Li-sieve tsa molek'hule tsa Zeolite li bapala karolo ea bohlokoa ts'ebetsong ea khase ea tlhaho ka ho etsa mesebetsi ea bohlokoa ea tlhoekiso (e kang dehydration, desulfurization, le decarbonization joalo-joalo) ka ho khetha, ka hona ho ntlafatsa boleng ba khase ea tlhaho le ho netefatsa lipalangoang tse sireletsehileng.
Phello ea Khase ea Tlhaho
Khase ea tlhaho e hlahisoa ka mouoane oa metsi, esita le ho nka metsi a mangata. Ho ba teng ha metsi ka khase ea tlhaho ke ntho e mpe haholo, e etsang hore khase ea tlhaho e fokotsehe e be ntho e hlokahalang. Ka mohlala:
Metsi le methane li etsa leqhoa-joaloka li-hydrate tse tiileng tlas'a mocheso o tlase le khatello e phahameng (joalo ka liphaepheng tsa liphaephe kapa lits'ebetsong tsa ho ntša metsi), e ka koalang li-valve, liphaephe le lisebelisoa, ho baka tšitiso ea lipalangoang.
Metsi a kopana le hydrogen sulfide kapa carbon dioxide ka khase ea tlhaho ho hlahisa lintho tse nang le asiti (sulfuric acid, carbonic acid), e potlakisang ho bola ha lipeipi tsa tšepe le lisebelisoa le ho khutsufatsa bophelo ba bona ba ts'ebeletso.
Ha khase ea tlhaho e hloka pholileng e tebileng, kaha khase ea tlhaho e qhibilihisitsoeng (LNG) e hloka ho pholile ho isa ho -162 degree, mongobo o setseng o tla hoama le ho senya lisebelisoa tsa bohlokoa joalo ka li-exchangers tsa mocheso oa cryogenic.
Li-sieve tsa limolek'hule, ka boholo ba tsona ba pore, ka ho khetheha li khahlisa limolek'hule tsa metsi. Bokhoni ba ho khantša metsi bo ka holimo ho 22% ea boima ba bona, bo ka fokotsang phoka ea khase ea tlhaho ho ea ka tlase ho -70℃le ho fumana metsi a tebileng.
Ho Monate Khase ea Tlhaho
Ho natefisa khase ea tlhaho ke mokhoa oa desulfurization le decarbonization. Hydrogen sulfide le carbon dioxide ka khase ea tlhaho li ka etsa asiti (ka metsi), 'me tsa baka kutu liphaepheng le lisebelisoa. Hydrogen sulfide le eona ke khase e chefo e amang bophelo bo botle le polokeho.
Sieve ea molek'hule e reretsoe ho tlosa hydrogen sulfide le carbon dioxide ho ea boemong ba PPM kapa esita le PPB. Sena se thusa ho fokotsa ho bola, ho eketsa boleng ba lik'halori, le ho finyella litekanyetso tsa khoebo tsa khase ea tlhaho boleng le lipalangoang.
Ntle le sebabole sa inorganic, li-sieve tsa limolek'hule li ka boela tsa sebelisa sebabole sa tlhaho joalo ka methyl mercaptan, ethyl mercaptan, propyl mercaptan, methyl sulfide le thiophene, kaofela ka lebaka la sebaka sa tsona se seholo se ikhethileng le bophahamo ba pore.
Li-Sieves tsa Zeolite Molecular For Natural Gas Processing
Mofuta oa 3A zeolite molecular sieve: Boholo ba pore ea eona ke 3Å, 'me e sebelisoa haholo ho bapa limolek'hule tsa metsi ka bophara ba hoo e ka bang 2.8Å. E ka tlosa mongobo hantle ho khase ea tlhaho ha e ntse e qoba ho ata ha li-hydrocarbon, e etsa hore e tšoanelehe bakeng sa ho felloa ke metsi ka khase ea tlhaho.
Mofuta oa 4A zeolite molecular sieve: Boholo ba pore ea eona ke 4Å, 'me e ka khetha limolek'hule tsa metsi (diameter 2.8Å). E boloka matla a phahameng a adsorption mochesong o phahameng 'me e loketse ho omisa ka botebo ba khase ea tlhaho. Leha ho le joalo, hoa lokela ho hlokomeloa hore e ka 'na ea e-ba le li-hydrocarbon tse bobebe.
Mofuta oa 5A zeolite molecular sieve: Boholo ba pore ea eona ke 5Å, 'me e ka sebelisoa ho sebetsa ha khase ea tlhaho bakeng sa ho kenngoa ha metsi, li-hydrocarbon tse khanyang, carbon dioxide, hydrogen sulfide, mercury, joalo-joalo. Mohlala, ho tlosa trace amount of hydrogen sulfide from motsoako oa methane le carbon dioxide.
Mofuta oa 13X zeolite molecular sieve: Boholo ba pore ea eona ke 10Å, 'me e na le matla a matla a adsorption bakeng sa carbon dioxide, e ka khona ho sebelisa metsoako ea sebabole e kang hydrogen sulfide le mercaptans, ho tlosa litšila tse kang li-hydrocarbon tse boima le li-hydrocarbon tse nkhang hamonate limela tsa LNG.
