Microwave heating behaviors and drying characteristics of mercury catalyst

Abstract The conventional drying process of mercury catalyst has disadvantages such as low efficiency and poor quality, so the microwave drying method of mercury catalyst is proposed. The dielectric properties of the main components activated carbon, mercury chloride and mercurous chloride were compared. The results show that microwave heating of mercury catalyst is a selective heating process, moisture and activated carbon can selectively absorb microwave, but the microwave absorption abilities of mercury chloride, mercurous chloride are poor, which can effectively avoid heat volatilization. The microwave multi-stage constant temperature drying process was compared. The results show that the drying times of two-stage drying method (80 and 120 ℃) and three-stage drying method (80, 100 and 120 ℃) are 74 min, while that of two-stage drying method (100 and 120 ℃) is only 50 min, which can save 77.3% drying time. Compared with conventional drying, the maximum drying rate and average drying rate of microwave drying were 7 times and 4 times respectively. The higher the moisture content, the more obvious the advantage of microwave drying. Microwave drying of mercury catalyst has the advantages of high efficiency and good quality.

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	LIU Chao
	LUO Wei
	WANG Zixiao
	ZHANG Libo
	ZHNAG Bin

Keywords： microwave dielectric property mercury catalyst drying selective heating

Received 2023-03-29;

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LIU Chao, LUO Wei, WANG Zixiao, ZHANG Libo, ZHNAG Bin.Microwave heating behaviors and drying characteristics of mercury catalyst[J] Chemcial Industry and Engineering, 2025,V42(2): 107-115

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