PREPARATION OF MOLECULAR SIEVE NI-MCM-41 AND ITS ADSORPTIVE DENITROGENATION PERFORMANCE OF SIMULATED DIESEL

Abstract

Abstract: Ni-MCM-41 heteroatom molecular sieve was synthesized by hydrothermal synthesis method, using nickel nitrate as Ni source and hexadecyl trimethyl ammonium bromide as the template and characterized by IR, XRD and nitrogen adsorption. IR and XRD results indicated that Ni was entered into the framework of MCM-41. Nitrogen adsorption analysis determined that the specific surface area of Ni-MCM-41 heteroatom molecular sieve was 523 m2/g，the average pore size was 2.82 nm，and the pore volume was 0.625 8 cm3/g. The effects of Ni/SiO2 molar ratio on pyridine adsorption indicated that the Ni-MCM-41 molecular sieve with Ni/SiO2 molar ratio of 0.01 had the best nitrogen removal rate. The effects of molecular sieve dosage, adsorption temperature and adsorption time on adsorptive denitrogenation by Ni-MCM-41 (0.01) were investigated, It was recognized that the best denitrogenation conditions were as follows：molecular sieve dosage of 0.02 g per mL simulative diesel, adsorption temperature 40 ℃ and adsorption time 20 min.

Key words: Ni-MCM-41, heteroatom molecular sieve, characterization, simulated diesel, adsorptive denitrogenation

CLC Number:

References

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