Enhanced Selective Production of Arenes and Regenerating Rate in Aryl Ether Hydrogenolysis over Mesoporous Nickel in Plug-Flow Reactors

Ordered mesoporous nickel (mesoNi) was successfully synthesized with a hard templating method by using KIT-6 ordered mesoporous silica as a template. With small-angle X-ray diffraction (SAXRD), transmission electron microscopy (TEM) and N2 sorption technique, the mesoporous structures of synthesized catalysts were characterized with desired high surface area (84.2 m2·g−1) and narrow pore size distribution. MesoNi exhibited outstanding catalytic cleavage activity for lignin model compounds (benzyl phenyl ether, BPE) with high selectivity of arenes in the flow reactor system. MesoNi also showed higher regeneration rates than non-porous ones, which were confirmed from deactivation and regeneration mechanism studies in the flow reaction system with varied high temperature and pressure. The adsorbed poisoning species on the mesoporous Ni surface were analyzed and phenol could be the main poisoning species. The excellent catalytic cleavage performance of mesoNi originates from their unique mesoporous structure, which offers high surface area and Ni active sites. The outstanding catalytic performance shows that this process provides a promising candidate for improved lignin valorization with general applicability.

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Spidery catalyst for the synthesis of quinazoline-2,4(1H,3H)-diones

Catalysis Science & Technology ◽

10.1039/c5cy01543j ◽

2016 ◽

Vol 6 (5) ◽

pp. 1435-1441 ◽

Cited By ~ 33

Author(s):

Seyed Mohsen Sadeghzadeh

Keyword(s):

Surface Area ◽

Active Sites ◽

High Surface ◽

High Surface Area

In this study, a novel fibrous nanosilica (KCC-1) based nanocatalyst (Au, Pd, and Cu) with a high surface area and easy accessibility of active sites was successfully developed by a facile approach.

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Catalytic Cracking of n-Hexadecane Using Carbon Nanostructures/Nano-Zeolite-Y Composite Catalyst

Catalysts ◽

10.3390/catal10121385 ◽

2020 ◽

Vol 10 (12) ◽

pp. 1385

Author(s):

Botagoz Zhuman ◽

Shaheen Fatima Anis ◽

Saepurahman ◽

Gnanapragasam Singravel ◽

Raed Hashaikeh

Keyword(s):

Surface Area ◽

Catalytic Cracking ◽

Carbon Nanostructures ◽

Active Sites ◽

Zeolite Y ◽

High Surface ◽

High Surface Area ◽

Composite Catalyst ◽

Homogeneous Distribution ◽

Binding Material

Zeolite-based catalysts are usually utilized in the form of a composite with binders, such as alumina, silica, clay, and others. However, these binders are usually known to block the accessibility of the active sites in zeolites, leading to a decreased effective surface area and agglomeration of zeolite particles. The aim of this work is to utilize carbon nanostructures (CNS) as a binding material for nano-zeolite-Y particles. The unique properties of CNS, such as its high surface area, thermal stability, and flexibility of its fibrous structure, makes it a promising material to hold and bind the nano-zeolite particles, yet with a contemporaneous accessibility of the reactants to the porous zeolite structure. In the current study, a nano-zeolite-Y/CNS composite catalyst was fabricated through a ball milling approach. The catalyst possesses a high surface area of 834 m2/g, which is significantly higher than the conventional commercial cracking catalysts. Using CNS as a binding material provided homogeneous distribution of the zeolite nanoparticles with high accessibility to the active sites and good mechanical stability. In addition, CNS was found to be an effective binding material for nano-zeolite particles, solving their major drawback of agglomeration. The nano-zeolite-Y/CNS composite showed 80% conversion for hexadecane catalytic cracking into valuable olefins and hydrogen gas, which was 14% higher compared to that of pure nano-zeolite-Y particles.

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Ultrasonic-assisted preparation of highly active Co3O4/MCM-41 adsorbent and its desulfurization performance for low H2S concentration gas

RSC Advances ◽

10.1039/d0ra05606e ◽

2020 ◽

Vol 10 (50) ◽

pp. 30214-30222

Author(s):

Bolong Jiang ◽

Jiaojing Zhang ◽

Yanguang Chen ◽

Hua Song ◽

Tianzhen Hao ◽

...

Keyword(s):

Surface Area ◽

Active Sites ◽

High Surface ◽

High Surface Area ◽

Highly Active ◽

Ultrasonic Assisted ◽

Sulfur Capacity ◽

Mcm 41

Co3O4/MCM-41 adsorbent with high surface area and more active sites was successfully prepared by ultrasonic assisted impregnation (UAI) technology and it has been found that the sulfur capacity was improved by 33.2% because of ultrasonication.

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Defect Chemistry of Oxide Nanomaterials with High Surface Area: Ordered Mesoporous Thin Films of the Oxygen Storage Catalyst CeO2–ZrO2

ACS Nano ◽

10.1021/nn400255w ◽

2013 ◽

Vol 7 (4) ◽

pp. 2999-3013 ◽

Cited By ~ 58

Author(s):

Pascal Hartmann ◽

Torsten Brezesinski ◽

Joachim Sann ◽

Andriy Lotnyk ◽

Jens-Peter Eufinger ◽

...

Keyword(s):

Thin Films ◽

Surface Area ◽

High Surface ◽

High Surface Area ◽

Defect Chemistry ◽

Oxygen Storage ◽

Ordered Mesoporous ◽

Mesoporous Thin Films ◽

Storage Catalyst

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Amino-functionalized bimodal ordered mesoporous carbon with high surface area for efficient adsorption of lead (II) ions

10.5004/dwt.2017.0334 ◽

2017 ◽

Vol 60 ◽

pp. 200-211

Author(s):

Kunquan Li ◽

Zeqing Wan ◽

Jun Li ◽

Mingzhou Lu ◽

Xiaohua Wang

Keyword(s):

Surface Area ◽

Mesoporous Carbon ◽

High Surface ◽

High Surface Area ◽

Ordered Mesoporous Carbon ◽

Ordered Mesoporous

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Bifunctional Materials for CO₂ Adsorption: Short Review

Journal of Chemical Engineering and Industrial Biotechnology ◽

10.15282/jceib.v7i2.7021 ◽

2021 ◽

Vol 7 (2) ◽

pp. 15-19

Author(s):

S. M. Yusof ◽

L. P. Teh

Keyword(s):

Surface Area ◽

Active Sites ◽

Co2 Adsorption ◽

High Surface ◽

Co Adsorption ◽

High Surface Area ◽

Short Review ◽

High Dispersion ◽

High Porosity ◽

Adsorption Performance

In recent years, there has been growing interest in adsorbents with high surface area, high porosity, high stability and high selectivity for CO2 adsorption. By the incorporation of the additive on the supports such as zeolite, silica, and carbon, the physicochemical properties of the adsorbent and CO2 adsorption performance can be enhanced. In this review, we focus on the overview of bifunctional materials (BFMs) for CO2 adsorption. The findings of this study suggests that the high surface area and high porosity of the support provide a good medium for high dispersion and accessibility of additives (amine or metal oxide), enhancing the CO2 adsorption efficiency. The excessive additive however may lead to a decrease of CO2 adsorption performance due to pore blockage and the decrease of active sites for CO2 interactions. The synergistic relationship of the supporting material and additive is significant towards the enhancement of CO2 adsorption.

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