化工学报2013，Vol.64Issue(7)：2580-2586,7.DOI:10.3969/j.issn.0438-1157.2013.07.037
锰系可再生高温脱硫剂的制备及其性能测试
Preparation and characterization of manganese-based regenerable sorbents for high temperature H2S removal
摘要
Abstract
High temperature desulfurization of coal gas is a key step of integrated gasification combined cycle (IGCC) and direct reduced iron (DRI) production,which directly influences the global thermal efficiency.Manganese-based sorbents with different Mn-contents were prepared by coprecipitation method for the high temperature sulfur removal.Precipitation was conducted by neutralizing the mixed solution of manganese nitrate and alumina nitrate with 10％ NH3 · H2O at 50℃.And the pH value in precipitation was kept around 9.The sorbents prepared were tested in a fixed-bed reactor by sulfidation-regeneration cycles.XRD,SEM and BET were used to characterise the structural change of the sorbents during the cycles.The sorbents made by coprecipitation method have good Mn/Al dispersibility.The desulfurization reaction at 850℃ was rapid and quantitative.The sulfur capacity increased linearly with increase of manganese content in the sorbents.The S/Mn atomic ratio was within 0.90-0.95 after sulfurization.The sulfur capacity was not influenced by space velocity and H2S content in feed gas.The sulfided sorbent was regenerated using diluted air containing 3％ O2 at 850℃.The sulfur capacity was stable after many cycles.So,the sorbents could be used as regenerable sulfur sorbents for high temperature H2S removal.关键词
高温脱硫/锰系脱硫剂/共沉淀法Key words
high temperature H2S removal/ manganese-based regenerable sorbents/ coprecipitation分类
化学化工引用本文复制引用
郭婧,王菊,梁斌..锰系可再生高温脱硫剂的制备及其性能测试[J].化工学报,2013,64(7):2580-2586,7.基金项目
国家自然科学基金-宝钢集团联合资助项目(50876121) （50876121）
supported by the National Natural Science Foundation of China (50876121). （50876121）
