燃料化学学报
燃料化學學報
연료화학학보
JOURNAL OF FUEL CHEMISTRY AND TECHNOLOGY
2014年
4期
399-407
,共9页
化学链燃烧( CLC)%CaSO4氧载体%CaO添加剂%气体硫化物抑制%CO2固化
化學鏈燃燒( CLC)%CaSO4氧載體%CaO添加劑%氣體硫化物抑製%CO2固化
화학련연소( CLC)%CaSO4양재체%CaO첨가제%기체류화물억제%CO2고화
chemical-looping combustion (CLC)%CaSO4 oxygen carrier%CaO additive%suppression of sulfur release%CO2 absorption
以小型流化床为反应器、水蒸气为气化介质,在CaSO4氧载体中加入CaO颗粒进行煤气化-氧载体还原反应实验。实验结果表明,添加CaO改善了煤气化-CaSO4还原反应性能,提高了煤气化-CaSO4还原反应速率和CO2生成速率。但CaO添加剂的催化作用随反应温度的提高而减弱。900℃是较适宜的反应温度,此温度下加入适量CaO( CaO/CaSO4物质的量比1.18),气态硫化物释放得到显著抑制,SO2和H2 S降幅分别为63.19%和27.37%;同时,还能控制CO2被吸收固化成CaCO3的比例低于2%。
以小型流化床為反應器、水蒸氣為氣化介質,在CaSO4氧載體中加入CaO顆粒進行煤氣化-氧載體還原反應實驗。實驗結果錶明,添加CaO改善瞭煤氣化-CaSO4還原反應性能,提高瞭煤氣化-CaSO4還原反應速率和CO2生成速率。但CaO添加劑的催化作用隨反應溫度的提高而減弱。900℃是較適宜的反應溫度,此溫度下加入適量CaO( CaO/CaSO4物質的量比1.18),氣態硫化物釋放得到顯著抑製,SO2和H2 S降幅分彆為63.19%和27.37%;同時,還能控製CO2被吸收固化成CaCO3的比例低于2%。
이소형류화상위반응기、수증기위기화개질,재CaSO4양재체중가입CaO과립진행매기화-양재체환원반응실험。실험결과표명,첨가CaO개선료매기화-CaSO4환원반응성능,제고료매기화-CaSO4환원반응속솔화CO2생성속솔。단CaO첨가제적최화작용수반응온도적제고이감약。900℃시교괄의적반응온도,차온도하가입괄량CaO( CaO/CaSO4물질적량비1.18),기태류화물석방득도현저억제,SO2화H2 S강폭분별위63.19%화27.37%;동시,환능공제CO2피흡수고화성CaCO3적비례저우2%。
The reactivity between the CaSO4 oxygen carrier with CaO additive and coal under steam atmosphere was studied in a fluidized bed reactor. The experimental results show that the addition of CaO can improve the performance of both coal gasification and CaSO4 reduction, and increase the reaction rate of coal gasification and CaSO4 reduction and the CO2 generating rate. However, the catalysis of CaO drops as the reaction temperature rises. And the optimum reaction temperature is 900 ℃, at which the releases of gaseous sulfides are remarkably decreased by 63. 19% and 27. 37% for SO2 and H2S, respectively, as the molar ratio of CaO to CaSO4 is 1. 18. Meanwhile, the amount of CO2 absorbed by CaO can be controlled to less than 2% .