摘要
采用共沉淀法制备了脱硫用铁基吸附剂的主要活性组分Fe2O3,并对其进行还原处理,制备了不同价态的含铁组分Fe3O4和Fe。使用固定床反应装置分别考察了三者在400～500℃范围内、COS/N2和H2/COS/N2两种气氛下对COS的吸附和催化转化的行为。结果表明:在COS/N2气氛下,三者对COS均有吸附,其吸附能力随温度的变化而异,不同温度下三者对COS吸附的硫容顺序为:Fe2O3>Fe3O4>Fe(400℃和450℃);Fe3O4>Fe2O3>Fe(500℃)。在H2/COS/N2/气氛下,COS的氢解反应随着温度的升高而增强,各活性组分的硫化产物对COS的氢解反应都具有一定的催化作用,这对于抑制H2S向COS转化具有积极的作用。
The iron-based active component,Fe2O3,was prepared by co-precipitation method.Fe3O4 and Fe,were also prepared by reducing Fe2O3 at different temperature for different time.The adsorption behavior of them was investigated in COS/N2 and H2/COS/N2 gas streams using the fixed bed reactor at 400 ℃,450 ℃ and 500 ℃,respectively.The results show that all three active components can adsorb COS and their adsorption ability varies with temperature.At 500 ℃,the sulfur capacity of Fe3O4 is the highest,and that of Fe is the lowest.While at the temperatures of 450 ℃ and 400 ℃,the sulfur capacity has the following sequence：Fe2O3 Fe3O4 Fe.In H2/COS/N2 gas stream,the reaction of COS hydrogenolysis is enhanced by increasing temperature.The iron sulfides have certain catalysis on COS hydrogenolysis and it has an active influence on inhibition of conversion from H2S to COS.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2011年第10期2147-2150,2172,共5页
Chemical Industry and Engineering Progress
基金
太原市科技局大学生创新创业专项(100115102)
太原理工大学引进人才项目(tyut-rc201008a)
山西省科技基础条件平台建设项目(2010091015)
关键词
铁基活性组分
硫氧化碳
吸附
中高温煤气脱硫
iron-based active component
COS
adsorption
hot coal gas desulfurization
