活性炭催化氧化烟气中SO_(2)的性能研究

Study on catalytic oxidation of SO_(2) in flue gas by activated carbon

活性炭吸附催化氧化脱SO_(2)是烟气脱硫技术的重要发展方向。考察活性炭孔道结构、水汽含量对活性炭脱硫性能的影响。结果表明,微孔和中孔并存的活性炭孔道结构是影响脱硫效果的重要因素;烟气中水汽含量并不是越多越好,水汽含量约为体积分数8%~11%时,具有较高的脱硫效果。烟气中的氧气含量高达体积分数3%~8%,已经足够使SO_(2)转化为硫酸,不必额外补充氧气,解决了富氧条件下,SO_(2)的脱除问题。在同样的实验条件下,自制活性炭的脱硫效果和稳定性明显优于国外产品。

Active carbon adsorption catalytic oxidation is an important development direction of flue gas desulfurization technology.We studied the effects of pore structure and water vapor content on desulfurization performance.The results show that the pore structure of activated carbon with microporous and mesoporous is an important factor affecting desulfurization effect.When the moisture content is about volume fraction of 8%-11%,the desulfurization efficiency is high.The oxygen volume fraction in flue gas is as high as 3%-8%,it is enough to convert SO_(2) into sulfuric acid,therefore,there is no need to supplement additional oxygen,which solves the problem of SO_(2) removal under the condition of oxygen enrichment.Under the same experimental conditions,the desulfurization effect and stability of the self-made activated carbon are better than those of foreign products.