Citation: ZHANG Tao-zhi, HUANG Li-chun, HU Tian-dou, SHI Rui-ping, WANG Guo-fu, ZHENG Li-rong, CHU Sheng-qi, ZHOU Ying-li, WU Min, AN Peng-fei. An AXAFS study on the mechanism of reactive adsorption desulfurization of model oil over Ni/ZnO adsorbent[J]. Journal of Fuel Chemistry and Technology, ;2014, 42(2): 246-251. shu

An AXAFS study on the mechanism of reactive adsorption desulfurization of model oil over Ni/ZnO adsorbent

1.
1. Institute of High Energy Physics, the Chinese Academy of Sciences, Beijing 100049, China;

Corresponding author: HU Tian-dou,
Received Date: 23 May 2013
Available Online: 30 July 2013
Fund Project: 国家自然科学基金(21227002) (21227002)国家重点基础研究发展规划(973计划,2010CB226900)。 (973计划,2010CB226900)

Atomic XAFS (AXAFS) originates from photoelectron scattering off electrons in bonds on the periphery of the absorber atom, the embedded-atom potential, the interstitial potential and the distribution of the absorber-atom electron density are all found to be important in determining the AXAFS intensity, hence AXAFS can be a very useful probe to monitor changes in the electronic and chemical structure of the absorber atom. In this work, we use AXAFS of Zn element to study the reaction mechanism of the calcined and the reduced adsorbent under different atmospheres, it is showed that hydrogen plays an important role in the desulfurization. In situ AXAFS of Zn element also exhibits the chemical structure evolution of Zn element during desulfurization at 350 ℃ and 3.0 MPa in the atmosphere of H₂.
- AXAFS,
- XAFS,
- Ni/ZnO adsorbent,
- reactive adsorption desulfurization,
- reaction mechanism
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