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Issue 22, 2019
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Reactive adsorption desulfurization of thiophene over NiMo/ZnO, a new adsorbent with high desulfurization performance and sulfur capacity at moderate temperature

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Abstract

3Ni7Mo/ZnO adsorbent was synthesized by a two-step impregnation method for reactive adsorption desulfurization (RADS) experiments. XRD and Raman spectra revealed the formation of NiMoO4 and ZnMoO4 phases in fresh 3Ni7Mo/ZnO. Different from Ni/ZnO adsorbents, 3Ni7Mo/ZnO adsorbents showed activity recovery after a period of reaction time at 280 °C, 3 MPa H2. This is due to the formation of the Ni–Mo–S phase, which is known as a highly effective hydrodesulfurization active site. The formation of H2S on the Ni–Mo–S improved the sulfur transfer rate, leading to the recovery of RADS activity. The RADS performance of 3Ni7Mo/ZnO is closely dependent on the pre-reduction temperature. A high RADS performance and large sulfur capacity is achieved for reduction at 280 °C. The sulfur capacity of 3Ni7Mo/ZnO reduced at 280 °C is about 41% higher than that of 3Ni/ZnO, and 15% higher than that of 10Ni/ZnO. H2-TPR, XPS, TEM and XRD characterizations demonstrated that at a higher reduction temperature Ni and ZnO can promote the reduction of Mo species, generating low valence species like Mo4+ oxide, which is difficult to be sulfided to the Ni–Mo–S phase under the reaction conditions and hinders sulfur transfer from NiSx to ZnO.

Graphical abstract: Reactive adsorption desulfurization of thiophene over NiMo/ZnO, a new adsorbent with high desulfurization performance and sulfur capacity at moderate temperature

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Publication details

The article was received on 31 May 2019, accepted on 21 Aug 2019 and first published on 17 Oct 2019


Article type: Paper
DOI: 10.1039/C9CY01070J
Catal. Sci. Technol., 2019,9, 6318-6326

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    Reactive adsorption desulfurization of thiophene over NiMo/ZnO, a new adsorbent with high desulfurization performance and sulfur capacity at moderate temperature

    M. Tang, W. Wang, L. Zhou, Y. Zhang, Z. Qin, W. Han, J. Wang, H. Ge and X. Li, Catal. Sci. Technol., 2019, 9, 6318
    DOI: 10.1039/C9CY01070J

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