文献类型：期刊文献

英文题名：Reactive adsorption desulfurization of NiO and Ni0 over NiO/ZnO-Al2O3-SiO2 adsorbents: role of hydrogen pretreatment

作者：Ju, Feng[1]; Wang, Miao[1]; Luan, Hui[1,2]; Du, Pengyu[3]; Tang, Zhihe[2]; Ling, Hao[1]

机构：[1] State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China; [2] Research Institute of Safty and Environment Technology, China National Petroleum Corporation, Beijing, 102206, China; [3] Petrochina Karamay Petrochemical Co. Ltd., Karamay, Xinjiang, 834000, China

年份：2018

卷号：8

期号：58

起止页码：33354

外文期刊名：RSC Advances

收录：EI(收录号：20184205941516)

语种：英文

外文关键词：High resolution transmission electron microscopy - Silica - Desulfurization - X ray photoelectron spectroscopy - Magnesium compounds - X ray diffraction - Zinc compounds - Aluminum compounds - Fluidization - Hydrogen

摘要：Reactive adsorption desulfurization (RADS) of Fluidized Catalytically Cracked (FCC) gasoline on reduced and unreduced NiO/ZnO-Al2O3-SiO2 adsorbents was studied. Various characterizations such as powder X-ray diffraction (XRD), H2-temperature-programmed reduction (H2-TPR), the H2/O2 pulse titration (HOPT), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) are used to evaluate the effects of hydrogen pretreatment of the adsorbents. XRD and HOPT results indicate that NiO is hard to be reduced to Ni0 under the conditions of RADS. H2-TPR shows that NiO might be reduced to Ni0 at the temperature of 598 °C, much higher than the temperature of RADS. The Ni 2p3/2 spectrum of Ni0 is not observed for the reduced adsorbent, but the main peak of Ni 2p3/2 of NiS is found for the spent adsorbent. The unreduced NiO/ZnO-Al2O3-SiO2 adsorbent performs a better desulfurization than the reduced adsorbent at the beginning of desulfurization process. NiO and Ni0 are assumed as the main active components and present a good desulfurization ability in RADS. Finally, a change in the RADS mechanism is presented and discussed. ? The Royal Society of Chemistry.