汞触媒的微波加热行为及干燥特性

摘要汞触媒的常规干燥工艺存在效率低和品质差等缺点,为此提出微波干燥汞触媒的方法。对比分析了汞触媒中主要成分载体活性炭、氯化汞、氯化亚汞的介电特性,结果表明,汞触媒的微波加热是选择性加热过程,水分和活性炭可选择性吸收微波,而氯化汞、氯化亚汞吸波能力差,可有效避免其热挥发。对比研究了微波多段式恒温干燥工艺,结果表明,采用两段式(80和120 ℃)及三段式干燥法(80、100和120 ℃)的干燥时间为74 min,而两段式(100和120 ℃)干燥法的干燥时间仅为50 min,可节省77.3%的干燥时间。与常规干燥相比,微波最大干燥速率是其7倍,平均干燥速率是其4倍,在水分含量越高时,微波干燥优势越明显。汞触媒的微波干燥具有效率高和品质好的优点。

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	刘超
	罗为
	王梓霄
	张利波
	张彬

关键词：微波介电特性汞触媒干燥选择性加热

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.

Keywords： microwave dielectric property mercury catalyst drying selective heating

Received 2023-03-29;

Fund:国家自然科学基金项目(52104393);国家自然科学基金项目(51522405)。

Corresponding Authors: 张利波,教授,zhanglibopaper@126.com。 Email: zhanglibopaper@126.com

About author: 刘超(1989—),男,博士,讲师,研究方向为微波能技术新应用等。

引用本文:

刘超, 罗为, 王梓霄, 张利波, 张彬.汞触媒的微波加热行为及干燥特性[J]. 化学工业与工程, 2025,42(2): 107-115

LIU Chao, LUO Wei, WANG Zixiao, ZHANG Libo, ZHNAG Bin.Microwave heating behaviors and drying characteristics of mercury catalyst[J]. Chemcial Industry and Engineering, 2025,42(2): 107-115

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