Hydrogen production via CO2 reforming of methane over ZrO2-Doped Ni/ZSM-5 nanostructured catalyst prepared by ultrasound assisted sequential impregnation method

The potential use of HNO 3 -treated clinoptilolite in the preparation of Pt/CeO 2 -Clinoptilolite nanostructured catalyst used in toluene abatement from waste gas stream at low temperature

“…This observation seems to be due to high dispersion of Pt and covering the support surface. A similar trend was observed in our previous investigations on zeolite based catalysts (Asgari et al, 2013a,b;Jamalzadeh et al, 2013;Rahmani et al, 2014b). In contrast, utilizing ultrasonic irradiation on depositing Pt on support is an important factor that effects The potential use of HNO 3 -treated clinoptilolite dispersion of active phase.…”

“…Natural zeolites (i.e. clinoptilolite) have indicated good potential for waste water treatment (Herney-Ramirez et al, 2010), gas separation (Rahmani et al, 2014b), gas drying (Jenkins et al, 2002;Li et al, 2013b) and other catalytic reactions (Baroi and Dalai, 2014;Li et al, 2014;Otomo et al, 2014). Because of high density of active acid sites, high thermal and mechanical stability and porous structure, zeolite based catalysts are desired for VOC abatement (Dammak et al, 2013;Jansson et al, in press (in press, available online 24 October 2014); Lo´pez-Fonseca et al, 2003;Rahmani et al, 2014a).…”

Dry reforming of methane over nanostructured Co/Y catalyst for hydrogen production: Effect of ultrasound irradiation and Co-loading on catalyst properties and performance

“…The reactor effluent line was connected to a GC gas-sampling valve to analyze the products. Prior the reaction, the nanocatalysts was reduced under a stream of H 2 (99.999%-Technical Gas Service) at 700°C for 3 h. The reduction temperature selected based on the last studies [2,4,11,15,26,36,59]. The feed and products composition were analyzed using a gas chromatograph (GC Chrom, Teif Gostar Faraz, Iran) equipped with a flame ionization detector (FID) and a thermal conductivity detector (TCD) as well as Agilent molecular sieve and Plot-U columns.…”

Catalytic wet air oxidation of phenol over ultrasound-assisted synthesized Ni/CeO2–ZrO2 nanocatalyst used in wastewater treatment

“…According to the direct effect of the synthesis method on the stability and activity of the catalysts, the sonochemistry method is proposed as a suitable method for settling of metallic nanoparticles on the different supports without damaging to their structure (Khoshbin and Haghighi, 2014;Rahmani et al, 2014b;Sharifi et al, 2014). Ultrasound can enhance and promote dispersion of the active metal on the carrier, thus improving the catalytic performance of the catalyst (Estifaee et al, 2014;Liu et al, 2010;Rahmani et al, 2014a).…”