Umgangatho ophezulu weYunithi yokuFakwa kweGesi yeNdalo yaseTshayina-indlela ye-MDEA yokutshibiliza i-skid yezixhobo zokulungisa igesi yendalo – eRongteng

Inkcazo

I-decarburization yegesi yendalo (i-decarbonization) skid, sisixhobo esiphambili ekuhlanjululweni kwegesi yendalo okanye unyango.

Umxholo wekhabhon diokside kumgangatho womgangatho wegesi yendalo akufanele ube ngaphezu kwe-3%. Kwaye ikharbon diokside emanzini emva kokuba intsimbi inomhlwa owomeleleyo. Ukuba ixabiso le-pH liyafana, umlinganiselo we-asidi ye-carbon dioxide nayo iphezulu, ngoko iqondo lokutya kwekhabhon diokside kwintsimbi nalo liphezulu.

Ke ngoko, kwimfuno ye-decarburization yegesi yendalo, kuyafuneka ukuba ube nefuthe elinamandla le-thermal kwinkqubo ye-decarburization, ngoko ke igesi yendalo emva kokuthomalalisa unyango lobushushu ayifanelekanga kwi-decarburization yegesi yendalo. Nangona kunjalo, ukuba asiyi kuqwalasela iimveliso ze-decarbonization yegesi yendalo, kodwa samkele indlela yokuhlukana kweqondo lokushisa eliphantsi, kuya kukhokelela ngokuthe ngqo ekusebenzeni kwegesi yendalo ye-decarbonization. Okwangoku, ukusetyenziswa kwegesi yendalo yonyango lwe-decarbonization kunokwenza kuphela indlela ye-ammonia yotywala.

Itshathi equkuqelayo

Ngokweempawu zobuchwepheshe be-MDEA, inkqubo yokuhlaziya inxenye iyafuneka kwi-decarbonization yegesi yendalo. Phakathi kwabo, igesi yendalo ingena kakhulu kwi-absorber ukusuka ezantsi, kunye noqhagamshelwano kunye nesisombululo se-MDEA ukusuka phezulu ukuya phezulu kwi-absorber, kodwa ininzi yesisombululo se-carbon dioxide kwigesi yendalo i-decarbonized. Irhasi yendalo emanzi esulungekileyo ihlukaniswe ikakhulu yinqaba yokufunxa kwaye ipholile, kwaye emva koko iphelelwe ngamanzi. I-MDEA esuka ezantsi kwinqaba yokufunxa idinga amandla okungena kunyango lokuphelelwa ngamanzi emzimbeni, kwaye inxalenye ephezulu yenqaba yokufunxa ingena kwinqaba. Emva kokunciphisa, i-carbon dioxide efunyenweyo isonjululwe kwaye ishushu ngumphunga phakathi kwenqaba yokuvuselela. Ngaloo ndlela kuphela ubushushu besisombululo bunokugcinwa. Emva kokuba isisombululo se-MDEA esivela ezantsi kwinqaba sipholile, isisombululo singena phezulu kwi-absorption, ukuze kugqitywe yonke inkqubo yokujikeleza kwesisombululo. Ukongezelela, ukwenzela ukuba kuqinisekiswe ngokufanelekileyo ukuba isisombululo sinokuphinda sisetyenziswe kwaye sicocwe kwakhona, i-15% yesisombululo iyadingeka ekususweni kwesisombululo. Ukuze kugcinwe inkqubo ye-decarbonization yegesi yendalo, inkqubo iya kuhlaziywa ngesisombululo.

Iimpawu ezisebenzayo

Ukusebenza kwe-decarbonization ngendlela ye-MDEA yi-99%.
Ukuze kususwe i-carbon dioxide (CO2) kwigesi yokutya, isisombululo esinamanzi kunye ne-alcohol amine njengoko i-solvent isabela nge-CO2 kwigesi yokutya. Ukulahleka kwegesi ephantsi kunye nokusetyenziswa kwamandla aphezulu. Indlela ye-alcohol amine ingasetyenziselwa ukususa i-H2S kwigesi yokutya.