scholarly journals Development of TiO2-Carbon Composite Acid Catalyst for Dehydration of Fructose to 5-Hydroxymethylfurfural

Catalysts ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 126 ◽  
Author(s):  
Morongwa Songo ◽  
Richard Moutloali ◽  
Suprakas Ray
Keyword(s):  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Direct Conversion ◽  
Carbon Composite ◽  
Industrial Applications ◽  
Optimum Conditions ◽  
X Ray Diffraction ◽  
Catalytic Cycles ◽  
Microwave Assisted Method

A TiO2-Carbon (TiO2C) composite was prepared using the microwave-assisted method and sulfonated using fuming sulfuric acid to produce a TiO2C solid acid catalyst. The prepared solid acid catalyst was characterised using scanning electron microscopy, Brunauer-Emmett-Teller analysis, Fourier transform infrared spectroscopy, and X-ray diffraction. Crystallinity analysis confirmed that TiO2C has an anatase structure, while analysis of its morphology showed a combination of spheres and particles with a diameter of 50 nm. The TiO2C solid acid catalyst was tested for use in the catalytic dehydration of fructose to 5-hydroxymethylfurfural (5-HMF). The effect of reaction time, reaction temperature, catalyst dosage, and solvent were investigated against the 5-HMF yield. The 5-HMF yield was found to be 90% under optimum conditions. The solid acid catalyst is very stable and can be reused for four catalytic cycles. Hence, the material has great potential for use in industrial applications and can be used for the direct conversion of fructose to 5-HMF because of its high activity and high reusability.

Sulfonated polymer impregnated carbon composite as a solid acid catalyst for the selective synthesis of furfural from xylose

2015 ◽  
Vol 56 (10) ◽  
pp. 1203-1206 ◽  
Author(s):  
Praveen K. Khatri ◽  
Neha Karanwal ◽  
Savita Kaul ◽  
Suman L. Jain
Keyword(s):  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Carbon Composite ◽  
Selective Synthesis

scholarly journals Sulfonated Mesoporous Silica-Carbon Composite Derived from a Silicate-Polyethylene Glycol Gel and Its Application as Solid Acid Catalysts

2021 ◽  
Vol 17 (1) ◽  
pp. 13-21
Author(s):  
Shofiyya Julaika ◽  
Agus Farid Fadli ◽  
Widiyastuti Widiyastuti ◽  
Heru Setyawan
Keyword(s):  
Acetic Acid ◽  
Polyethylene Glycol ◽  
Mesoporous Silica ◽  
Surface Area ◽  
Sodium Silicate ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Carbon Composite ◽  
Esterification Reaction

Solid acid catalyst is a promising alternative to the counterpart homogeneous acid for esterification reaction from the viewpoint of reusability and environmental concerns. This work aims to develop sulfonated mesoporous silica-carbon composite as solid acid catalyst for the esterification. The catalyst was synthesized from sodium silicate as the silica precursor and polyethylene glycol (PEG) as both carbon precursor and template via a sol-gel route in an aqueous system. Then, it was carbonized to produce mesoporous silica-carbon composite. Using the proposed method, the surface area of the silica-carbon composite could reach as high as 1074.21 m2/g. Although the surface area decreased to 614.02 m²/g when it was functionalized with sulfonate groups, the composite had a high ionic capacity of 5.3 mEq/g and exhibited high catalytic activity for esterification reaction of acetic acid with ethanol. At a reaction temperature of 80 °C, the acetic acid conversion reached 76.55% in 4 h. In addition, the catalyst had good reusability, which can be comparable with the commercial catalyst Foltrol F-007. It appears that the sulfonated silica-carbon composite prepared from sodium silicate using PEG as the carbon source a promising candidate as catalyst for esterification and the related area. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). 

Polymer impregnated sulfonated carbon composite solid acid catalyst for alkylation of phenol with methyl-tert-butyl ether

RSC Advances ◽  
2015 ◽  
Vol 5 (5) ◽  
pp. 3286-3290 ◽  
Author(s):  
Praveen K. Khatri ◽  
Manvi Manchanda ◽  
Indrajit K. Ghosh ◽  
Suman L. Jain
Keyword(s):  
Composite Material ◽  
Alkylating Agent ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Carbon Composite ◽  
Methyl Tert Butyl Ether ◽  
Butyl Ether ◽  
Autogenous Pressure ◽  
Composite Solid

A polymer impregnated sulfonated carbon composite solid acid catalyst was synthesized via sulfonation of a composite material and used for the alkylation of phenol using methyl-tert-butyl ether as an alkylating agent in a pressure reactor under autogenous pressure.

Direct Conversion of Glucose in Ethanol and Ethanol/Water Mixed Medium

2013 ◽  
Vol 291-294 ◽  
pp. 312-315 ◽  
Author(s):  
Chun Chang ◽  
Bo Li ◽  
Gui Zhuan Xu ◽  
Pei Qin Sun
Keyword(s):  
Sulfuric Acid ◽  
Opposite Effect ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Direct Conversion ◽  
Rich Medium ◽  
Water Addition ◽  
Ethanol Medium ◽  
Mixed Medium

Eethyl levulinate (EL) can be produced by direct conversion of glucose in ethanol medium. Both sulfuric acid and solid acid catalyst (USY) can be used as effective acid catalyst. The maximum EL yields were almost same. However, the usage of USY is helpful to limit the diethyl ether (DEE) production efficiently for recycling of ethanol. In ethanol/water mixed medium, water addition has significant effect on the products distribution. EL yield decreased obviously in water-rich medium. Meanwhile, the amount of DEE decreased with the increase of water addition. However, water addition has the opposite effect on the humic solid formation, and more humic solid can be formed in water-rich medium.

scholarly journals A SYNTHESIS OF SOLID ACID CATALYSTS FOR USING IN HYDROLYSIS OF CELLULOSE FROM RICE STRAW INTO GLUCOSE

2018 ◽  
Vol 55 (1B) ◽  
pp. 145
Author(s):  
T-Que Phuong Phan
Keyword(s):  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Hydrothermal Carbonization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Hydrolysis Of Cellulose ◽  
Ft Ir ◽  
Physical And Chemical ◽  
Hydrolysis Of

In this study, a carbon–based solid acid catalyst was prepared via hydrothermal carbonization method (HTC) using glucose and pyrolysed waste tyre as carbon precursors and aqueous solution of H2SO4 as sulfonation agent. Prepared catalysts were characterized by X–ray diffraction (XRD), scanning electron microscope (SEM), Fourier transform infrared FT–IR and Brunauer–Emmett–Teller (BET). As the result, catalysts were manufactured with the appropriate physical and chemical characteristics and high acidity.

scholarly journals Direct conversion of glucose to 5-hydroxymethylfurfural using a mixture of niobic acid and niobium phosphate as a solid acid catalyst

Fuel ◽  
2017 ◽  
Vol 210 ◽  
pp. 67-74 ◽  
Author(s):  
Mariana N. Catrinck ◽  
Emerson S. Ribeiro ◽  
Robson S. Monteiro ◽  
Rogério M. Ribas ◽  
Márcio H.P. Barbosa ◽  
...  
Keyword(s):  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Direct Conversion ◽  
Niobic Acid ◽  
Niobium Phosphate

scholarly journals Synthesis of Polytetrahydrofuran Using Protonated Kaolin as A Solid Acid Catalyst

2019 ◽  
Vol 14 (2) ◽  
pp. 294
Author(s):  
Abdelhak Moumen ◽  
Zhour Hattab ◽  
Youghourta Belhocine ◽  
Kamel Guerfi ◽  
Nacer Rebbani
Keyword(s):  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Analytical Techniques ◽  
Acid Catalyst ◽  
Crystalline Substance ◽  
High Catalytic Activity ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Ft Ir

In this work, a non-toxic protonated kaolin clay exchanged with protons, was successfully applied as a solid acid catalyst for the polymerization of tetrahydrofuran (poly(THF)) at room temperature in the presence of acetic anhydride. Prior to using the kaolin as a catalyst, it was treated with HCl (0.1 M) and characterized using various analytical techniques. The amounts of catalyst and reaction time on the conversion of THF were investigated. Characterizations of nuclear magnetic Resonance of proton (1H-NMR), Fourier Transform Infrared spectroscopy (FT-IR), X-ray Diffraction (XRD), Optical Microscopy (OM), and Differential Scanning Calorimetry (DSC) techniques were used to examine the resulting polymer. X-ray characterization and DSC data indicated that the obtained poly(THF) is a highly crystalline substance. The results showed that protonated kaolin (kaolin–H+) has a high catalytic activity for the polymerization of THF with a conversion rate of 50.02% after 20 hours. Copyright © 2019 BCREC Group. All rights reserved. 

A Novel Sulfonated Carbon Composite Solid Acid Catalyst for Biodiesel Synthesis

2008 ◽  
Vol 123 (1-2) ◽  
pp. 1-6 ◽  
Author(s):  
Xunhua Mo ◽  
Edgar Lotero ◽  
Changqing Lu ◽  
Yijun Liu ◽  
James G. Goodwin
Keyword(s):  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Carbon Composite ◽  
Biodiesel Synthesis ◽  
Composite Solid
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