钙基吸附剂循环捕获CO_2反应动力学研究
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摘要
在CO_2的减排技术中,钙基吸附剂循环捕集CO_2由于具有原材料来源广泛、吸附容积大等优点受到越来越多的关注,但钙基吸附剂在循环反应过程中活性会不断衰减。以2种天然前躯体(白云石、石灰石)和3种人工前躯体(葡萄糖酸钙、柠檬酸钙、乙酸钙)制备Ca O吸附剂,对循环曲线进行动力学分析。研究发现以白云石为前驱体制备的吸附剂反应速率较快、循环转化率最高、稳定性好,拟合100次循环后转化率仍高达40%。
In the capture CO_2 process from flue gas, calcium based sorbent has attracted more and more attention because of its advantages of wide source of raw materials and large adsorption capacity. However, its capacity could continue to decrease during the cyclic cycle. In this paper, two kinds of natural precursors(dolomite, limestone) and three kinds of artificial precursors(calcium gluconate, calcium citrate and calcium acetate) were used to prepare high efficiently Ca O sorbents.Moreover, the cyclic kinetic analysis was carried out. It is found that the adsorption rate of dolomite as the precursor is faster,the conversion rate is the highest and the stability is the best. After 100 cycles, its conversion rate can remain at 40%.
In the capture CO_2 process from flue gas, calcium based sorbent has attracted more and more attention because of its advantages of wide source of raw materials and large adsorption capacity. However, its capacity could continue to decrease during the cyclic cycle. In this paper, two kinds of natural precursors(dolomite, limestone) and three kinds of artificial precursors(calcium gluconate, calcium citrate and calcium acetate) were used to prepare high efficiently Ca O sorbents.Moreover, the cyclic kinetic analysis was carried out. It is found that the adsorption rate of dolomite as the precursor is faster,the conversion rate is the highest and the stability is the best. After 100 cycles, its conversion rate can remain at 40%.
引文
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[14]Nikulshina V,Gálvez M E,Steinfeld A.Kinetic Analysis of the Carbonation Reactions for the Capture of CO2from Air via the Ca(OH)2-Ca CO3-Ca O Solar Thermochemical Cycle[J].Chemical Engineering Journal,2007,129(1/3):75-83.
[15]李清辉.Ca O基高温CO2吸附剂研究[D].浙江:浙江大学,2007.
[16]蔡宁生,房凡,李振山.钙基吸收剂循环煅烧/碳酸化法捕集CO2的研究进展[J].中国电机工程学报,2010,30(26):35-43.
[17]刘红玲.钙基吸收剂高温顺序脱除SO2/CO2反应研究[D].山东:山东大学,2012.
[18]Arias B,Grasa G S,Abanades J C.Effect of Sorbent Hydration on the Average Activity of Ca O in a Ca-Looping System[J].Chemical Engineering Journal,2010,163(3):324-333.
[2]Coninck H C de,Loos M A,Metz B,et al.IPCC Special Report on Carbon Dioxide Capture and Storage[M].London:Cambridge University Press,2005.
[3]Herce C,Stendardo S,Cortés C.Increasing CO2Carrying Capacity of Dolomite by Means of Thermal Stabilization by Triggered Calcination[J].Chemical Engineering Journal,2015,262:18-28.
[4]Lu Hong,Khan A,Pratsinis S E,et al.Flame-Made Durable Doped-Ca O Nanosorbents for CO2Capture[J].Energy and Fuel,2009,23(2):1093-1100.
[5]Silaban A,Narcida M,Harrison D P.Calcium Acetate as a Sorbent Precursor for the Removal of Carbon Dioxide from Gas Streams at High Temperature[J].Resources Conservation and Recycling.1992,7(1/3):139-153.
[6]Liu Wenqiang,Nathanael WL Low,Feng Bo,et al.Calcium Precursors for the Production of Ca O Sorbents for Multicycle CO2Captures[J].Environmental Science and Technology,2010,44(9):841-847.
[7]Stendardo S,Andersen L K,Herce C.Self-activation and Effect of Regeneration Conditions in CO2-Carbonate Looping with Ca O-Ca12Al14O33Sorbent[J].Chemical Engineering,2013,220(6):383-394.
[8]Derevschikov V S,Lysikov A L,Okunev A G.High Temperature Ca O/Y2O3Carbon Dioxide Absorbent with Enhanced Stability for Sorption-Enhanced Reforming Applications[J].Industrial Engineering Chemistry Research,2011,50(22):12741-12749.
[9]刘长天,李庆亮,李英杰,等.木醋废液调质石灰石循环捕集CO2反应特性[J].山东大学学报(工学版),2013,43(3):82-86.
[10]Li Yingjie,Sun Rongyue,Liu Hongliang,et al.Cyclic CO2Capture Behavior of Limestone Modified with Pyroligneous Acid(PA)during Calcium Looping Cycles[J].Industrial Engineering Chemistry Research,2011,50(17):10222-10228.
[11]Zeman F.Effect of Steam Hydration on Performance of Lime Sorbent for CO2Capture[J].International Journal of Greenhouse Gas Control,2008,2(2):203-209.
[12]Bhatia S K,Perlmutter D D.Effect of the Product Layer on the Kinetics of the CO2-Lime Reaction[J].AICHE,1983,29(1):79-86.
[13]师琦,吴素芳,蒋明哲,等.纳米钙基CO2吸附剂反应吸附与分解动力学[J].化工学报,2009,60(3):641-648.
[14]Nikulshina V,Gálvez M E,Steinfeld A.Kinetic Analysis of the Carbonation Reactions for the Capture of CO2from Air via the Ca(OH)2-Ca CO3-Ca O Solar Thermochemical Cycle[J].Chemical Engineering Journal,2007,129(1/3):75-83.
[15]李清辉.Ca O基高温CO2吸附剂研究[D].浙江:浙江大学,2007.
[16]蔡宁生,房凡,李振山.钙基吸收剂循环煅烧/碳酸化法捕集CO2的研究进展[J].中国电机工程学报,2010,30(26):35-43.
[17]刘红玲.钙基吸收剂高温顺序脱除SO2/CO2反应研究[D].山东:山东大学,2012.
[18]Arias B,Grasa G S,Abanades J C.Effect of Sorbent Hydration on the Average Activity of Ca O in a Ca-Looping System[J].Chemical Engineering Journal,2010,163(3):324-333.