Open AccessJournal Article
Alpha, Beta and Gamma Alumina as a catalyst -A Review
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TLDR
In this article, the Gamma Alumina/Modified Gamma alumina catalyst for the study of selectivity of Meta cresol in Alkylation of phenol is presented.Abstract:
Alpha (α), Beta (β) and gamma (ƴ) are the different phases of Alumina. The α- Alumina is also known as Nano alumina and is white puffy powder. The specific surface area is low, resistant to high temperature and inert, but it does not belong to activated alumina, and it has almost no catalytic activity. β- Alumina is hexagonal, with lamellar structure and the unit cell contains two alumina spinel based block. ƴ -Alumina is nano alumina and has high purity and excellent dispersion and high specific surface, with resistance to high temperature and inert, high activity. Porous, hence it is a kind of activated alumina and used as catalyst support and adsorbent. Aim is to use ƴ-alumina catalyst for Alkylation of phenol for Meta cresol selectivity. Literature survey indicates that its use has been studied for selectivity and yield of o cresol, 2,6 xylenol but not for meta selectivity for the reaction-Alkylation of phenol. Challenge is to develop Gamma Alumina/Modified Gamma alumina catalyst for the study of selectivity of Meta cresol in Alkylation of phenol.read more
Citations
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γ-Al2O3 supported/Co-Cr-B catalyst for hydrogen evolution via NH3BH3 hydrolysis
TL;DR: In this article, the Co-Cr-B catalyst effect supported on γ-Al2O3 to produce hydrogen (HG) from ammonia-borane hydrolysis (ABH) was investigated.
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Synthesis And Characterization Of CoMo/Mordenite Catalyst For Hydrotreatment Of Lignin Compound Models
TL;DR: In this paper, the synthesis of CoMo/Mordenite catalysts was conducted using a co-impregnation method at a various Co/Mo ratios, and the produced catalysts were then characterized by X-ray diffraction, total acidity analysis, and scanning electron microscopy.
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Boosting brackish water treatment via integration of mesoporous γ-Al2O3NPs with thin-film nanofiltration membranes
TL;DR: In this article , a simple method based on non-ionic surfactant polysorbates-80 was used to create mesoporous γ-Al2O3NPs.
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Performance enhancement of a basin solar still using γ-Al2O3 nanoparticles and a mixer: an experimental approach
TL;DR: In this article, a single slope basin solar still in the presence of a mixer was used for pure water production in a solar still, and the results showed that 3 mass% of nanoparticles increased the distillate yield by about 6003% Due to more water evaporation in experiments with nanoparticles, the water depth reduction is more than the experiments without adding nanoparticles.
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Multi-tube tantalum membrane reactor for HIx processing section of IS thermochemical process
B.C. Nailwal,B.C. Nailwal,Nitesh Goswami,R.K. Lenka,A.K. Singha,H.Z. Fani,A.S. Rao,Abhijit Ghosh,Ramesh C. Bindal,Ramesh C. Bindal,Sadhana Mohan,Sadhana Mohan,Soumitra Kar,Soumitra Kar +13 more
TL;DR: In this paper, a 4-tube packed bed catalytic tantalum (Ta) membrane reactor (MR) for enhanced HI decomposition is reported. But the results were limited to the Iodine-Sulphur (IS) thermochemical cycle.
References
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Journal ArticleDOI
Al-MCM-41 catalysed alkylation of phenol with methanol
TL;DR: In this paper, mesoporous Al-MCM-41 molecular sieve materials with three different SiO2/Al2O3 ratios were used as catalysts for phenol methylation with methanol as the alkylating agent.
Journal ArticleDOI
Synthesis of large-mesoporous γ-Al2O3 from coal-series kaolin at room temperature
TL;DR: In this article, the mesoporous gamma-Al2O3 has been successfully synthesized from calcined coal-series kaolin by using cetyltrimethylammonium bromide (CTAB) as template at room temperature.
Journal Article
Preparation of ?-alumina foams of high surface area employing the polyurethane sponge replica method
Ángela B. Sifontes,M. Urbina,F. Fajardo,Luis Melo,Luis Melo,L. García,Marta Mediavilla,Nereida Carrión,Joaquín L Brito,Petra H. Hernández,Roger Solano,G. Mejias,A. Quintero +12 more
TL;DR: In this article, a single phase polyurethane sponge template was used as a template for the preparation of single phase ceramic foams with high surface area and porosity, and the results showed that at least four cycles of re-coating followed by drying were required before cal-cination to prevent collapse of the ceramic foam.
Journal Article
Application of Novel Gamma Alumina Nano Structure for Preparation of Dimethyl ether from Methanol
Ali Eliassi,Maryam Ranjbar +1 more
TL;DR: In this article, preparation of nano-sized gamma alumina with high specific surface area and high yield by thereaction between aluminum nitrate and sodium carbonate, without using any surfactant is reported.
Journal ArticleDOI
The study of thermal effect on the surface properties of gamma-alumina synthesied from kankara kaolin.
SG Bawa,A.S. Ahmed,PC Okonkwo +2 more
TL;DR: In this paper, the surface properties of gamma-alumina were determined using the BER technique and the results showed that the pore size and pore volume range from 15nm to 25nm and 0.5cm 3/g to 0.8cm 3 /g respectively.