The control of pore size in alumina catalyst supports: A review

1986 ◽  
Vol 21 (2) ◽  
pp. 215-238 ◽  
Author(s):  
D.L. Trimm ◽  
A. Stanislaus
Keyword(s):  
Pore Size ◽  
Catalyst Supports ◽  
Alumina Catalyst

scholarly journals Investigation of Salt and precipitating agent effect on the specific surface area and compressive strength of alumina catalyst support

2017 ◽  
Vol 19 (3) ◽  
pp. 35-40 ◽  
Author(s):  
Mostafa Mahmoudian ◽  
Alireza Hemmati ◽  
Hasan Hashemabadi ◽  
Ahad Ghaemi ◽  
Shahrokh Shahhosseini
Keyword(s):  
Compressive Strength ◽  
Specific Surface ◽  
Pore Size ◽  
Surface Area ◽  
Specific Surface Area ◽  
Sol Gel ◽  
Catalyst Support ◽  
Catalyst Supports ◽  
Chloride Salt ◽  
Alumina Catalyst

Abstract Nowadays, catalyst supports are extensively used to decrease the costs and increase the contact surface area in chemical reactions. Specific surface area, compressive strength, pore volume and pore size are some of the most important characteristics of a catalyst support. In this work, Sol-gel and peptization methods were applied to produce alumina catalyst support. Also the roles of aluminum salts and precipitating agents on the specific surface area and compressive strength of alumina catalyst support were investigated. In addition, various additives and common methods in the increasing surface area, compressive strength and adjusting the porosity and pore size are used in this study. The results show that using caustic soda as precipitating agent and aluminum chloride salt yields catalyst supports with the best compressive strength. Also, using aluminum nitrate and ammonia as precipitating agent produced alumina catalyst support with the highest specific surface area.

Sol–gel synthesis of titania–alumina catalyst supports

2002 ◽  
Vol 235 (1-2) ◽  
pp. 71-78 ◽  
Author(s):  
E.Y Kaneko ◽  
S.H Pulcinelli ◽  
V Teixeira da Silva ◽  
C.V Santilli
Keyword(s):  
Sol Gel ◽  
Catalyst Supports ◽  
Alumina Catalyst ◽  
Sol Gel Synthesis

Effect of seeding during precursor preparation on the pore structure of alumina catalyst supports

1993 ◽  
Vol 1 (6) ◽  
pp. 423-430 ◽  
Author(s):  
N.G. Papayannakos ◽  
A.M. Thanos ◽  
Y.E. Kaloidas
Keyword(s):  
Pore Structure ◽  
Catalyst Supports ◽  
Alumina Catalyst

scholarly journals Numerical Simulation of Hindered Diffusion inγ-Alumina Catalyst Supports

2017 ◽  
Vol 72 (2) ◽  
pp. 8 ◽  
Author(s):  
Haisheng Wang ◽  
François Willot ◽  
Maxime Moreaud ◽  
Mickaël Rivallan ◽  
Loïc Sorbier ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Catalyst Supports ◽  
Alumina Catalyst ◽  
Hindered Diffusion

Experimental and statistical assessments of the mechanical strength reliability of gamma alumina catalyst supports

Particuology ◽  
2015 ◽  
Vol 21 ◽  
pp. 74-81 ◽  
Author(s):  
Abdolreza Samimi ◽  
Mozhgan Zakeri ◽  
Basir Maleki ◽  
Davod Mohebbi-Kalhori
Keyword(s):  
Mechanical Strength ◽  
Catalyst Supports ◽  
Gamma Alumina ◽  
Alumina Catalyst

scholarly journals Tortuosity of mesoporous alumina catalyst supports: Influence of the pore network organization

2017 ◽  
Vol 248 ◽  
pp. 91-98 ◽  
Author(s):  
Svetan Kolitcheff ◽  
Elsa Jolimaitre ◽  
Antoine Hugon ◽  
Jan Verstraete ◽  
Pierre-Louis Carrette ◽  
...  
Keyword(s):  
Pore Network ◽  
Mesoporous Alumina ◽  
Catalyst Supports ◽  
Network Organization ◽  
Alumina Catalyst

The synthesis by deposition–precipitation of porous γ-alumina catalyst supports on glass substrates compatible with microreactor geometries

2005 ◽  
Vol 110 (1-2) ◽  
pp. 53-57 ◽  
Author(s):  
Serguei Belochapkine ◽  
John Shaw ◽  
David Wenn ◽  
Julian R.H. Ross
Keyword(s):  
Catalyst Supports ◽  
Alumina Catalyst ◽  
Glass Substrates

Preparation of alumina catalyst supports and NiMo/Al2O3 catalysts

1993 ◽  
Vol 10 (2) ◽  
pp. 112-123 ◽  
Author(s):  
Young-Woo Rhee ◽  
James A. Guin
Keyword(s):  
Catalyst Supports ◽  
Alumina Catalyst

Pyrolysis of Polystyrene: The Influence of Commercially Available Oxides as Catalysts

2019 ◽  
Vol 41 (5) ◽  
pp. 779-779
Author(s):  
Jan Nisar Jan Nisar ◽  
Muhammad Sufaid Khan Muhammad Sufaid Khan ◽  
Ghulam Ali Ghulam Ali ◽  
Afzal Shah Afzal Shah ◽  
Rafaqat Ali Khan Rafaqat Ali Khan ◽  
...  
Keyword(s):  
Pore Size ◽  
Surface Area ◽  
Silica Gel ◽  
Physicochemical Characteristics ◽  
Inert Atmosphere ◽  
Maximum Temperature ◽  
Key Factors ◽  
Alumina Catalyst ◽  
Small Surface ◽  
Acidic Sites

In this study four catalysts (ƴ –Alumina, α- Alumina, silica gel and silica ppt) with different physicochemical characteristics were tested for the pyrolysis of polystyrene (PS) under inert atmosphere in the temperature range 200-650 and#176;C at heating rate 5 and#176;C/min. The silica gel a mesoporous catalyst, with a greater pore size and surface area was found to be the most active materials in terms of reduction in maximum temperature. The ƴ –Alumina catalyst also shows good result because of the acidic sites, surface area, and pores size, however, its degradation effect is less than silica gel. The effect of α- Alumina catalyst on the pyrolysis of PS is less pronounced due to its small surface area, pore size and lack of acidic sites on its surface. The effects of these catalysts show that surface area, number of acidic sites and pore size were observed as the key factors for effective degradation of polymers.

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