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MDEA Physicochemical properties lemolao-motheo oa decarburizationbakeng sa khase ea tlhaho

MDEA, lebitso la saense N -methyldiethanolamine, ke mokelikeli o nang le viscous o se nang mebala kapa o mosehla hanyenyane.

Foromo ea molek'hule: CH3N(CH2CH2OH)2 ,

Sebaka se belang: 246 ~ 249 ℃ /760mmhg; matla a khoheli: 1.0425g/ml (20 ℃);

Sebaka sa leqhoa: -21 ℃ (bohloeki 99%); viscosity: 101Cp (20 ℃);

E ka kopanngoa habonolo le metsi, ethanol, ether, joalo-joalo; alkaline e fokolang ka metsing; karabelo ea lik'hemik'hale e tla etsahala ka acid ea carbon dioxide le khase ea hydrogen sulfide, 'me ka khatello e phahameng, khase ea carbon dioxide le hydrogen sulfide e phahame Kahoo ts'ebetso eohle ea ho monya ke mokhoa oa ho monya 'meleng le lik'hemik'hale.

Mokelikeli o ruileng oa MDEA ka mor'a ho monya hydrogen sulfide le carbon dioxide e kena ka tanka ea flash bakeng sa vacuum flash evaporation, ebe e romeloa toreng ea tsosoloso. Mokelikeli o nonneng oa futhumatsoa 'me oa bola ka tlaase ho tora hore o lokolle carbon dioxide le hydrogen sulfide ka ho feletseng. Ka nako e ts'oanang, khase e botlaaseng ba tora ea phahama ho theha phello ea bobeli ea ho hlobola mokelikeli o ruileng o kaholimo ho tora.; kahoo ts'ebetso eohle ea ho tsosolosoa hape ke ts'ebetso ea tsosoloso ea 'mele le ea lik'hemik'hale. Karabelo e khethehileng ea lik'hemik'hale ke e latelang:

R2R'N + H2S R2R'NH +HS (karabelo hang hang)

R2R'N+CO2+ H2O R2R'NH +HCO3 (karabelo e butle)

Ho monya le ho nchafatsamolao-motheo oa decarburizationbakeng sa khase ea tlhaho

Ka mor'a hore khase ea phepelo e kene moeling oa betri, litšila le marotholi ka har'a khase li tlosoa ke sekhetho sa sefahla, 'me se kena ka tora ea ho monya ho tloha tlase. Ka tora, e kopane le tharollo ea MDEA e fafalitsoeng ho tloha holimo. Mokelikeli oa metsi oa MDEA (amine lean solution) o monya hydrogen sulfide le carbon dioxide ka har'a khase ea tlhaho, e le hore hydrogen sulfide le carbon dioxide ka khase ea phepelo li tlosoe ho fihlela litlhoko tsa tekheniki tsa mong'a lona. Khase e hloekisitsoeng e romelloa ka ntle ho moeli ka sekhetho sa khase ea sehlahisoa ka mor'a hore e tlohe ka holim'a tora ea ho monya.

Tlas'a taolo ea valve e laolang boemo ba mokelikeli, boemo ba mokelikeli bo tlase ba tora ea ho monya bo fetisetsa amine e ruileng ho tanka ea flash. Amine e ruileng e tsoang tlase ea tora ea ho monya e kena ka tanka ea flash. Bongata ba li-hydrocarbon tse kenngoeng ka har'a amine e ruileng li tšeloa mokhahlelong oa khase ea flash. Tlas'a taolo ea valve e laolang khatello, mouoane oa flash o khutlisetsoa tsamaisong ea khase ea mafura. Mokelikeli o ruileng oa amine o romelloa ho mocheso oa mocheso oa amine o fokolang / o ruileng. Amine e chesang e chesang e tsoang mohahong oa tsosoloso e futhumatsa amine e ruileng ho tloha tanka ea flash, ebe amine e ruileng e kena toreng ea tsosoloso ea amine.

Mouoane o hlahisoang ke reboiler botlaaseng ba tora ea ho tsosolosa amine e kopana le tharollo ea amine e ruileng, e tlosa khase ea acid ho eona, kahoo e phethela ho tsosolosoa ha amine e ruileng. Tlas'a taolo ea valve e laolang boemo ba mokelikeli botlaaseng ba tora ea ho tsosolosoa ha amine, tharollo ea amine e chesang e phallang ho ea ho mocheso oa mocheso oa amine. Pompo e matlafatsang ea amine e hatella amine ka tankeng ea amine buffer ka 1.0mpa ebe e e romela toreng ea ho monya. Valfo e laolang phallo e kentsoe phaepheng ea lean amine ho ea tora ea ho monya, eo ka eona amine e phallang e kenang tora ea ho monya e laoloang.