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摘要: 考察了低温下一步催化脱除二硫化碳的可行性，通过无氧,有氧试验设计, 对反应产物进行分析,推断出一步催化脱除二硫化碳的宏观反应历程。同时分析了温度、空速、硫密度、相对湿度、氧硫比等不同因素对催化脱除二硫化碳的影响。试验结果表明，催化水解－氧化耦合一步法脱除二硫化碳的反应，在130 ℃，相对湿度1.5％，氧硫比2 600 h－1下该催化剂工作硫容可达到2.64 mg/g。通过测定反应前后催化剂碱性的变化和反应后硫酸根离子的质量分数。认为催化剂的硫酸盐化是造成催化剂失活的主要原因。Abstract: A novel desulfurizing agent (DA) was developed to remove carbon disulfide in one step at relatively low temperature. Catalytic hydrolysis and catalytic oxidation were combined on this desulfurizing process. The mechanism to remove carbon disulfide in one step was confirmed by the experiment. The effects of temperature, space velocity, CS-2 concentration, relative humidity, the ratio of O/S were also investigated. From the experimental result, a high sulfur capacity of 2.64 mg/m3 was obtained at the condition of 130 ℃, 1% of relative humidity, 2 of the O/S ratio, 600 h－1 of space velocity. The chemical analysis of basic and sulfuric acid on the catalysts showed different tendency on the catalysts. The decrease of OH－1 was attributed to the formation of SO42－. High ratio of SO42－ to total S-yield had negative effect on the sulfur capacity.
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Key words:
- removal of carbon disulfide /
- hydrolysis catalyst /
- low temperature
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