Igesi yemvelo ekhishwe iqukethe inani elithile legesi ene-asidi i-CO2, engabangela izinkinga ezifana nokwehla kwenani lama-calorie kanye nokugqwala kwepayipi. Ngakho-ke, ukwelashwa kokususa i-carbonization kuyadingeka ngaphambi kokuthuthwa nokusetshenziswa kwepayipi.
Ngokusho kwefomula yenani lamakhalori egesi yemvelo kuzinga likazwelonke (GB/T 11062-2014), kungabalwa ukuthi i-10mol% CO2 izobangela ukwehla okungu-9.80% enanini lamakhalori e-methane ngemitha eyi-cubic. Uma i-CO2 ihlangana nomhwamuko wamanzi futhi inomfutho oyingxenye ongaphezu kuka-207kPa, izobangela ukugqwala okukhulu emishinini nasemapayipini, futhi kudingeka kuthathwe izinyathelo ezengeziwe zokulwa nokugqwala. Ngakho-ke, igesi yemvelo kumele isuswe ngokuqinile i-CO2 ngaphambi kokuba ithuthwe iye emapayipini ezentengiselwano.
Inqubo ye-MDEA iyasetshenziswa ukususa i-CO2 kugesi yemvelo.
Izakhiwo ze-MDEA ze-physicochemical kanye nesimiso sokususa i-carb
I-MDEA, igama lesayensi elithi N-methyldiethanolamine, iwuketshezi oluqinile olungenambala noma oluphuzi kancane.
Ifomula yama-molecule: CH3N(CH2CH2OH)2,
Iphuzu lokubila: 246~249 ℃ /760mmhg; amandla adonsela phansi athile: 1.0425g/ml (20 ℃);
Iphuzu lokuqandisa: -21 ℃ (ubumsulwa 99%); i-viscosity: 101Cp (20 ℃);
Ingaxutshwa kalula namanzi, i-ethanol, i-ether, njll.; i-alkaline encane emanzini; ukusabela kwamakhemikhali kuzokwenzeka ku-acid carbon dioxide kanye negesi ye-hydrogen sulfide, futhi uma ingcindezi iphezulu, igesi ye-carbon dioxide kanye ne-hydrogen sulfide iba phezulu Ngakho-ke yonke inqubo yokumunca iyinqubo yokumunca ngokomzimba namakhemikhali.
Uketshezi olucebile lwe-MDEA ngemuva kokumunca i-hydrogen sulfide kanye ne-carbon dioxide lungena ethangini le-flash ukuze luphume nge-vacuum flash, bese luthunyelwa embhoshongweni wokuvuselela. Uketshezi olucebile luyashiswa futhi luboliswe phansi kombhoshongo ukuze lukhiphe ngokuphelele i-carbon dioxide kanye ne-hydrogen sulfide. Ngesikhathi esifanayo, igesi ephansi kombhoshongo iyakhuphuka ukuze yakhe umphumela wesibili wokuhlubula kuketshezi olucebile phezulu kombhoshongo. ngakho-ke yonke inqubo yokuvuselela nayo iyinqubo yokuvuselela ngokomzimba namakhemikhali. Ukusabela kwamakhemikhali athile kungokulandelayo:
R2R'N + H2S R2R'NH +HS (ukusabela okusheshayo)
R2R'N+CO2+ H2O R2R'NH +HCO3 (ukusabela okuhamba kancane)
UHengzhong ugxile ekwelapheni izinsiza zemithombo yegesi, ukuhlanzwa kwegesi yemvelo, ukutakula i-LPG, Isitshalo se-LNG futhi isethi yejeneretha yegesi yemvelo.
Xhumana:
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Isikhathi sokuthunyelwe: Disemba-03-2023