S⁃Zorb reaction adsorption desulfurization technology has become one of the important gasoline deep desulfurization technologies because of its high efficiency desulfurization effect and mild process conditions. S⁃Zorb desulfurization technology was developed by Phillips company and has been widely promoted in China since it was exclusively acquired by Sinopec. However, the composition of its adsorbent has not been fully published. Therefore,the focus of the S⁃Zorb process research is on the localization of the adsorbent at present, and the activity and stability of the desulfurizer are continuously improved through in⁃depth research on the reaction adsorption mechanism. The process development and existing problems of S⁃Zorb reaction adsorption desulfurization technology and the latest progress of research and development of S⁃Zorb reaction adsorption desulfurization agent were reviewed, and the mechanism of reaction adsorption desulfurization was discussed.

Nanocrystalline ZSM⁃5 zeolites were synthesized by hydrothermal synthesis using 30% silica sol as silica source and aluminium sulfate as aluminium source. The obtained samples were characterized by XRD, SEM, BET and NH3⁃TPD characterization methods, and the effects of different pH on the physico⁃chemical properties of nanocrystalline accumulation ZSM⁃5 molecular sieve were investigated. The results showed that when the pH value was 11.50, the catalyst had nano⁃scale structure, large surface area, large number of mesopores and suitable acidity. The application of thiophene alkylation showed better thiophene alkylation activity.

The isomerization of nhexane over Mo ₂C /Mo O ₂ - Z r O ₂ catalyst was investigated. First, the precursor solid superacid Mo O ₃ - Z r O ₂ was prepared by coprecipitation process, using the mixture of cetyltrimethylammonium bromide and polyethylene glycol 20000 as templates. It can be seen that the precursor samples had applicable surface area, pore diameter and volume from the BET and FTIR characterization of the Mo ₂C/MoO ₂ZrO ₂.The total acid of precursor Mo O ₃ - Z r O ₂had a large decline after carbonized. The conversion and selectivity of Mo ₂C/MZP0.005C0.5 are much more than single auxiliary catalystafter adding catalyst mixed assistant. The conversion rate and selectivity reached 67.5%, 75.2%, respectively.