Adsorption of Thiophene From Fuel on Modified Nay Zeolite

Both the poor adsorption capacity and low selectivity to sulfur compounds restrict some usage in the fields of adsorption desulphurization. adsorption of thiophene from fuel on nay zeolite modified with different concentration of naoh aqueous solutions and hcl aqueous solution was investigated. mesoporosity was introduced to access active cites and enhance the zeolite properties and adsorption capacity. the obtained samples were characterized by x-ray diffraction (xrd), n2 adsorption – desorption (bet), and scanning electron microscope (sem). the results showed that the mesopore surface area up to 48.89 m2/g was obtained for meso-y when the parent zeolite nay was subjected to desilication by naoh. on the other hand, when the parent zeolite nay was subjected to sequential treatment by hydrochloric acid and naoh as dealumination and desilication respectively, the mesoporosity reduced and the intrinsic crystallinity destroyed completely. the adsorption desulfurization results showed that hierarchically structured (meso-y) exhibited much higher desulphurization performance than microporous nay zeolite. the order of increasing the adsorption capacity is as follows: nay-0.2 > nay-0.4 > parent zeolite nay > da – 0.25. ds – 0.4. this result proves that creating mesoporosity by da – 0.25. ds – 0.4 reduces the adsorption capacity.