Improvement of adsorptive desulfurization performance of Ni/ZnO adsorbent by doping with Mn additive

doi:10.1016/S1872-2067(11)60513-5

Abstract

Abstract: The effect of Mn doping on the adsorptive desulfurization performance of 5%Ni/ZnO adsorbents was investigated in model gasoline, with thiophene as a sulfur-containing compound, using a fixed-bed reactor. The 5%Ni/MnO-ZnO adsorbents with different levels of Mn doping were prepared using an incipient wetness impregnation method and characterized by powder X-ray diffraction (XRD). It was found that the adsorption performances of the 5%Ni/MnO-ZnO adsorbents were considerably improved after Mn doping compared with that of 5%Ni/ZnO. Moreover, the 5%NiO/MnO-ZnO adsorbents showed high desulfurization activities after regeneration. Sulfur removal by a 5%NiO/8%MnO-ZnO adsorbent after three reaction-regeneration cycles was 4% higher than that by a 5%NiO/ZnO adsorbent without Mn doping. The excellent performance of the 5%NiO/8%MnO-ZnO adsorbent in desulfurization, and its regenerability, were attributed to formation of a new compound, ZnMnO₃, in the adsorbent; this compound was characterized using XRD.

Key words: Adsorptive desulfurization, Nickel, Manganese, Zinc oxide, Adsorbent, Regeneration

ZHANG Yu-Liang, YANG Yong-Xing, LIN Feng, YANG Min, LIU Tie-Feng, JIANG Zong-Xuan, LI Can. Improvement of adsorptive desulfurization performance of Ni/ZnO adsorbent by doping with Mn additive[J]. Chinese Journal of Catalysis, 2013, 34(1): 140-145.

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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(11)60513-5

https://www.cjcatal.com/EN/Y2013/V34/I1/140

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