活性炭担载金属氧化物用于热煤气脱硫

以热煤气脱硫并回收单质硫为目的,考察了活性炭担载金属氧化物(M/AC)在中温范围150—250℃内,催化氧化硫化氢生成单质硫的研究。担载量1%(质量分数)的M/AC通过等体积浸渍法制得,在固定床上评价了其脱硫活性,并考察了温度、反应气氛等工艺条件对脱硫效果的影响。M/AC脱硫的活性顺序为:Mn/ACCu/ACCe/ACFe/ACCo/ACV/AC。通过DTG分析,硫化氢选择性氧化的主要产物是单质硫。M/AC上金属氧化物起主要的催化作用,催化硫化氢和氧气反应生成单质硫,生成的单质硫被吸附在活性炭的孔道中。

Activated carbon-supported metal oxides for hot gas desulfurization

The catalytic oxidation of hydrogen sulfide(H2S) to element sulfur on activated carbon-supported metal oxide sorbents(M/AC) for hot gas desulfurization was studied at 150-250 ℃.Various M/AC sorbents loaded with 1%(mass fraction) metal oxide were separately prepared by pore volume impregnation.The test was performed in a vertical fixed-bed reactor,and the effects of temperature and gas composition were examined.The M/AC can be placed in the following order with respect to activity: Mn/AC>Cu/AC>Ce/AC>Fe/AC>Co/AC>V/AC.The DTG analysis evidences that the main product of the catalytic oxidation of hydrogen sulfide is elemental sulfur.The metal oxides loaded on the M/AC surface catalyze the reaction between hydrogen sulfide and oxygen to form element sulfur,and improve the efficiency and selectivity for removal of hydrogen sulfide.The element sulfur is stored in the pore passage of the activated carbon.