Kayayyakin kimiyyar lissafi na MDEA da ƙa'idar cire carburetiondon iskar gas
MDEA, sunan kimiyya N -methyldiethanolamine, ruwa ne mai ɗanɗano mara launi ko ɗan rawaya.
Tsarin kwayoyin halitta: CH3N(CH2CH2OH)2,
Tafasawar wuri: 246~249 ℃ /760mmhg; takamaiman nauyi: 1.0425g/ml (20 ℃);
Yanayin daskarewa: -21 ℃ (tsarki 99%); danko: 101Cp (20 ℃);
Ana iya jujjuya shi cikin sauƙi da ruwa, ethanol, ether, da sauransu; alkaline mai rauni a cikin ruwa; amsawar sinadarai zai faru a cikin iskar carbon dioxide ta acid da hydrogen sulfide, kuma a matsin lamba mafi girma, iskar carbon dioxide da hydrogen sulfide suna da mafi girma. Don haka dukkan tsarin sha shine tsarin sha na zahiri da na sinadarai.
Ruwan da ke cikin MDEA bayan ya sha hydrogen sulfide da carbon dioxide yana shiga tankin walƙiya don fitar da iskar gas mai ƙonewa, sannan a aika shi zuwa hasumiyar sabuntawa. Ana dumama ruwan mai cike da iskar gas ɗin kuma yana ruɓewa a ƙasan hasumiyar don fitar da carbon dioxide da hydrogen sulfide gaba ɗaya. A lokaci guda, iskar gas ɗin da ke ƙasan hasumiyar yana tashi don samar da wani sakamako na biyu na cire ruwa mai cike da iskar gas a saman hasumiyar; don haka dukkan tsarin sake farfadowa shine tsarin sake farfadowa na zahiri da na sinadarai. Takamaiman amsawar sinadarai shine kamar haka:
R2R'N + H2S R2R'NH + HS (amsawa nan take)
R2R'N+CO2+ H2O R2R'NH +HCO3 (aiki a hankali)
Sha da sake farfaɗowaƙa'idar cire carburetiondon iskar gas
Bayan iskar gas ɗin da ke shiga cikin iyakar batirin, mai raba matattarar za ta cire ƙazanta da ɗigon ruwa a cikin iskar gas ɗin, kuma za ta shiga hasumiyar sha daga ƙasa. A cikin hasumiyar, tana haɗuwa da maganin MDEA da aka fesa daga sama. Maganin ruwa na MDEA (maganin amine mai laushi) yana sha hydrogen sulfide da carbon dioxide a cikin iskar gas ɗin, don haka ana cire hydrogen sulfide da carbon dioxide a cikin iskar gas ɗin da ke shiga don biyan buƙatun fasaha na mai shi. Ana aika iskar gas ɗin da aka tsarkake daga iyaka ta hanyar mai raba gas ɗin da aka samar bayan ya bar saman hasumiyar sha.
A ƙarƙashin ikon bawul ɗin daidaita matakin ruwa, matakin ruwa a ƙasan hasumiyar shaye-shaye yana isar da amine mai wadata zuwa tankin walƙiya. Amine mai wadata daga ƙasan hasumiyar shaye-shaye yana shiga tankin walƙiya. Yawancin hydrocarbons da aka shaye cikin amine mai wadata suna ɓacewa zuwa matakin iskar gas mai walƙiya. A ƙarƙashin ikon bawul ɗin daidaita matsin lamba, ana dawo da tururin walƙiya zuwa tsarin iskar gas. Ana aika ruwan amine mai wadata zuwa mai musayar zafi na amine mai laushi/mai arziki. Amine mai laushi mai zafi daga hasumiyar sabuntawa yana dumama amine mai wadata daga tankin walƙiya, sannan amine mai arziki ya shiga hasumiyar sake farfaɗowar amine.
Tururin da injin sake tafasawa da ke ƙasan hasumiyar sake tafasawa ta amine ke samarwa yana haɗuwa da ruwan amine mai ƙarfi, yana cire iskar acid daga gare ta, don haka yana kammala farfaɗo da ruwan amine mai ƙarfi. A ƙarƙashin ikon bawul ɗin daidaita matakin ruwa a ƙasan hasumiyar sake tafasawa ta amine, ruwan amine mai zafi mai laushi yana kwarara zuwa mai musayar zafi na amine mai laushi/mai arziki. Famfon ƙarfafa amine mai laushi yana matse amine a cikin tankin buffer na amine da 1.0mpa sannan ya aika shi zuwa hasumiyar sha. An sanya bawul mai daidaita kwarara a kan bututun amine mai laushi zuwa hasumiyar sha, wanda ta haka ake sarrafa ruwan amine mai laushi zuwa hasumiyar sha.
