Siffofin kwayoyin halitta na Zeolite suna taka muhimmiyar rawa a sarrafa iskar gas ta hanyar aiwatar da mahimman ayyukan tsarkakewa (kamar bushewar ruwa, desulfurization, da decarbonization da sauransu) ta hanyar zaɓin talla, don haka inganta ingancin iskar gas da tabbatar da sufuri mai lafiya.
Rashin Ruwan Gas Na Halitta
Ana samar da iskar gas da tururin ruwa, har ma yana ɗaukar wani adadin ruwan ruwa. Kasancewar ruwa a cikin iskar gas abu ne mara kyau, wanda ke sanya rashin ruwa ya zama dole. Misali:
Ruwa da methane suna yin ƙanƙara{0}kamar ƙaƙƙarfan hydrates a ƙarƙashin ƙarancin zafin jiki da matsanancin matsin lamba (kamar jigilar bututun mai ko tsarin sarrafa ruwa), wanda zai iya toshe bawuloli, bututun, da kayan aiki, yana haifar da katsewar sufuri.
Ruwa yana amsawa da hydrogen sulfide ko carbon dioxide a cikin iskar gas don samar da abubuwa masu acidic (sulfuric acid, carbonic acid), wanda ke hanzarta lalata bututu da kayan aiki da rage rayuwar sabis.
Lokacin da iskar gas ke buƙatar zurfin sanyaya, kamar yadda iskar gas mai ruwa (LNG) ke buƙatar sanyaya zuwa -162 digiri, ragowar danshi zai daskare kuma ya lalata kayan aiki mai mahimmanci kamar masu musayar zafi na cryogenic.
Siffofin kwayoyin halitta, tare da girman huruminsu iri ɗaya, sun gwammace su lalata ƙwayoyin ruwa. Ƙarfin adsorption na ruwa yana da girma kamar 22% na nauyin nasu, wanda zai iya rage raɓar iskar gas zuwa ƙasa -70 digiri kuma cimma zurfin bushewa.
Daɗaɗɗen Iskar Gas
Gas sweetening shine tsari na desulfurization da decarbonization. Hydrogen sulfide da carbon dioxide a cikin iskar gas na iya haifar da acid (tare da ruwa), kuma suna haifar da lalata a cikin bututu da kayan aiki. Hydrogen sulfide kuma iskar gas ne mai guba wanda ke shafar lafiya da aminci.
Molecular sieve yana nufin cire hydrogen sulfide da carbon dioxide zuwa PPM ko ma matakin PPB. Wannan yana taimakawa wajen rage lalata, ƙara ƙimar calorific, da saduwa da ka'idodin kasuwanci na iskar gas a cikin inganci da sufuri.
Bugu da ƙari ga sulfur na inorganic, sieves na ƙwayoyin cuta kuma na iya haɓaka sulfur na halitta kamar su methyl mercaptan, ethyl mercaptan, propyl mercaptan, methyl sulfide, da thiophene, duk godiya ga babban yanki na musamman da kuma ƙarar pore.
Sieves Molecular na Zeolite Don Gudanar da Gas Na Halitta
Nau'in 3A zeolite molecular sieve: Girman pore ɗin sa shine 3Å, kuma ana amfani dashi galibi don adsorb kwayoyin ruwa tare da diamita na kusan 2.8Å. Yana iya kawar da danshi da kyau daga iskar gas yayin da yake guje wa adsorption na hydrocarbons, yana sa ya dace da bushewar iskar gas.
Nau'in 4A zeolite molecular sieve: Girman pore ɗin sa shine 4Å, kuma yana iya zaɓin zaɓin kwayoyin ruwa (diamita 2.8Å). Yana kula da babban ƙarfin adsorption a yanayin zafi kuma ya dace da bushewa mai zurfi na iskar gas. Duk da haka, ya kamata a lura da cewa shi zai iya adsorb wasu haske hydrocarbons.
Nau'in 5A zeolite molecular sieve: Girman pore ɗin sa shine 5Å, kuma ana iya amfani dashi a sarrafa iskar gas don ɗaukar ruwa, hydrocarbons mai haske, carbon dioxide, hydrogen sulfide, mercury, da sauransu. Misali, cire adadin hydrogen sulfide daga cakuda methane da carbon dioxide.
Nau'in 13X zeolite molecular sieve: Girman girmansa shine 10Å, kuma yana da ƙarfin adsorption don carbon dioxide, yana iya haɓaka mahaɗan sulfur kamar hydrogen sulfide da mercaptans, cire ƙazanta irin su hydrocarbons masu nauyi da hydrocarbons mai ƙanshi a cikin tsire-tsire na LNG.