摘要
文章通过搭建一个模拟工业吸收CO2的喷雾填料塔,探究1,8-二氮杂双环[5,4,0]十一碳-7-烯（DBU）吸收液浓度、液气比、气体温度、入口CO2浓度对CO2吸收的影响。研究发现,DBU浓度从1%增加到25%,CO2脱除率（η）从18.24%增加到96.6%,增幅明显;随着液气比的增加（从7L/m3增加到57L/m3）,η从31.29%增大到90.14%;气体温度在25~40℃时,η从90.14%增加到95.71%,在40~60℃时,从95.71%下降到84.55%;入口CO2浓度从4.5%增加到15%,η从93%下降到50%。DBU吸收液浓度和入口CO2浓度升高,CO2吸收能力逐渐增大;液气比增加,CO2吸收能力先增后减;气体温度升高,CO2吸收能力逐渐减小。
A bench-scale experimental spray-packed scrubber was used to study the CO2 absorption by DBU（1,8-diazabicyclo [5,4,0]under-7-ene） absorbent solution which was affected by the factors including DBU solution concentration,liquid to gas（L/G） ratio,gas temperature and inlet CO2 concentration. The study showed that CO2 removal efficiency（η）was up from 18.24% to 96.6% when DBU solution concentration increased from 1% to 25%;with the increase of L/G ratio from 7L/m3 to 57L/m3,η rose from 31.29% to 90.14%;η increased from 90.14% to 95.71% as gas temperature was raised from 25 ℃ to 40 ℃,while fell from 95.71% to 84.55% as gas temperature was increased from 40 ℃ to 60 ℃. As to the influence of inlet CO2 concentration,an increase from 4.5% to 15% would let η drop from 93% to 50%;as for DBU absorbent solution and inlet CO2,when their concentrations were increased,CO2 absorptive capacity went up as well.Furthermore,with the increase of L/G ratio,CO2 absorptive capacity was strengthened at first and then weakened;and increases of gas temperature would make CO2 absorptive capacity drop.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2015年第3期86-90,共5页
Environmental Science & Technology
基金
国家自然科学基金项目(51076068)
江苏省"六大人才高峰"项目资助(2013-JNHB-021)
江苏省高校科研成果产业化推进项目(JHB2011-14)
南京信息工程大学科研预研基金(20110376)
江苏高校优势学科建设工程项目资助
关键词
喷雾填料塔
DBU
CO2
脱除率
吸收能力
spray-packed scrubber
DBU
CO2
removal efficiency
absorptive capacity
