Papers by Aqeel Ahmad Taimoor
Journal of the Pakistan Institute of Chemical Engineers, Jul 22, 2014
Bookmarks Related papers MentionsView impact
Recent Patents on Nanotechnology, 2009
Carbon nanotubes (CNTs) since their discovery have been the focus of research on account of excep... more Carbon nanotubes (CNTs) since their discovery have been the focus of research on account of exceptional chemical, mechanical and electrical properties. However, manipulation and processing of CNTs have been limited by their compatibility with other materials. Considerable efforts have therefore been devoted to the surface modification of CNTs to pave the way to many useful applications and to realize the potential applications in successful products, especially composite manufacturing. The chemical modification, dispersion and solubilization of CNTs represent an emerging area in the research on nanotubes-based materials. Several research groups have reported successful and doable functionalization techniques for single-walled (SWCNT) and multi-wall (MWCNT) carbon nanotubes. This paper presents an overview of the functionalization of the carbon nanotubes covering both covalent and non-covalent techniques at tips and walls of SWCNTs and MWCNTs, and summarizes recent patents possessing significant commercial value and large-scale practicality. The principal aim is to review main approaches to chemical functionalization of CNTs and to account for the advances that have been made so far.
Bookmarks Related papers MentionsView impact
Materials Research Bulletin, 2016
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Catalysis Science & Technology, 2012
ABSTRACT Acetic acid, a common biomass transformation residue, can be converted into acetone by d... more ABSTRACT Acetic acid, a common biomass transformation residue, can be converted into acetone by direct ketonization in the gas phase over γ-Fe2O3 (maghemite) pre-activated at 450 °C under air. This reaction was performed in a continuous flow reactor with varying temperature from 250 to 300 °C and different carrier gases. Using N2 as carrier gas, the activity of the iron based catalyst normally increased with increasing temperature and contact time and remained constant under stationary operating conditions. A slight decrease of activity was observed using a N2/CO2 mixture as carrier gas. A strong enhancement of the activity was observed when H2 was introduced in the carrier gas, as a N2/H2 or CO2/H2 mixture. This improvement could be attributed to the modification of the oxidation state of the ironcatalyst used for which in situ characterisation is still to be performed.
Bookmarks Related papers MentionsView impact
Reaction Kinetics, Mechanisms and Catalysis, 2011
Abstract Gas phase toluene hydrogenation is investigated over Pt/Al2O3 catalyst with temperature ... more Abstract Gas phase toluene hydrogenation is investigated over Pt/Al2O3 catalyst with temperature ranging from 75 to 125 °C and at atmospheric pressure. Strong activity variations are observed during long duration experiments. These variations are thoroughly investigated and a ...
Bookmarks Related papers MentionsView impact
Journal of Catalysis, 2011
H2/CO2 mixtures derived from biomass degradation may be regarded as a renewable source of hydroge... more H2/CO2 mixtures derived from biomass degradation may be regarded as a renewable source of hydrogen that could be used for hydrogenation reactions. The practicality of directly using a CO2-containing H2 feed was evaluated during the hydrogenation of ...
Bookmarks Related papers MentionsView impact
ABSTRACT Cation exchanger (steel vessel), containing polymeric beads as exchange resin, in a proc... more ABSTRACT Cation exchanger (steel vessel), containing polymeric beads as exchange resin, in a process industry is found to be affected from localized “pitting” corrosion during the turnaround. There are two main cycles of such exchanger’s operation, i.e., normal and regeneration cycles, differentiated by passing canal/well water and sulfuric acid solution, respectively. Corrosion rates by Tafel techniques are measured for both these cycles. The different corrosion rates for canal and well water are explained as per reduction reaction equilibrium. During regeneration cycle, certain other tests like cyclic polarization and potentiostatic polarization are also conducted to understand the cause of the localized corrosion. Potentiostatic tests' observations revealed an interesting phenomenon probably explaining the failure not elucidated by the conventional corrosion measurement techniques.
Bookmarks Related papers MentionsView impact
This work deals with antimony-impregnated activated carbon electrode for the detection of heavy m... more This work deals with antimony-impregnated activated carbon electrode for the detection of heavy metal ions. Activated carbon is employed to enhance the surface area of the working electrode. Square-wave Anodic Stripping Voltammetry is performed to analyze the electrolytic solution. The peak currents for cadmium and lead are 29.2 and 49.4μA respectively, in 100 μg/L of cadmium and lead solution, which are considerably higher when equated with the previous reported values. Results also indicate that antimony-impregnated activated carbon is better when compared with the ratio of antimony amount to minimum detection limit.
Bookmarks Related papers MentionsView impact
Uploads
Papers by Aqeel Ahmad Taimoor