The oxidative coupling of methane (OCM) performance over Na-W-Mn/SiO2 at elevated pressures has been simulated by adaptive neuro fuzzy inference system (ANFIS) using reaction data gathered in an isothermal fixed bed microreactor. In the designed neuro fuzzy models, three important parameters such as methane to oxygen ratio, gas hourly space velocity (GHSV), and reaction temperature were conside...

The reaction kinetics of CO2 methanation over a highly active 8.5% Ni/CeO2 catalyst was determined in fixed-bed reactor, the absence heat- and mass-transfer limitations. Once activity stabilized, more than 120 kinetic experiments (with varying values temperature, total pressure, space velocity (GHSV), partial pressure products reactants) were performed. From initial rates, an apparent activatio...

Methane dehydroaromatization reaction at 700 °C over Mo/ZSM-5 involves numerous modifications of the molybdenum species from catalyst preparation and throughout lifetime, composed 4 successive steps: calcination, activation, induction, deactivation. A thorough kinetic study was undertaken with aim to understand transformation phenomena occurring on during each stage reaction, using methane gas ...

Cu/SiO 2 catalysts prepared by a deposition-decomposition (DD) method using ammonium hydroxide are currently among the most promising for oxalates hydrogenation to ethylene glycol (EG). Here, catalyst DD was pre-reduced at a) 200–350 °C in 100% H , and 2) 200 50% /N mixture. Then, it tested °C, 25 barg, while EG yields were optimized, with -GHSV /DMO ratios ranges 1000–4000 h −1 30–200 mol/mol....

This study investigates the use of activated carbon for the odorant removal from natural gas to be used for synthesis gas production for fuel cells. The odorants used in this study were dimethyl sulfide, tetrahydrothiophene, methyl mercaptan, and t-butyl mercaptan. It was concluded that only physical adsorption is contributing towards removal of sulfur species at lower temperatures, whereas the...

This study examines the kinetics of selective catalytic oxidation of ammonia to nitrogen over a bimetallic copper-cerium nanoparticle catalyst in a tubular fixed-bed reactor. Transmission electron microscopy results showed that the catalyst containing copper and cerium is well dispersed and presents in the form of nano-sized particles. The formation of CuO/CeO2 active sites was confirmed by Fou...

The nanorod morphology of the CeO2 support has been recognized as more beneficial than other morphologies for catalytic activity in dry reforming methane. Ni/nanorod-CeO2 catalysts with different Ni contents were prepared by one-pot hydrothermal synthesis. Samples characterized X-ray diffraction (XRD), H2-temperature-programmed reduction (H2-TPR), desorption (H2-TPD), field emission scanning el...

Catalysts with a Zn/H+ molar ratio ranging from 0 (H-ZSM5) to 1.8 (Zn/H-ZSM5), were prepared by wet impregnation three commercial zeolites Si/Al of 15, 40 and 75. The texture, acidity reactivity the bifunctional catalysts characterized by: N2, IR followed adsorption pyridine NH3-TPD, tested at 500 °C low partial pressure ethylene (PC2H4 = 0.005 MPa) high GHSV (ca 13,300 h−1). intrinsic activity...

Cobalt oxide catalysts supported on oxidized multi-walled carbon nanotubes (MWCNT) for the low-temperature catalytic oxidation of carbon monoxide were prepared by an impregnation-ultrasound method. These catalysts were characterized by N2 adsorption/desorption, TEM, XRD, Raman, and H2-TPR methods. The XRD and Raman results indicated that the phase of the synthesized cobalt...