The catalytic dehydrogenation of ethanol by heterogeneous catalysts

2021 ◽  
Author(s):  
Yongji Huang ◽  
Bin Wang ◽  
Hangkong Yuan ◽  
Yubin Sun ◽  
Dongyuan Yang ◽  
...  
Keyword(s):  
Heterogeneous Catalyst ◽  
Heterogeneous Catalysts ◽  
Catalytic Dehydrogenation ◽  
Recent Advances ◽  
Dehydrogenation Of Ethanol

In this review, recent advances in the catalytic dehydrogenation of ethanol to acetaldehytde with the release of hydrogen catalyzed by a heterogeneous catalyst aresummerized and discussed.

The Synthesis and Application of Functionalized Mesoporous Silica SBA-15 as Heterogeneous Catalyst in Organic Synthesis

2020 ◽  
Vol 24 ◽  
Author(s):  
Ghodsi Mohammadi Ziarani ◽  
Shima Roshankar ◽  
Fatemeh Mohajer ◽  
Alireza Badiei
Keyword(s):  
Mesoporous Silica ◽  
Heterogeneous Catalyst ◽  
Organic Synthesis ◽  
Lewis Acid ◽  
Heterogeneous Catalysts ◽  
Organic Transformations ◽  
Functionalized Mesoporous Silica ◽  
Silica Nanomaterials ◽  
Wide Range ◽  
Target Molecules

Abstract:: Mesoporous silica nanomaterials provide an extraordinary advantage for making new and superior heterogeneous catalysts because of their surface silanol groups. The functionalized mesoporous SBA-15, such as acidic, basic, BrÖnsted, lewis acid, and chiral catalysts, are used for a wide range of organic synthesis. The importance of the chiral ligands, which were immobilized on the SBA-15, was mentioned in this review to achieve chiral products as valuable target molecules. Herein, their synthesis and application in different organic transformations are reviewed from 2016 till date 2020.

Effect of Calcination Temperature and Time on Waste Heterogeneous Catalysts for Biodiesel Production

2016 ◽  
Vol 707 ◽  
pp. 161-165 ◽  
Author(s):  
Sarina Sulaiman ◽  
Siti Rohana
Keyword(s):  
Optimum Condition ◽  
Heterogeneous Catalyst ◽  
Calcination Temperature ◽  
Heterogeneous Catalysts ◽  
Fish Bone ◽  
Biodiesel Production ◽  
Calcination Time ◽  
Mixed Waste ◽  
Homogenous Catalyst

This paper studies the effect of calcination time and temperature of mixed waste catalyst for optimization of FAME yield. Fish bone and mixture of coconut waste and eggshells were used to catalyzed the transesterification process. The parameter was tested on different calcination condition and the result shows that the optimum condition was achieved at condition 800 °C, 2 hours was 80.3 wt% of FAME yield for mixed coconut waste and eggshells and 85 wt% were obtained at 900 °C for fish bone catalyst at 225 rpm, 12:1 methanol to oil ratio and amount of catalyst, 3wt%. It can be concluded that waste heterogeneous catalyst exhibits as a cheaper substitute to the homogenous catalyst.

scholarly journals Recent advances in cobalt based heterogeneous catalysts for oxygen evolution reaction

2020 ◽  
Vol 511 ◽  
pp. 119854 ◽  
Author(s):  
Afreenuzzaman Badruzzaman ◽  
Afdhal Yuda ◽  
Anchu Ashok ◽  
Anand Kumar
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Heterogeneous Catalysts ◽  
Recent Advances

scholarly journals Recent advances on the utilization of layered double hydroxides (LDHs) and related heterogeneous catalysts in a lignocellulosic-feedstock biorefinery scheme

2017 ◽  
Vol 19 (22) ◽  
pp. 5269-5302 ◽  
Author(s):  
Willinton Y. Hernández ◽  
Jeroen Lauwaert ◽  
Pascal Van Der Voort ◽  
An Verberckmoes
Keyword(s):  
Liquid Phase ◽  
Layered Double Hydroxides ◽  
Heterogeneous Catalysts ◽  
Recent Advances ◽  
Lignocellulosic Feedstock ◽  
Different Types ◽  
Double Hydroxides

Layered double hydroxides (LDHs) and derived materials have been widely used as heterogeneous catalysts for different types of reactions either in gas or in liquid phase.

FeCl3–SiO2 as heterogeneous catalysts for the preparation of dihydropyrano[3,2-b]chromenediones

2011 ◽  
Vol 76 (12) ◽  
pp. 1791-1797 ◽  
Author(s):  
Wei-Lin Li ◽  
Jin-Ying Liang ◽  
Tian-Bao Wang ◽  
Ya-Qin Yang
Keyword(s):  
Heterogeneous Catalyst ◽  
Heterogeneous Catalysts ◽  
Solid Acid ◽  
Kojic Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Environment Friendly ◽  
Appreciable Change

FeCl3–SiO2 is environment-friendly heterogeneous catalyst for the condensation of kojic acid and aldehydes with dimedone to afford dihydropyrano[3,2-b]chromenediones. The solid acid catalyst is stable and can be easily recovered and reused without appreciable change in its efficiency.

Recent Advances in Electrochemical CO2 -to-CO Conversion on Heterogeneous Catalysts

2018 ◽  
Vol 30 (48) ◽  
pp. 1802066 ◽  
Author(s):  
Tingting Zheng ◽  
Kun Jiang ◽  
Haotian Wang
Keyword(s):  
Heterogeneous Catalysts ◽  
Recent Advances ◽  
Co Conversion

scholarly journals TRANSESTERIFIKASI MINYAK BIJI KARET (Hevea brasiliensis) MENGGUNAKAN KATALIS HETEROGEN CANGKANG KEPITING LIMBAH SEAFOOD TERMODIFIKASI K2O

Jurnal Kimia ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 1 ◽  
Author(s):  
N. K. D. Astuti ◽  
I N. Simpen ◽  
I W. Suarsa
Keyword(s):  
Methyl Ester ◽  
Heterogeneous Catalyst ◽  
Hevea Brasiliensis ◽  
Heterogeneous Catalysts ◽  
Seed Oil ◽  
Molar Ratio ◽  
Impregnation Method ◽  
Crab Shell ◽  
Rubber Seed Oil ◽  
Rubber Seed

The CaO heterogeneous catalysts can be prepared by CaCO3 calcination process, with one source of CaCO3 being a crab shell from seafood waste. The preparation of the heterogeneous catalyst was successfully carried out by modification with KOH using a wet impregnation method at 800oC for 5 hours. The purpose of this research is to determine the physical and chemical characteristics of heterogeneous catalyst of K2O-modified crab shell and to examine the heterogeneous catalyst of K2O-modified shells in converting rubber seed oil into biodiesel. The results showed that the lowest basic alkalinity possessed without modified catalyst (1.0428 mmol g-1) and the highest alkali possessed potassium-modified catalyst (1.8314 mmol g-1). Characterization of specific surface area of ??crab shells without and with modified K2O were relatively the same. The surface morphology of the catalyst without and K2O modified was uniform. The catalyst examination results for conversion of rubber seed oil (Hevea brasiliensis) to biodiesel, the optimum catalyst concentration of 3% and the molar ratio of oil:methanol of 1:9 capable converting to biodiesel with the yield of 91.05%. The content of biodiesel were stearic methyl ester, linoleic methyl ester, linolenic methyl ester, and palmitic methyl ester.

Evaluation of heterogeneous photo-Fenton oxidation of Orange II using response surface methodology

2010 ◽  
Vol 62 (6) ◽  
pp. 1320-1326 ◽  
Author(s):  
Y. H. Gong ◽  
H. Zhang ◽  
Y. L. Li ◽  
L. J. Xiang ◽  
S. Royer ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Heterogeneous Catalyst ◽  
Uv Irradiation ◽  
Heterogeneous Catalysts ◽  
Ph Value ◽  
Dye Degradation ◽  
High Catalytic Activity ◽  
Orange Ii ◽  
Initial Ph

A mesoporous SBA-15 doped iron oxide (Fe2O3/SBA-15) was synthesized by co-codensation, characterized and used as heterogeneous catalysts for the photo-Fenton decolorization of azo dye Orange II under UV irradiation. Response surface methodology (RSM) was used to investigate operating condition effects, such as hydrogen peroxide concentration, initial pH and catalyst loadings, on the decolorization rate. UV irradiation is found to enhance the activity of the catalyst in the process. RSM analysis evidenced the influence of the initial pH value and H2O2 concentration on the dye degradation rate. The coupled UV/Fe2O3/SBA-15/H2O2 process at room temperature is revealed as a promising friendly process for wastewater treatment. Indeed, the use of a heterogeneous catalyst allows an easy active phase recycling without multi-step recovering while the heterogeneous catalyst used here exhibits high catalytic activity for the reaction considered.

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