Category Archives: 1996-2010

Abstract: This paper deals with thermodynamic chemical equilibrium analysis using the method of direct minimization of Gibbs free energy for all possible CH4 and CO2 reactions. The effects of CO2/CH4 feed ratio, reaction temperature, and system pressure on equilibrium composition, … Continue reading →

Abstract: The catalytic activity of a series of CeO2-ZrO2 mixed oxides in the selective catalytic reduction (SCR) of NO by C3H6 at 400 °C has been investigated. The NO reduction activity of pure CeO2 is enhanced in the presence of Zr, reaching a maximum … Continue reading →

Abstract: The catalytic conversion of a methane and ethylene mixture to gasoline range hydrocarbons has been studied over W/HZSM-5 catalyst. The effect of process variables, such as temperature, percentage of volume of ethylene in the methane stream and catalyst loading … Continue reading →

Abstract: The screening of a series of W-based catalysts on different supports i.e. HZSM-5, Hβ, USY and Al2O3 for the dehydroaromatization of methane (DHAM) revealed that HZSM-5 emerged as the best support. Next, the performance of W/HZSM-5 and W-H2SO4/HZSM-5 catalysts for … Continue reading →

Abstract: A new hybrid numerical approach, using Weighted Sum of Squared Objective Functions (WSSOF) algorithm, was developed for multi-responses optimization of carbon dioxide oxidative coupling of methane (CO2 OCM). The optimization was aimed to obtain optimal process parameters and catalyst compositions … Continue reading →

Abstract: The dehydroaromatization of CH4 over W-supported ZSM-5 with varying degrees of Li+ ion-exchanged catalysts was studied with and without oxygen at 1073 K and 1 atm. The activity and stability of the catalysts for the conversion of CH4 to aromatics over W … Continue reading →

Abstract: The catalyst screening tests for CO2 oxidative coupling of methane (CO2-OCM) were studied over ternary and binary metal oxide catalysts. The catalysts were prepared by doping MgO- and CeO2-based solids with oxides from alkali (Li2O), alkaline earth (CaO), and transition … Continue reading →

Abstract: The influence of cocations (Cr and Ag) on the activity of Cu/CeO2 catalysts in the selective reduction of NOx with C3H6 has been investigated in this study. The reduction of NOx under lean conditions was greatly improved by loading Cr and Ag onto … Continue reading →

Abstract: The optimization of methane conversion to liquid fuels over copper loaded W/ZSM-5 catalyst was studied by utilizing experimental design from ‘Statsoft Statistica’ version 6.0 software. Response surface methodology was employed to determine the optimum methane conversion and C5+ selectivity. Numerical … Continue reading →

Abstract: The Cu/CeO2 and Cu/Cr/CeO2 catalysts synthesized using the impregnation method were employed to investigate the selective reduction of NOx with C3H6 at 673.15 K and 1 atm. The activity of CeO2 was greatly induced by loading 4 wt.% of … Continue reading →