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高溫載硫活性炭的制備及脫汞能力研究

Preparation of sulfur-loaded activated carbons for removing gaseous elemental mercury

【作者】顏甜；左宋林；趙昕；張宏陽；施蔭銳；荀永葆

【機構(gòu)】南京林業(yè)大學化學工程學院；南京正森化工實業(yè)有限公司

【摘要】研究了載硫溫度、硫炭比(簡稱S/C),吸附溫度等因素對載硫活性炭的硫含量、脫汞能力以及硫損失的影響,探討載硫活性炭制備的工藝條件優(yōu)化。結(jié)果表明,不同載硫溫度下制備的載硫活性炭的氣態(tài)Hg0

吸附能力遠強于原料活性炭;載硫溫度不同時,負載到活性炭孔隙或表面上的硫的形態(tài)不同,導致了脫汞能力的差異,較合適的載硫溫度為350℃;S/C為5%(質(zhì)量分數(shù),下同)時,隨著吸附溫度的升高,載硫活性炭的氣態(tài)Hg0吸附量降低;在一定的載硫溫度下,原料中S/C越高時,制備的載硫活性炭的硫含量越高、氣態(tài)Hg0吸附能力越強,但其硫損失率也越高,從實際的使用效果來看,較合適的S/C為10%。 更多還原

【Abstract】 Series of sulfur-loaded activated carbons were prepared for removing gaseous elemental mercury from simulated flue gas.The effects of sulfur loading temperature,sulfur and carbon

ratio(S/C),and adsorption temperature on the sulfur-loaded activated carbons were investigated from 3 aspects of sulfur loading quantity,mercury adsorption capacity and sulfur stability.Results showed that the mercury removal ability of sulfur loaded activated carbon was much higher than raw activated carbon;the form of sulfur that loading on the surface or pore of activated carbon was different under different loading temperature,the best temperature for sulfur loading was 350 ℃.When the S/C was 5%(mass ratio),mercury capture ability of the activated carbons was decreased with increasing the adsorption temperature.Under the same loading temperature,higher sulfur loading content would promote mercury capture ability but also increase the sulfur loss,and the optimal S/C was 10%···

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