Synthesis of Ni/mesoporous ZSM-5 for direct catalytic conversion of cellulose to hexitols: modulating the pore structure and acidic sites via a nanocrystalline cellulose template

2016 ◽  
Vol 18 (11) ◽  
pp. 3315-3323 ◽  
Author(s):  
Bin Zhang ◽  
Xiaoru Li ◽  
Qifan Wu ◽  
Chao Zhang ◽  
Yancun Yu ◽  
...  
Keyword(s):  
Pore Structure ◽  
Catalytic Conversion ◽  
Direct Conversion ◽  
Nanocrystalline Cellulose ◽  
Acidic Sites ◽  
High Yields

Direct conversion of cellulose to hexitols with high yields was achieved over NCC-templated Ni/mesoporous ZSM-5 catalysts.

Direct conversion of cellulose to high-yield methyl lactate over Ga-doped Zn/H-nanozeolite Y catalysts in supercritical methanol

2017 ◽  
Vol 19 (8) ◽  
pp. 1969-1982 ◽  
Author(s):  
Deepak Verma ◽  
Rizki Insyani ◽  
Young-Woong Suh ◽  
Seung Min Kim ◽  
Seok Ki Kim ◽  
...  
Keyword(s):  
Lignocellulosic Biomass ◽  
Value Added ◽  
Direct Conversion ◽  
High Yield ◽  
Supercritical Methanol ◽  
Methyl Lactate ◽  
High Yields

For realizing sustainable bio-based refineries, it is crucial to obtain high yields of value-added chemicalsviadirect conversion of cellulose and lignocellulosic biomass.

Effective catalytic conversion of cellulose into high yields of methyl glucosides over sulfonated carbon based catalyst

2012 ◽  
Vol 120 ◽  
pp. 318-321 ◽  
Author(s):  
Sambha Dora ◽  
Thallada Bhaskar ◽  
Rawel Singh ◽  
Desavath Viswanatha Naik ◽  
Dilip Kumar Adhikari
Keyword(s):  
Catalytic Conversion ◽  
High Yields ◽  
Carbon Based

Selective Conversion of CO2 and Switchable Alcohols into Linear or Cyclic Carbonates via Versatile Zinc Catalysis

Synthesis ◽  
2018 ◽  
Vol 51 (03) ◽  
pp. 739-746 ◽  
Author(s):  
Qing-Wen Song ◽  
Ping Liu ◽  
Qing-Ning Zhao ◽  
Jing-Yuan Li ◽  
Kan Zhang
Keyword(s):  
Noble Metal ◽  
Catalytic Conversion ◽  
Metal Catalyst ◽  
Cyclic Carbonates ◽  
Noble Metal Catalyst ◽  
Primary Alcohols ◽  
Selective Conversion ◽  
High Yields ◽  
Zinc Catalysis ◽  
Excellent Selectivity

It is promising and challenging to achieve the effective construction of carbonates using CO2 and a non-noble metal catalyst. Herein, selective catalytic conversion of CO2 and switchable alcohol candidates to produce linear or cyclic carbonates and α-hydroxy ketones via effective zinc catalyst was developed. A series of primary alcohols and cyclohexanol, 1,2-diols, and water can serve as nucleophiles to give alkyl or aryl 2-substituted-3-oxobutan-2-yl carbonates, substituted 1,3-dioxolan-2-ones, 3-substituted 3-hydroxybutan-2-ones, respectively with excellent selectivity and high yields.

scholarly journals Direct Conversion of Methane to Methanol on Ni-Ceria Surfaces: Metal–Support Interactions and Water-Enabled Catalytic Conversion by Site Blocking

2018 ◽  
Vol 140 (24) ◽  
pp. 7681-7687 ◽  
Author(s):  
Pablo G. Lustemberg ◽  
Robert M. Palomino ◽  
Ramón A. Gutiérrez ◽  
David C. Grinter ◽  
Mykhailo Vorokhta ◽  
...  
Keyword(s):  
Catalytic Conversion ◽  
Direct Conversion ◽  
Conversion Of Methane ◽  
Metal Support ◽  
Metal Support Interactions ◽  
Site Blocking

scholarly journals An Overview of Recent Developments in Hetero-Catalytic Conversion of Cellulosic Biomass

2020 ◽  
Vol 4 ◽  
pp. 43-54
Author(s):  
Mohamed Rashid Ahmed-Haras ◽  
Nhol Kao ◽  
Md. Sakinul Islam ◽  
Liam Ward
Keyword(s):  
Sulfuric Acid ◽  
Catalytic Conversion ◽  
Cellulose Hydrolysis ◽  
Nanocrystalline Cellulose ◽  
Cellulosic Biomass ◽  
Heterogeneous Catalytic ◽  
Research Activities ◽  
Acid Catalyzed ◽  
Solid Acids Catalysts ◽  
Hydrolysis Of

In recent years, research activities involved in the production of nanocellulosic materials have grown substantially, rapidly stimulating the development of innovative production techniques. These materials are chemically extracted by acid-catalyzed Hydrolysis of the renewable and widely available cellulosic biomass. In this regard, sulfuric acid-catalyzed Hydrolysis of cellulosic biomass is a commonly known method for the production of nanostructured cellulose. However, this method may result in many disadvantages, including short catalyst-lifetime, corrosive to the reactor materials and managing the spent sulfuric acid resulted from the production process. This dictates the implementation of an eco-industrial alternative for the catalytic production of nanocrystalline cellulose (NCC). A viable and practical alternative is the application of heterogeneous (solid acids) catalysts, which can be more conducive in providing favorable platforms for efficient cellulose hydrolysis. This review highlights the current production methods of nanocrystalline cellulose. Further, recent literature on the heterogeneous-catalytic conversion of cellulosic biomass is briefly discussed. The limitations and disadvantages of these techniques are also described.

Bi-functional heterogeneous iron complexes for catalytic conversion of epoxides to cyclic carbonates and their application in the synthesis of polyurethane

2018 ◽  
Vol 2 (6) ◽  
pp. 1312-1322 ◽  
Author(s):  
Shailesh Verma ◽  
Mohd. Nazish ◽  
Rukhsana I. Kureshy ◽  
Noor-ul H. Khan
Keyword(s):  
Heterogeneous Catalyst ◽  
Value Added ◽  
Catalytic Conversion ◽  
Iron Complexes ◽  
Direct Conversion ◽  
Cyclic Carbonates

The development of a sustainable heterogeneous catalyst for direct conversion of CO2 to value-added chemicals is of great interest.

Catalytic conversion of cellulose into 5-hydroxymethylfurfural in high yields via a two-step process

Cellulose ◽  
2011 ◽  
Vol 18 (5) ◽  
pp. 1327-1333 ◽  
Author(s):  
Xinhua Qi ◽  
Masaru Watanabe ◽  
Taku M. Aida ◽  
Richard L. Smith
Keyword(s):  
Catalytic Conversion ◽  
Step Process ◽  
High Yields

scholarly journals Direct Conversion from Carbon Dioxide to Luminescent Poly(β-alkoxyacrylate)s via Multicomponent Tandem Polymerization-Induced Emission

2021 ◽  
Author(s):  
Bo Song ◽  
Xiangyi Li ◽  
Anjun Qin ◽  
Ben Zhong Tang
Keyword(s):  
Carbon Dioxide ◽  
Direct Conversion ◽  
Decomposition Temperature ◽  
One Pot ◽  
Good Thermal Stability ◽  
Molecular Weights ◽  
Luminescent Polymers ◽  
High Yields ◽  
Esterification Reactions ◽  
Powerful Strategy

Using carbon dioxide (CO<sub>2</sub>) as a feedstock to synthesize various polymers has drawn much attention. One-pot multicomponent tandem polymerization (MCTP) with great synthetic simplicity and efficiency is a powerful strategy for the synthesis of new CO<sub>2</sub>-based luminescent polymers. In this work, we successfully developed a new one-pot MCTP combining three sequential carboxylation-cyclization-esterification reactions of CO<sub>2</sub>, diynes and alkyl dihalides to direct fixing CO<sub>2</sub> into luminescent polymers with aggregation-enhanced emission (AEE) property. This MCTP could be facilely carried out in <i>N,N</i>-dimethylacetamide in the presence of a cheap catalyst CuI and an organic base 7-methyl-1,5,7-triazabicyclo[4.4.0]dec-5-ene under atmospheric pressure. A series of poly(<i>β</i>-alkoxyacrylate)s with well-defined structures, high molecular weights (<i>M</i><sub>w</sub> up to 15 400) were obtained in high yields (up to 96%). The resultant polymers possess good thermal stability with high decomposition temperature and high char yield. Due to polymerization-induced emission (PIE) behavior, the non-luminescent monomers could be converted to luminescent poly(<i>β</i>-alkoxyacrylate)s with AEE features. Thus, this work provides a new pathway to directly transform CO<sub>2</sub> into luminescent polymers via a one-pot MCTP strategy.

scholarly journals Polyethylene upcycling to long-chain alkylaromatics by tandem hydrogenolysis/aromatization

Science ◽  
2020 ◽  
Vol 370 (6515) ◽  
pp. 437-441 ◽  
Author(s):  
Fan Zhang ◽  
Manhao Zeng ◽  
Ryan D. Yappert ◽  
Jiakai Sun ◽  
Yu-Hsuan Lee ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Waste Disposal ◽  
Reaction Temperature ◽  
Molecular Hydrogen ◽  
Catalytic Conversion ◽  
Weight Percent ◽  
Low Molecular Weight ◽  
Moderate Reaction ◽  
High Yields ◽  
Long Chain

The current scale of plastics production and the accompanying waste disposal problems represent a largely untapped opportunity for chemical upcycling. Tandem catalytic conversion by platinum supported on γ-alumina converts various polyethylene grades in high yields (up to 80 weight percent) to low-molecular-weight liquid/wax products, in the absence of added solvent or molecular hydrogen, with little production of light gases. The major components are valuable long-chain alkylaromatics and alkylnaphthenes (average ~C30, dispersity Ð = 1.1). Coupling exothermic hydrogenolysis with endothermic aromatization renders the overall transformation thermodynamically accessible despite the moderate reaction temperature of 280°C. This approach demonstrates how waste polyolefins can be a viable feedstock for the generation of molecular hydrocarbon products.

scholarly journals Direct Conversion from Carbon Dioxide to Luminescent Poly(β-alkoxyacrylate)s via Multicomponent Tandem Polymerization-Induced Emission

2021 ◽  
Author(s):  
Bo Song ◽  
Xiangyi Li ◽  
Anjun Qin ◽  
Ben Zhong Tang
Keyword(s):  
Carbon Dioxide ◽  
Direct Conversion ◽  
Decomposition Temperature ◽  
One Pot ◽  
Good Thermal Stability ◽  
Molecular Weights ◽  
Luminescent Polymers ◽  
High Yields ◽  
Esterification Reactions ◽  
Powerful Strategy

Using carbon dioxide (CO<sub>2</sub>) as a feedstock to synthesize various polymers has drawn much attention. One-pot multicomponent tandem polymerization (MCTP) with great synthetic simplicity and efficiency is a powerful strategy for the synthesis of new CO<sub>2</sub>-based luminescent polymers. In this work, we successfully developed a new one-pot MCTP combining three sequential carboxylation-cyclization-esterification reactions of CO<sub>2</sub>, diynes and alkyl dihalides to direct fixing CO<sub>2</sub> into luminescent polymers with aggregation-enhanced emission (AEE) property. This MCTP could be facilely carried out in <i>N,N</i>-dimethylacetamide in the presence of a cheap catalyst CuI and an organic base 7-methyl-1,5,7-triazabicyclo[4.4.0]dec-5-ene under atmospheric pressure. A series of poly(<i>β</i>-alkoxyacrylate)s with well-defined structures, high molecular weights (<i>M</i><sub>w</sub> up to 15 400) were obtained in high yields (up to 96%). The resultant polymers possess good thermal stability with high decomposition temperature and high char yield. Due to polymerization-induced emission (PIE) behavior, the non-luminescent monomers could be converted to luminescent poly(<i>β</i>-alkoxyacrylate)s with AEE features. Thus, this work provides a new pathway to directly transform CO<sub>2</sub> into luminescent polymers via a one-pot MCTP strategy.

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