Linear uye branched parafini inogona kupatsanurwa ne zeolite molecular sieve. Maparafini ane mashandisirwo akasiyana uye maitiro mupetrochemicals uye pasi pemvura yakanaka makemikari, uye kupatsanurwa kwemutsara uye matavi parafini inogona kuwana yakakwira maindasitiri ekushandisa zvakanaka uye hupfumi.
Sei Kuparadzanisa Linear uye Branched Paraffins?
Maparafini emutsetse (anozivikanwawo semaalkanes akajairwa kana kuti n-parafini) neparafini ane matavi (anonziwo isomeric alkanes kana-parafini) zvinhu zvakakosha muindasitiri yepetrochemical, uye kupatsanurwa kwazvo kwakakosha pakugadzirwa kwemafuta emhando yepamusoro uye kemikari yakabikwa.
Pamaparafini ane mitsetse, ane mapoinzi epamusoro uye ane octane yakaderera (anti-explosion performance). Iwo akanyatsokodzera semakemikari mbishi zvinhu, sekupaza kugadzira ethylene uye propylene, synthesizing surfactants, kugadzirira akajairwa alkane solvents uye akakosha makemikari, nezvimwe.
Kune maparafini ane matavi, ane mapoinzi akadzika ekubikira, nhamba dzepamusoro dzeoctane, uye kuwedzera kwakazara kupisa. Iwo akanyanya kukodzera semafuta emafuta, senge peturu kusanganisa kuwedzera octane nhamba, aviation mafuta, uye yakachena mafuta, nezvimwe.
Nzira yekuparadzanisa Linear uye Branched Paraffins?
Sezvinozivikanwa, madhayamita akakosha emutsetse weparafini mamorekuru ane 4.9 angstroms, nepo madhayamita eparafini ane branched akakura kupfuura 5 angstroms. Saka isu tinogona kushandisa iyo steric mhedzisiro yemhando 5A zeolite molecular sieves kuparadzanisa mutsara uye branched parafini.
Maparafini emazuva ese (senge n-butane uye n-hexane) ane mitsara yakatsetseka uye madiki uye matete mukukura, saka anogona kupinda mumapores emhando 5A molecular sieve. Uye maparafini eisomeric (akadai seiso-butane neiso-hexane) ane zvimiro zvine matavi, mavhoriyamu mahombe kana maumbirwo asina kurongeka, uye haakwanise kupinda mumaburi emhando 5A molecular sieve.
Kana mamorekuru eparafini achipinda mumasefa emamolecular, maparafini akajairwa anoshambadzwa ne5A molecular sieves; isomeric parafini haigoni kupinda mu pores uye inoramba iri mugasi kana mvura chikamu. Nenzira iyi, parafini yakajairika uye isomeric parafini inogona kuparadzaniswa ne5A molecular sieves.
Masefa eMolecular Ekuparadzanisa Linear Uye Branched Paraffins
Zviripachena, nyora 5A zeolite molecular sieve yakanakira kupatsanura linear uye branched parafini. Saizi yepore ye5A molecular sieve inongoita 5 angstroms. Nekuda kwehukuru hwavo hukuru uye yakakwirira steric chipingamupinyi, branched parafini haigoni kupinda pores ye5A molecular sieve uye nokudaro haizoshambadzirwe.
Uchishandisa mhando 5A zeolite molecular sieve kupatsanura linear uye branched paraffins, inogona kuburitsa yakanyanya kuchena linear parafini feedstocks (senge n-pentane uye n-hexane) uye zvakare kunatsiridza isomerization selectivity.