文献类型：期刊文献

英文题名：Reactive adsorption desulfurization of NiO and Nio 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]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]China Natl Petr Corp, Res Inst Safty & Environm Technol, Beijing 102206, Peoples R China;[3]Petrochina Karamay Petrochem Co Ltd, Karamay 834000, Xinjiang, Peoples R China

年份：2018

卷号：8

期号：58

起止页码：33354

外文期刊名：RSC ADVANCES

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000448422800041)】；

基金：The support from the Fundamental Research Funds for the Central Universities of China is gratefully acknowledged.

语种：英文

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), H-2-temperature-programmed reduction (H-2-TPR), the H-2/O-2 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 Ni-o under the conditions of RADS. H-2-TPR shows that NiO might be reduced to Ni-o at the temperature of 598 degrees C, much higher than the temperature of RADS. The Ni 2p(3/2) spectrum of Ni-o is not observed for the reduced adsorbent, but the main peak of Ni 2p(3/2) 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 Ni-o 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.