Microwave field: High temperature dielectric properties and heating characteristics of waste hydrodesulfurization catalysts

Xiaolei Ye; Shenghui Guo; Wenwen Qu; Li Yang; Tu Hu; Shengming Xu; Libo Zhang; Bingguo Liu; Zimu Zhang

doi:10.1016/j.jhazmat.2018.12.024

Microwave field: High temperature dielectric properties and heating characteristics of waste hydrodesulfurization catalysts

J Hazard Mater. 2019 Mar 15:366:432-438. doi: 10.1016/j.jhazmat.2018.12.024. Epub 2018 Dec 10.

Authors

Xiaolei Ye¹, Shenghui Guo², Wenwen Qu³, Li Yang², Tu Hu⁴, Shengming Xu⁵, Libo Zhang⁶, Bingguo Liu², Zimu Zhang⁷

Affiliations

¹ Key Laboratory of Unconventional Metallurgy, Kunming University of Science and Technology, Kunming, 650093, Yunnan, China; National Local Joint Laboratory of Engineering Application of Microwave Energy and Equipment Technology, Kunming University of Science and Technology, Kunming, 650093, Yunnan, China; Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, 650093, Yunnan, China; Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, Yunnan, China.
² Key Laboratory of Unconventional Metallurgy, Kunming University of Science and Technology, Kunming, 650093, Yunnan, China; National Local Joint Laboratory of Engineering Application of Microwave Energy and Equipment Technology, Kunming University of Science and Technology, Kunming, 650093, Yunnan, China; Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, Yunnan, China.
³ Key Laboratory of Unconventional Metallurgy, Kunming University of Science and Technology, Kunming, 650093, Yunnan, China; National Local Joint Laboratory of Engineering Application of Microwave Energy and Equipment Technology, Kunming University of Science and Technology, Kunming, 650093, Yunnan, China; Faculty of Science, Kunming University of Science and Technology, Kunming, Yunnan, 650500, China.
⁴ Key Laboratory of Unconventional Metallurgy, Kunming University of Science and Technology, Kunming, 650093, Yunnan, China; National Local Joint Laboratory of Engineering Application of Microwave Energy and Equipment Technology, Kunming University of Science and Technology, Kunming, 650093, Yunnan, China; Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, Yunnan, China. Electronic address: hutu1219@126.com.
⁵ Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, China.
⁶ Key Laboratory of Unconventional Metallurgy, Kunming University of Science and Technology, Kunming, 650093, Yunnan, China; National Local Joint Laboratory of Engineering Application of Microwave Energy and Equipment Technology, Kunming University of Science and Technology, Kunming, 650093, Yunnan, China; Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, Yunnan, China. Electronic address: libozhang77@163.com.
⁷ Key Laboratory for Ecological Metallurgy of Multimetallic Mineral, Ministry of Education, Northeastern University, Shenyang, 110819, China.

PMID: 30554089
DOI: 10.1016/j.jhazmat.2018.12.024

Abstract

The exploration of the dielectric properties of waste hydrodesulfurization catalysts has important guiding significance for the development of microwave heat treatment of waste hydrodesulfurization catalysts for the recovery of valuable metals. The resonant cavity perturbation technique was used to measure the dielectric properties of waste catalyst and the mixture of waste catalyst and Na₂CO₃ during roasting from room temperature to 700 °C at 2450 MHz. The heating properties of the waste catalyst and mixture of waste catalyst and Na₂CO₃ were determined in the microwave field. The results show that the waste catalyst and the mixture of waste catalyst and Na₂CO₃ exhibit strong microwave response capability, and the dielectric constant, dielectric loss factor, and dielectric loss tangent increase with increasing temperature; from 20 to 300 °C, the waste catalyst and the mixture of waste catalyst and Na₂CO₃ heated at a slower rate, while the material heated rapidly from 300 to 700 °C. In addition, the mechanism of microwave action has been proposed based on the study of dielectric properties and heating properties in the microwave field.

Keywords: Dielectric properties; Heating properties; Microwave heating; Waste hydrodesulfurization catalysts.