5/SiC composite employed in the hydrodeoxygenation of methyl oleate, a model molecule for biofuel . Using an unconventional solvent-free crystallization process, this team obtained a pure SiC surface coating based on a highly crystalline zeolite sheath to be used as the catalyst in the process.…”

Section: Catalytic Applicationsmentioning

confidence: 99%

See 2 more Smart Citations

Porous Silicon Carbide (SiC): A Chance for Improving Catalysts or Just Another Active-Phase Carrier?

et al. 2021

View full text Add to dashboard Cite

There is an obvious gap between efforts dedicated to the control of chemicophysical and morphological properties of catalyst active phases and the attention paid to the search of new materials to be employed as functional carriers in the upgrading of heterogeneous catalysts. Economic constraints and common habits in preparing heterogeneous catalysts have narrowed the selection of active-phase carriers to a handful of materials: oxide-based ceramics (e.g. Al2O3, SiO2, TiO2, and aluminosilicates–zeolites) and carbon. However, these carriers occasionally face chemicophysical constraints that limit their application in catalysis. For instance, oxides are easily corroded by acids or bases, and carbon is not resistant to oxidation. Therefore, these carriers cannot be recycled. Moreover, the poor thermal conductivity of metal oxide carriers often translates into permanent alterations of the catalyst active sites (i.e. metal active-phase sintering) that compromise the catalyst performance and its lifetime on run. Therefore, the development of new carriers for the design and synthesis of advanced functional catalytic materials and processes is an urgent priority for the heterogeneous catalysis of the future. Silicon carbide (SiC) is a non-oxide semiconductor with unique chemicophysical properties that make it highly attractive in several branches of catalysis. Accordingly, the past decade has witnessed a large increase of reports dedicated to the design of SiC-based catalysts, also in light of a steadily growing portfolio of porous SiC materials covering a wide range of well-controlled pore structure and surface properties. This review article provides a comprehensive overview on the synthesis and use of macro/mesoporous SiC materials in catalysis, stressing their unique features for the design of efficient, cost-effective, and easy to scale-up heterogeneous catalysts, outlining their success where other and more classical oxide-based supports failed. All applications of SiC in catalysis will be reviewed from the perspective of a given chemical reaction, highlighting all improvements rising from the use of SiC in terms of activity, selectivity, and process sustainability. We feel that the experienced viewpoint of SiC-based catalyst producers and end users (these authors) and their critical presentation of a comprehensive overview on the applications of SiC in catalysis will help the readership to create its own opinion on the central role of SiC for the future of heterogeneous catalysis.

show abstract

Section: Catalytic Applicationsmentioning

confidence: 99%

Section: Catalytic Applicationsmentioning

confidence: 99%

Section: Catalytic Applicationsmentioning

confidence: 99%

See 1 more Smart Citation

Porous Silicon Carbide (SiC): A Chance for Improving Catalysts or Just Another Active-Phase Carrier?

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Zeolites are a group of crystalline aluminosilicate materials with microporous structures and are widely investigated as supports of the Ni-based catalysts of the CRM reaction because of their advantages of abundant microporous channels, good thermal stabilities, large specific surface areas, and big pore volumes (Martínez Galeano et al, 2019;Kumar et al, 2020;Zhu et al, 2020). The Si/Al ratio of zeolite reflects the number of charge compensating ions and can modify the surface acidity (Li W. et al, 2019).…”

Section: Zeolite Supportsmentioning

confidence: 99%

Recent Progresses in the Design and Fabrication of Highly Efficient Ni-Based Catalysts With Advanced Catalytic Activity and Enhanced Anti-coke Performance Toward CO2 Reforming of Methane

Chen

et al. 2020

Front. Chem.

View full text Add to dashboard Cite

CO 2 reforming of methane (CRM) can effectively convert two greenhouse gases (CO 2 and CH 4) into syngas (CO + H 2). This process can achieve the efficient resource utilization of CO 2 and CH 4 and reduce greenhouse gases. Therefore, CRM has been considered as a significantly promising route to solve environmental problems caused by greenhouse effect. Ni-based catalysts have been widely investigated in CRM reactions due to their various advantages, such as high catalytic activity, low price, and abundant reserves. However, Ni-based catalysts usually suffer from rapid deactivation because of thermal sintering of metallic Ni active sites and surface coke deposition, which restricted the industrialization of Ni-based catalysts toward the CRM process. In order to address these challenges, scientists all around the world have devoted great efforts to investigating various influencing factors, such as the option of appropriate supports and promoters and the construction of strong metal-support interaction. Therefore, we carefully summarized recent development in the design and preparation of Ni-based catalysts with advanced catalytic activity and enhanced anti-coke performance toward CRM reactions in this review. Specifically, recent progresses of Ni-based catalysts with different supports, additives, preparation methods, and so on, have been summarized in detail. Furthermore, recent development of reaction mechanism studies over Ni-based catalysts was also covered by this review. Finally, it is prospected that the Ni-based catalyst supported by an ordered mesoporous framework and the combined reforming of methane will become the future development trend.

show abstract

“…Because of its tunable acidic properties, high thermal stability, and high selectivity to light aromatics (BTX), the HZSM‐5 zeolite is frequently used for MTA, and exhibits excellent catalytic performance. [ 5–11 ] Moreover, the construction of nano‐sized HZSM‐5 [ 12–16 ] and modified HZSM‐5 [ 5,6,10,11,17–20 ] could further improve the catalyst lifetime and BTX selectivity, respectively. The considerable external surface acid sites of nano‐sized HZSM‐5 would induce the secondary reactions of BTX hydrocarbons [ 21–24 ] and coke formation [ 25–31 ] in the MTH process, which not only decreases the BTX selectivity, but also aggravates the deactivation of catalyst.…”

Section: Introductionmentioning

confidence: 99%

Highly shape‐selective Zn‐P/HZSM‐5 zeolite catalyst for methanol conversion to light aromatics

Jia

Wang

Zhang

et al. 2020

Applied Organom Chemis

View full text Add to dashboard Cite

A highly shape-selective and relatively long-lifetime HZSM-5-based catalyst (Zn-2P/HZSM-5) was prepared by chemical modification with both ZnSiF 6 Á6H 2 O and H 3 PO 4 solution. The phosphoric acid modification could effectively modulate the Brønsted acid strength of the HZSM-5 catalyst, which promotes the oligomerization, alkylation, cyclization, and hydrogen transfer reactions. The introduction of Zn-Lewis acid sites significantly improved the dehydroaromatization of higher olefins. All of these were very beneficial for the generation of BTX (i.e. benzene, toluene, and xylene) hydrocarbons in aromatization of methanol. The coke amount and the average rate of coke formation decreased over the Zn-2P/HZSM-5 catalysts, which may largely be ascribed to its lower strong acid sites and lower outer surface acidity. The catalytic performance of methanol aromatization showed that the Zn-2P/HZSM-5 catalyst exhibited the highest BTX selectivity of about 46.76% and the longest catalytic lifetime of about 498 h at T = 400 C, P = 0.1 MPa, and weight hourly space velocity = 0.7 h −1 .

show abstract

Solvent-free crystallization of ZSM-5 zeolite on SiC foam as a monolith catalyst for biofuel upgrading

Cited by 16 publications

References 43 publications

Porous Silicon Carbide (SiC): A Chance for Improving Catalysts or Just Another Active-Phase Carrier?

Porous Silicon Carbide (SiC): A Chance for Improving Catalysts or Just Another Active-Phase Carrier?

Recent Progresses in the Design and Fabrication of Highly Efficient Ni-Based Catalysts With Advanced Catalytic Activity and Enhanced Anti-coke Performance Toward CO2 Reforming of Methane

Highly shape‐selective Zn‐P/HZSM‐5 zeolite catalyst for methanol conversion to light aromatics

Contact Info

Product

Resources

About