Design of Ordered Mesoporous Sulfonic Acid Functionalized ZrO 2 /organosilica Bifunctional Catalysts for Direct Catalytic Conversion of Glucose to Ethyl Levulinate

ChemCatChem ◽  
2018 ◽  
Vol 10 (21) ◽  
pp. 4953-4965 ◽  
Author(s):  
Daiyu Song ◽  
Qingqing Zhang ◽  
Yingnan Sun ◽  
Panpan Zhang ◽  
Yi‐Hang Guo ◽  
...  
Keyword(s):  
Sulfonic Acid ◽  
Catalytic Conversion ◽  
Bifunctional Catalysts ◽  
Ethyl Levulinate ◽  
Ordered Mesoporous

Production of ethyl levulinate fuel bioadditive from 5-hydroxymethylfurfural over sulfonic acid functionalized biochar catalysts

Fuel ◽  
2021 ◽  
Vol 303 ◽  
pp. 121227
Author(s):  
Andreia F. Peixoto ◽  
Ruben Ramos ◽  
Manuela M. Moreira ◽  
O. Salomé G.P. Soares ◽  
Lucilia S. Ribeiro ◽  
...  
Keyword(s):  
Sulfonic Acid ◽  
Ethyl Levulinate

Engineering Modified Mesoporous Silica Catalysts through Porosity and Surface Acidity Control for Selective Production of DME

2021 ◽  
Vol 894 ◽  
pp. 45-49
Author(s):  
Rosanna Viscardi ◽  
Vincenzo Barbarossa ◽  
Raimondo Maggi ◽  
Francesco Pancrazzi
Keyword(s):  
Mesoporous Silica ◽  
Dimethyl Ether ◽  
Sulfonic Acid ◽  
Pore Diameter ◽  
Solid Acid ◽  
Surface Acidity ◽  
High Surface ◽  
High Surface Area ◽  
Bifunctional Catalysts ◽  
Scanning Electronic Microscopy

DME has been received the attention as a renewable energy due to its thermal efficiencies equivalent to diesel fuel, lower NOx emission, near-zero smoke and non-toxic. DME can be obtained by methanol dehydration over solid acid catalysts or directly from syngas over bifunctional catalysts. The catalytic dehydration of methanol to DME has been widely studied in the literature over pure or modified γ -aluminas (γ-Al2O3) and zeolites. Mesoporous silica has obtained much consideration due to its well-defined structural order, high surface area, and tunable pore diameter. In this work, sulfonic acid and aluminium modified mesoporous silica were synthesized and tested as catalysts for production of dimethyl ether from methanol. The modified silicas were studied utilizing XRD, N2 physisorption, pyridine adsorption, and scanning electronic microscopy. The effects of reaction temperature and water deactivation on the methanol selectivity and conversion to dimethyl ether were investigated. Sulfonic acid modified mesoporous silica showed higher selectivity and stability of DME than that of aluminosilicate. The grafting of mesoporous silica with sulfonic groups displayed much more enhanced hydrothermal stability than Al-MCM-41 and γ-Al2O3.

scholarly journals Nitrogen-Doped Ordered Mesoporous Carbons Supported Co3O4 Composite as a Bifunctional Oxygen Electrode Catalyst

Surfaces ◽  
2019 ◽  
Vol 2 (2) ◽  
pp. 229-240 ◽  
Author(s):  
Jing Wang ◽  
Shuwei Zhang ◽  
Haihong Zhong ◽  
Nicolas Alonso-Vante ◽  
Dianqing Li ◽  
...  
Keyword(s):  
Precious Metal ◽  
Solvothermal Method ◽  
Oxygen Electrode ◽  
Rechargeable Batteries ◽  
Alkaline Media ◽  
Bifunctional Catalysts ◽  
Mesoporous Carbons ◽  
Ordered Mesoporous Carbons ◽  
Ordered Mesoporous ◽  
Regenerative Cells

It is increasingly useful to develop bifunctional catalysts for oxygen reduction and oxygen evolution reaction (ORR and OER) for fuel cells, metal-air rechargeable batteries, and unitized regenerative cells. Here, based on the excellent conductivity and stability of ordered mesoporous carbons, and the best ORR and OER activity of Co3O4, the composite Co3O4/N-HNMK-3 was designed and manufactured by means of a solvothermal method, using ordered N-doped mesoporous carbon (N-HNMK-3) as substrate, and then the bifunctional electrocatalytic performance corresponding to ORR, OER in alkaline media was carefully investigated. The results showed that Co3O4/N-HNMK-3 composite, a non-precious metal centered electrocatalyst, displayed excellent ORR performance (activity, selectivity, and stability) close to that of commercial 20 wt.% Pt/C and a promising OER activity near 20 wt.% RuO2/C. The outstanding bifunctional activities of Co3O4/N-HNMK-3 was assessed with the lowest △E value of 0.86 V (EOER,10 mA cm−2-EORR,−3 mA cm−2) with respect to the two commercial precious metal-based electrocatalysts.

scholarly journals Designing and Fabricating Ordered Mesoporous Metal Oxides for CO2 Catalytic Conversion: A Review and Prospect

Materials ◽  
2019 ◽  
Vol 12 (2) ◽  
pp. 276 ◽  
Author(s):  
Yan Cui ◽  
Xinbo Lian ◽  
Leilei Xu ◽  
Mindong Chen ◽  
Bo Yang ◽  
...  
Keyword(s):  
Metal Oxides ◽  
Active Sites ◽  
Porous Metal ◽  
Catalytic Conversion ◽  
Thermal Stabilities ◽  
Heterogeneous Catalytic ◽  
Mesoporous Metal Oxides ◽  
Internal Surfaces ◽  
Ordered Mesoporous ◽  
Mesoporous Metal

In the past two decades, great progress has been made in the aspects of fabrication and application of ordered mesoporous metal oxides. Ordered mesoporous metal oxides have attracted more and more attention due to their large surface areas and pore volumes, unblocked pore structure, and good thermal stabilities. Compared with non-porous metal oxides, the most prominent feature is their ability to interact with molecules not only on their outer surface but also on the large internal surfaces of the material, providing more accessible active sites for the reactants. This review carefully describes the characteristics, classification and synthesis of ordered mesoporous metal oxides in detail. Besides, it also summarizes the catalytic application of ordered mesoporous metal oxides in the field of carbon dioxide conversion and resource utilization, which provides prospective viewpoints to reduce the emission of greenhouse gas and the inhibition of global warming. Although the scope of current review is mainly limited to the ordered mesoporous metal oxides and their application in the field of CO2 catalytic conversion via heterogeneous catalysis processes, we believe that it will provide new insights and viewpoints to the further development of heterogeneous catalytic materials.

Design of periodic mesoporous sulfonic acid and titanium bi-functionalized alkyl-bridged organosilica hybrid catalysts for efficient synthesis of ethyl levulinate

2019 ◽  
Vol 279 ◽  
pp. 352-363 ◽  
Author(s):  
Daiyu Song ◽  
Panpan Zhang ◽  
Yingnan Sun ◽  
Qingqing Zhang ◽  
Yihang Guo
Keyword(s):  
Sulfonic Acid ◽  
Efficient Synthesis ◽  
Ethyl Levulinate ◽  
Hybrid Catalysts

Design of graphene oxide by a one‐pot synthetic route for catalytic conversion of furfural alcohol to ethyl levulinate

2019 ◽  
Vol 94 (10) ◽  
pp. 3093-3101 ◽  
Author(s):  
Jiaming Wu ◽  
Yuewen Shao ◽  
Guojian Jing ◽  
Zhanming Zhang ◽  
Zhengmao Ye ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Catalytic Conversion ◽  
Synthetic Route ◽  
One Pot ◽  
Ethyl Levulinate
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