文献类型：期刊文献

英文题名：The Role of NiO in Reactive Adsorption Desulfurization Over NiO/ZnO-Al2O3-SiO2 Adsorbent

作者：Ju, Feng[1];Wang, Miao[1];Wu, Tian[1];Ling, Hao[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2019

卷号：9

期号：1

外文期刊名：CATALYSTS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000459732000078)】；

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

语种：英文

外文关键词：reactive adsorption desulfurization; NiO; metallic Ni; NiO/ZnO-Al2O3-SiO2 adsorbent

摘要：The reactive adsorption desulfurization (RADS) of a model gasoline n-hexane containing thiophene was carried out with a NiO/ZnO-Al2O3-SiO2 adsorbent in N-2 and H-2, respectively. A declining RADS trend has been observed in N-2, without the presence of H-2, indicating that NiO is sulfurized and exhibits activity for RADS. TPR and XPS results presented NiO in the adsorbent is hard to be reduced because of the powerful interaction between NiO and the support. The sulfurization of NiO into NiSx is a primary condition for the RADS process, the same as the presulfurization of hydrotreating catalyst, while metallic Ni is an intermediate reduction product of NiSx. Results of a low RADS temperature at 300 degrees C, much lower than the reduction temperature of NiO, suggest that NiO plays an important role. Based on assumption of NiO as the main active component, the RADS could reduce the reaction temperature and energy consumption significantly. The participation of hydrogen and n-hexane in pretreatment conducted at 420 degrees C contributes to the activation of adsorbent. Also, these methods of pretreatment improved the desulfurization performance under the reaction temperature of 300 degrees C.