Abdul Mahomed

Abdul Mahomed
University of KwaZulu-Natal | ukzn · Department of Chemistry

PhD

About

26
Publications
4,317
Reads
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319
Citations
Additional affiliations
November 2015 - present
University of KwaZulu-Natal
Position
  • Professor (Associate)
Description
  • Senior lecturer and researcher in catalysis, materials synthesis and analysis, and analytical chemistry.
February 2004 - June 2013
Suid Afrikaanse Steenkool en Olie, Sasol
Position
  • Researcher
Description
  • Worked as a Principal Scientist at SASOL R&D. Expertise in heterogeneous catalysis in the area of oxidation, hydrogenation, dehydrogenation, methanol synthesis, Fe-FT
Education
January 2001 - December 2003
University of KwaZulu-Natal
Field of study
  • Catalysis

Publications

Publications (26)
Article
VOx/TiO2 is a popular material for application in various catalytic reactions. The dehydrogenation ability of V³⁺ and significant performance of TiO2 in CO2 activation flag this family of catalysts as promising candidates for CO2-assisted dehydrogenation of alkanes. Therefore, catalysts containing monomeric VOx species and polymeric VOx species sup...
Article
Selective hydrogenolysis of glycerol to propanol is a sustainable reaction, which can play a critical role in the future of the propylene market, as one step dehydration of this sustainable propanol provides access to sustainable propylene. In this work, Copper (Cu) – Tungstosilicic acid (HSiW) catalysts were studied for the hydrogenolysis of glyce...
Article
We report findings of a structural characterization of VOx/MgO powders prepared by a stoichiometric solution combustion synthesis using five different fuels. Characterization of the synthesized powders was done using X-ray diffraction, Raman spectroscopy, Inductively Coupled Plasma Emission Spectroscopy, Scanning Electron Microscopy and Aberration...
Article
The effect of CO2 on the dehydrogenation of n-octane over Cr-Fe oxides supported on MgAl2O4 (MgAl) was investigated. Addition of Fe as a promoter facilitated the formation of Cr-O-Fe polymeric units, stabilizing the CrOx in the +3 state on the catalysts’ surface. Catalytic results revealed that the 2Cr-Fe catalyst was the most active and also stabl...
Article
The hydrogenation of CO2 to methanol was performed over Ga2O3 and ZrO2 modified Cu-Zn based catalysts. The prepared catalysts were characterised via P-XRD, ICP-OES, BET, SEM-EDX, H2-TPR, CO2-TPD, H2-TPD and H2-chemisorption. The focus of this investigation was to assess the role of Ga2O3 and ZrO2 promoters on improving the methanol productivity ove...
Article
Methane, a highly abundant greenhouse gas with a high global warming potential, is a relatively clean fuel due to its high H/C ratio. This study has taken a unique approach to discover key fundamentals during the solution combustion synthesis of Pd0.03Ce0.97O2-δ catalysts characterised using several physicochemical techniques. Oxygen vacancies were...
Article
TiO2 catalysts with varied composition of anatase and rutile were prepared and tested for the oxidative activation of n-octane. The rutile phase of TiO2 was found to be inactive due to its relatively low reducibility and surface area. The anatase phase, however, was active. Also, a mixture of anatase and rutile, with an excess of rutile favoured th...
Article
Full-text available
Manganese oxide with varying weight loadings (2, 9 and 18 wt%) were supported on SBA-15 and used to investigate the oxidative dehydrogenation of n-octane. Wet impregnation was used firstly to synthesize catalysts with larger clusters of manganese oxide on the surface of the SBA-15 support. In addition, deposition precipitation was used to prepare c...
Article
The propensity of a range of monometallic oxide catalysts, namely, TiO2; V2O5; Cr2O3; MnO2; Fe2O3; Co3O4; CuO; ZnO; and CeO2, to form carbon oxides during the oxidative activation of n-octane was investigated. The catalysts showed varied selectivity at iso-conversion. PXRD, BET surface area analysis, H2-TPR, NH3-TPD and O2-TPD were employed to prob...
Article
Manganese oxide with varying weight loadings (2, 9 and 18 wt%) were supported on SBA-15 and used to investigate the oxidative dehydrogenation of n-octane. Wet impregnation was used firstly to synthesize catalysts with larger clusters of manganese oxide on the surface of the SBA-15 support. In addition, deposition precipitation was used to prepare c...
Article
Full-text available
Copper oxide supported on alumina and copper chromite were synthesized, characterized, and subsequently tested for their catalytic activity toward the hydrogenation of octanal. Thereafter, the impact of water addition on the conversion and selectivity of the catalysts were investigated. The fresh catalysts were characterized using X-ray diffraction...
Article
Chromium molybdate catalysts with varying Cr/Mo ratios were synthesized by co-precipitation. The catalysts were characterized using XRD, Raman spectroscopy, TPR, BET surface area measurements, ICP-OES and HRTEM. X-ray diffraction and Raman studies revealed that the dominant phase in the catalysts was Cr2(MoO4)3. Furthermore, Raman spectroscopy show...
Article
The deactivation of a 15 wt.% Ni supported on SiO2 (15 NiSi) catalyst by triphenylphosphine during the hydrogenation of octanal to octanol, and subsequent regeneration, was studied. Characterization of the catalyst by hydrogen chemisorption, TPR, powder XRD, ICP-OES, BET surface area analysis, and TEM showed the presence of large nickel clusters wi...
Article
Full-text available
A highly efficient and simple reaction under exceptionally mild conditions is shown for the synthesis of biologically and pharma-ceutically active molecules of homopropargyl alcohol using HZSM-5 as the catalyst. Products analyzed by IR, 1H NMR, 13C NMR and GC-MS showed consistent yields of 98 % of the alcohol, even with respective recycles of the r...
Article
Monometallic (10 wt.%) Co, Ni and Cu nanoparticles supported on alumina catalysts were prepared using an ultrasonic impregnation-cavitation method and characterized using ICP, XRD, physisorption, chemisorption and temperature programmed techniques. The copper catalyst showed higher metal dispersion and greater hydrogen and CO chemisorption capacity...
Article
The effectiveness of different experiments for the regeneration of a phosphorus poisoned 15 wt.% Ni/Al2O3 catalyst was investigated during the time on stream hydrogenation of octanal to octanol. The catalyst was deactivated after being exposed to feed contaminated with 500 ppm of triphenylphosphine. Regeneration of the catalyst was attempted by eit...
Article
Full-text available
A green and eco-friendly route for the almost quantitative BOC protection of a large variety of aliphatic and aromatic amines, amino acids, and amino alcohols is reported in catalyst and solvent-free media under mild reaction conditions. The products were confirmed by ¹H, ¹³C NMR, IR spectroscopy, and in some cases, elemental analysis. This protoco...
Article
Full-text available
Four catalysts with the molar ratio of Ni:Al (1:2) were prepared by solution combustion synthesis (SCS) and sol–gel auto combustion synthesis (SGCS) techniques. Two fuels [urea and oxalyldihydrazide (ODH)] with distinct oxygen/carbon (O/C) ratios and chelating capability were chosen for investigating the effect of the fuel on the syntheses of these...
Article
Full-text available
Ni supported on Montmorillonite was tested for the hydrogenation of octanal to octanol. Different loadings of Ni were tested including 10, 15 and 20 wt% across a temperature range from 110 to 180 °C. For the lower loading of Ni, that is 10 wt %, selectivity toward the alcohol was reduced due to the formation of C24 acetal and octyl ether. This poor...
Article
Full-text available
This study examines the effect of different weight loadings of molybdenum as molybdenum oxide, supported on SBA-15 for the oxidative dehydrogenation of n-octane. The loadings of molybdenum on SBA-15 were performed by wet impregnation method the resultant catalysts were characterised by ICP-OES, BET physisorption studies, PXRD, Raman spectroscopy, T...
Article
Full-text available
In an endeavour to understand the hydrogenolysis pathway of glycerol to lower alcohols over Ni on Al2O3 and SiO2 catalysts, the role of the intermediates (1,2-propanediol (1,2-PDO), 1,3-propanediol (1,3-PDO), ethylene glycol (EG) and ethanol) was investigated. Under the reaction conditions employed in this study, it was clear that the hydrogenolysi...
Article
Full-text available
The activity of Ni-supported catalysts on silica and alumina was studied for the transformation of glycerol to lower alcohols, primarily 1-propanol and ethanol. Pressure had a small effect on glycerol conversion whereas temperature had a significant effect on conversion and selectivity. Ni/SiO2 gave quantitative conversion of glycerol at a lower te...
Article
Full-text available
AbstractThe evaluation of supported precious metal catalysts, in combination with and without solid acids, for the hydrogenolysis of highly concentrated glycerol solutions, with the aim to produce lower alcohols, in particular 1-propanol was studied. GCMS analysis of the product mixtures obtained has shed some light on the possible mechanism leadin...
Article
A number of hydrotalcite-like compounds containing Mg and V were prepared with different Mg/V ratios, ranging from 1:1 to 4:1. The effect of variations in synthesis procedures, such as preparing the compounds under inert gas, hydrothermal treatments at different temperatures and different precipitating agents were examined. These compounds were cha...
Article
Two new phenolics, named typhaphthalide (a benzylphthalide) and typharin (an isocoumarin) plus sitosterol were isolated and identified from the hexane extract of the rhizomes of Typha capensis. The acetone extract yielded afzelechin, epiafzelechin, and catechin.

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Projects (2)
Project
Transform CO2 to value added products useful for society. Generate new materials to achieve this goal. Start new collaborations.