Zeolite molecular sieves inoita basa rakakosha mukugadzirisa gasi rechisikigo nekuita akakosha ekuchenesa mabasa (sekubvisa mvura, desulfurization, uye decarbonization nezvimwewo) kuburikidza nekusarudza adsorption, saka inovandudza kunaka kwegasi rechisikigo uye kuve nechokwadi chekufambisa kwakachengeteka.
Natural Gasi Dehydration
Gasi rechisikigo rinogadzirwa nemhute yemvura, uye inotakura imwe huwandu hwemvura yemvura. Kuvapo kwemvura mugasi rechisikigo chinhu chakaipa kwazvo, chinoita kuti gasi remvura rive chinhu chinodiwa. Semuyenzaniso:
Mvura nemethane zvinoumba aizi-semvura yakasimba pasi petembiricha yakaderera uye kudzvanywa kwakanyanya (sekufambisa kwepaipi kana kunyunguduka), iyo inogona kuvhara mavharuvhu, mapaipi, uye midziyo, zvichikonzera kukanganisa kwekufambisa.
Mvura inopindirana nehydrogen sulfide kana carbon dioxide mugasi rechisikigo kuti ibudise zvinhu zvine acidic (sulfuric acid, carbonic acid), iyo inomhanyisa kuparara kwepombi dzesimbi nemidziyo uye inopfupisa hupenyu hwavo hwesevhisi.
Kana gasi rechisikigo richida kutonhora kwakadzika, se liquefied natural gasi (LNG) richida kutonhodzwa kusvika -162 degree, hunyoro hwasara hunoomesa nekukuvadza midziyo yakakosha senge cryogenic heat exchangers.
Masefa emorekuru, ane saizi yavo yepore yakafanana, anonyanya kushambadza mamorekuru emvura. Iyo mvura adsorption yakakwira kusvika 22% yehuremu hwavo, iyo inogona kuderedza dova regasi rechisikigo kusvika pazasi -70 dhigirii uye kuwana yakadzika dehydration.
Natural Gasi Kutapira
Gasi remusikirwo kutapira inzira ye desulfurization uye decarbonization. Iyo haidrojeni sulfide uye kabhoni dhaibhorosi mugasi rechisikigo inogona kuumba maasidhi (nemvura), uye kukonzera ngura mumapaipi nemidziyo. Hydrogen sulfide zvakare igasi rine muchetura rinokanganisa hutano nekuchengetedzeka.
Molecular sieve ine chinangwa chekubvisa hydrogen sulfide uye carbon dioxide kuPPM kana kunyange PPB level. Izvi zvinobatsira kuderedza kuora, kuwedzera calorific kukosha, uye kuzadzisa zviyero zvekutengesa zvegasi rechisikigo mumhando uye zvekufambisa.
Kuwedzera kune inorganic sulfur, masieve emamorekuru anogona zvakare kushambadza organic sarufa yakadai semethyl mercaptan, ethyl mercaptan, propyl mercaptan, methyl sulfide, uye thiophene, zvese nekuda kwenzvimbo yavo yakakura chaiyo uye vhoriyamu yepore.
Zeolite Molecular Sieves For Natural Gas Processing
Type 3A zeolite molecular sieve: Hukuru hwayo pore i3Å, uye inonyanya kushandiswa kushambadza mamorekuru emvura ane dhayamita ingangoita 2.8Å. Inogona kubvisa hunyoro kubva kugasi rechisikigo ichidzivirira kudzvova kwemahydrocarbons, ichiita kuti ive yakakodzera kupera kwegasi remvura.
Nyora 4A zeolite molecular sieve: Hukuru hwayo pore i4Å, uye inogona kusarudza adsorb mamorekuru emvura (diameter 2.8Å). Iyo inochengetedza yakakwira adsorption kugona pakupisa kwakanyanya uye yakakodzera kuomeswa kwakadzika kwegasi rechisikigo. Nekudaro, zvinofanirwa kucherechedzwa kuti inogona kushambadzira mamwe ma hydrocarbons akareruka.
Type 5A zeolite molecular sieve: Hukuru hwayo hwepore i5Å, uye hunogona kushandiswa mukugadzira gasi rechisikigo readsorption yemvura, light hydrocarbons, carbon dioxide, hydrogen sulfide, mercury, etc. Semuyenzaniso, kubvisa trace amounts yehydrogen sulfide kubva musanganiswa wemethane necarbon dioxide.
Type 13X zeolite molecular sieve: Iyo pore saizi i10Å, uye ine yakasimba adsorption kugona kwekabhoni dhaidhiyodhi, inogona kunyatso kushambadza sulfur makomisheni akadai sehydrogen sulfide uye mercaptans, kubvisa tsvina yakaita seanorema hydrocarbons uye anonhuwirira hydrocarbons muLNG zvirimwa.