Kev nqus tshuaj lom neeg
Kev nqus cov pa roj carbon dioxide siv cov tshuaj tiv thaiv ntawm cov tshuaj reagents thiab carbon dioxide cais cov pa roj carbon dioxide los ntawm flue gas. Nws ntes CO2 los ntawm kev siv cov cuab yeej ntawm qee cov tshuaj reagents kom hnov mob nrog CO2 los ua cov tebchaw. Nws yog qhov tsim nyog rau cov ntawv thov uas tsis tshua muaj CO2 concentrations / ib nrab siab, xws li flue gas capture hauv thee- hluav taws xob hluav taws xob, cov nroj tsuag cement, thiab cov nroj tsuag steel. Txoj kev no yog qhov paub tab, nrog rau kev ua qauv qhia kev lag luam uas twb muaj lawm, txawm tias qhov ntsuas ntawm cov khoom siv me me.
Txoj kev nqus lub cev
Kev nqus ntawm lub cev siv cov cuab yeej uas qee cov kuab tshuaj lub cev muaj ntau dua solubility rau cov pa roj carbon dioxide ntau dua li lwm cov khoom siv hauv cov roj flue kom ua tiav cov pa roj carbon dioxide sib cais los ntawm lwm cov khoom. Kev ntes cov txheej txheem siv lub cev reagents feem ntau poob rau hauv ob pawg: ib qho siv polyethylene glycol dimethyl ether ua cov reagent ntes, nrog cov txheej txheem xws li Selexol txheej txheem tsim los ntawm Union Carbide thiab NHD txheej txheem tsim los ntawm Nanjing Chemical Industry Research Institute hauv kuv lub tebchaws; lwm tus siv methanol ua cov reagent ntes, nrog cov txheej txheem ib txwm yog Rectisol qis-kub methanol ntxuav txheej txheem sib koom ua ke tsim los ntawm Linde thiab Lurgi hauv Tebchaws Yelemees.
Physicochemical Absorption
Dhau li ntawm cov tshuaj lom neeg thiab lub cev nqus tau cov txheej txheem, qee lub tuam txhab tau tsim cov txheej txheem ntes siv cov tshuaj sib xyaw ua ke uas sib xyaw tshuaj thiab lub cev reagents. Qhov no leverages qhov kev ua tau zoo ntawm ob txoj kev thiab hu ua physicochemical absorption capture.
Novel Capture Technologies
A. Adsorption Separation Technology
Adsorption sib cais tshuab siv qhov sib txawv ntawm qhov sib txawv ntawm qhov chaw nquag ntawm qhov adsorbent nto thiab cov roj sib txawv molecules los cais cov roj sib txawv. Lub peev xwm tuav roj ntawm ib qho adsorbent feem ntau cuam tshuam rau nws qhov chaw tshwj xeeb; qhov loj dua qhov tshwj xeeb ntawm thaj chaw, qhov muaj zog ntawm cov roj tuav. Yog li ntawd, adsorbents feem ntau yog cov khoom ntxeem tau. Feem ntau siv adsorbents muaj xws li molecular sieves, activated carbon, silica gel, thiab activated alumina, los yog ua ke ntawm ob los yog ntau tshaj adsorbents. Kev tshawb fawb qhia tau hais tias vim muaj cov khoom muaj txiaj ntsig ntawm cov pa roj carbon dioxide cov qauv molecular spatial thiab polarity, feem ntau cov adsorbents muaj peev xwm adsorption ntau dua rau carbon dioxide dua li lwm cov roj xws li methane, carbon monoxide, hydrogen, thiab nitrogen. Yog li ntawd, feem ntau adsorbents tuaj yeem siv rau kev sib cais carbon dioxide.
B. Adsorption Separation Technology
Membrane sib cais yog ib txoj kev ntes cov pa roj carbon dioxide uas siv qhov sib txawv permeation ntawm cov roj sib txawv hauv qee cov ntaub ntawv membrane. Lub hauv paus ntawm membrane sib cais tshuab yog txheeb xyuas cov ntaub ntawv membrane nrog xaiv permeability rau cov roj sib txawv; cov no feem ntau yog semi-permeable, tsis yog- ntxeem tau daim nyias nyias. Gas permeation nyob rau hauv daim nyias nyias raws li ib tug dissolution - diffusion mechanism: roj molecules adsorbed ntawm ib sab ntawm daim nyias nyias yaj thiab diffuse mus rau hauv daim nyias nyias nyob rau hauv tus ntawm cov concentration gradient, ces desorb los ntawm lwm sab. Vim tias cov roj sib txawv muaj qhov sib txawv ntawm qhov sib txawv- tus nqi diffusion hauv daim nyias nyias, qhov sib cais ntawm cov roj sib txawv tuaj yeem ua tiav.