Study on the Characterization of Zinc Ferrite High-Temperature Coal Gas Desulfurization Agent

Abstract:

Using ferric nitrate, zinc nitrate, ammonia liquor and binder as main raw materials, five kinds of zinc ferrite sorbents were prepared by the co-precipitation method. The effects of the different binders on the structure and texture of zinc ferrite sorbents were investigated. The morphology, composite structure, pore properties, and mechanical strength were studied by using modern several physicochemical techniques such as powder X-ray diffraction (XRD), scanning electronic microscopy (SEM), strength tester and gas absorption meter. It is showed that spinel structure ZnFe2O4 is not affected by different binders，and its particle diameter is in micron leve1. The spinel structures are present in the sorbents that have been calcined at 750 0C.. The sorbent employed kaolinite as binder is the best one of the five types of sorbents for desulfurization, while the one employed diatomite is the worst.Different binders modify the textural properties, modifying consequently the sorbent reactivity. Furthermore, the reactivity and sulfur capacity of sorbents are increasing with an increase in the pore volume.

• Periodical: Advanced Materials Research (Volumes 129-131)
• Pages: 1233-1237
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.129-131.1233
• Online since: August 2010
• Authors: Hong Yan Xu, Mei Sheng Liang, Chun Hu Li
• Keywords: Desulfurisation, High Temperature Coal Gas, Sorbent, Zinc Ferrite

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