Impacts of Alumina Introduction on a Pt–SO4/ZrO2 Catalyst in Light Naphtha Isomerization

2022 ◽  
Author(s):  
Sinong Zhou ◽  
Yueqin Song ◽  
Jigang Zhao ◽  
Xiaolong Zhou
Keyword(s):  
Light Naphtha ◽  
Zro2 Catalyst

Hydrogenolysis of glucose and fructose in glycol solutions over CuO-MgO-ZrO2 catalyst

2020 ◽  
pp. 48-55
Author(s):  
M.E. Sharanda ◽  
◽  
E.A. Bondarenko ◽  
Keyword(s):  
Ethylene Glycol ◽  
Propylene Glycol ◽  
Flow Reactor ◽  
General Trend ◽  
Raw Materials ◽  
Reaction Products ◽  
Renewable Raw Materials ◽  
High Partial Pressure ◽  
Zro2 Catalyst ◽  
Phase Process

Ethylene glycol and propylene glycol are important representatives of polyols. On an industrial scale, they are obtained from petrochemical raw materials. Within a decade, significant efforts were made for the producing of polyols from biologically renewable raw materials - carbohydrates. The general trend for carbohydrate hydrogenolysis includes application of liquid-phase process with the use of modified metal-oxide catalysts, at 120-120 ° C and pressure of 3MPa or above. So high pressure is used for the reason to increase hydrogen solubility, and also due to the high partial pressure of low boiling solvents. We supposed that usage of high boiling solvents could allow hydrogenolysis to be performed at the lower pressure. Ethylene glycol and propylene glycol are of particular interest as such kind of solvent since they are both the main products of glucose hydrogenolysis. In this work, the process of hydrogenolysis of glucose and fructose over Cu / MgO-ZrO2 catalyst have been studied at temperature range of 160-200 °C and a pressure of 0.1-0.3 MPa in a flow reactor. The solvents were simultaneously the target products of the reaction - ethylene glycol and / or propylene glycol. Gas chromatography and 13C NMR were used for the reaction products identification. It was found that the solubility of glucose in propylene glycol is 21 % by weight, and in ethylene glycol 62% by weight. It was pointed out that the process of hydrogenolysis can take place at a pressure close to atmospheric. Under these conditions, the conversion of hexoses reaches 96-100 %. The reaction products are preferably propylene glycol and ethylene glycol. The total selectivity for C3-2 polyols is 90-94 %, that is higher than in the hydrogenolysis of glucose in aqueous solution.

Chemoselective Hydrogenation of Cinnamaldehyde over Tailored Oxygen Vacancy Rich Pd@ZrO2 Catalyst

2021 ◽  
Author(s):  
Komal N. Patil ◽  
Divya Prasad ◽  
Jayesh T. Bhanushali ◽  
Bhalchandra Kakade ◽  
Arvind H. Jadhav ◽  
...  
Keyword(s):  
Oxygen Vacancy ◽  
Selective Hydrogenation ◽  
Oxygen Vacancies ◽  
Synthesis Method ◽  
Chemoselective Hydrogenation ◽  
Zro2 Catalyst ◽  
Industrial Relevance

Selective hydrogenation of cinnamaldehyde to hydrocinnamaldehyde is captivating due to its industrial relevance. Herein, two-step synthesis method was adopted to develop oxygen vacancies in Pd@ZrO2 catalysts. The oxygen vacancies were...

Elementary Kinetic Mean Field Modelling of the Lean NOx Reduction by H2 on Pt/WO3/ZrO2 Catalyst

2016 ◽  
Vol 60 (3-5) ◽  
pp. 238-242 ◽  
Author(s):  
C. Hahn ◽  
M. Endisch ◽  
S. Kureti
Keyword(s):  
Nox Reduction ◽  
Mean Field ◽  
Field Modelling ◽  
Lean Nox Reduction ◽  
Lean Nox ◽  
Zro2 Catalyst

Dimethyl Ether Conversion to Olefins over the SAPO-34/ZrO2 Catalysts: Effect of the ZrO2 Supporter

2011 ◽  
Vol 347-353 ◽  
pp. 3681-3684 ◽  
Author(s):  
Young Ho Kim ◽  
Su Gyung Lee ◽  
Byoung Kwan Yoo ◽  
Han Sol Je ◽  
Chu Sik Park
Keyword(s):  
Physicochemical Properties ◽  
Dimethyl Ether ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Coke Deposition ◽  
Light Olefins ◽  
Similar Activity ◽  
Dimethyl Ether Conversion ◽  
Zro2 Catalyst ◽  
Catalyst Lifetime

A SAPO-34 catalyst is well known to be one of the best catalysts for DME to olefins (DTO) reaction. Main products of the reaction were light olefins such as ethylene, propylene and butenes. However, the main problem is rapid deactivation of the SAPO-34 catalyst due to coke deposition during DTO reaction. In this study, various SAPO-34/ZrO2 catalysts added with ZrO2 were prepared for improving the lifetime and their physicochemical properties have been characterized by XRD and SEM. The DTO reaction over various SAPO-34/ZrO2 catalysts was carried out using a fixed bed reactor. All SAPO-34/ZrO2 catalysts showed similar activity and selectivity in the DTO reaction. The SAPO-34(9wt%)/ZrO2 catalyst was showed the best performance for the catalyst lifetime.

Effect of the tungsten precursor on the high activity of the WO3/ZrO2 catalyst in the oxidative lactonization of 1,2-benzenedimethanol

2012 ◽  
Vol 435-436 ◽  
pp. 141-147 ◽  
Author(s):  
Quanjing Zhu ◽  
Xiaofeng Chu ◽  
Zhaoyan Zhang ◽  
Wei-Lin Dai ◽  
Kangnian Fan
Keyword(s):  
High Activity ◽  
Zro2 Catalyst

scholarly journals Yttrium stabilization and Pt addition to Pd/ZrO2 catalyst for the oxidation of methane in the presence of ethylene and water

RSC Advances ◽  
2021 ◽  
Vol 11 (20) ◽  
pp. 11910-11917
Author(s):  
Hassnain Abbas Khan ◽  
Junyu Hao ◽  
Omar El Tall ◽  
Aamir Farooq
Keyword(s):  
Oxidation Of Methane ◽  
Zro2 Catalyst ◽  
P Addition

Addition of 8.0% Yttrium (Y) to ZrO2 substantially increased the activity and stability of Pd/ZrO2.

Efficient one-pot hydrogenolysis of biomass-derived xylitol into ethylene glycol and 1,2-propylene glycol over Cu–Ni–ZrO2 catalyst without solid bases

2019 ◽  
Vol 28 ◽  
pp. 101-106 ◽  
Author(s):  
Shenglin Li ◽  
Yifan Zan ◽  
Yuanyuan Sun ◽  
Zhichao Tan ◽  
Gai Miao ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Propylene Glycol ◽  
One Pot ◽  
Solid Bases ◽  
Zro2 Catalyst
Sign in / Sign up

Export Citation Format

Share Document