Enhanced adsorptive desulfurization performance over hierarchically structured HZSM-5 zeolite
Volume Title: 1
Chemical Engineering, Chemical Engineering, Babol Noshirvani University of Technology, Babol, Iran
Sulfur compounds combustion in transportation fuels is one of the main reasons for air pollution. Adsorptive desulfurization using zeolites as adsorbents is an effective method for sulfur removal due to economically beneficial and environment-friendly. Two essential challenges in adsorptive desulfurization are capacity and selectivity. Mesoporosity was introduced in the HZSM-5 zeolites by the desilication method to increase the zeolite adsorption capacity and provide better access to internal sites. The BET results demonstrated that high surface area up to 354.37 m2/g1 and mesostructure generated under the conditions of pure NaOH and mixture of TPAOH/NaOH, 2.5 hr, and 75 °C. According to experimental results, the sulfur adsorption capacities of samples increase in the order of Parent < ATH-0R < ATH-0.4R. The results of this study proved that mesoporosity reduces the micropore diffusion, facilitates access to internal zeolite cavities, and consequently improves the capacity for sulfur compounds.