Ukusetyenziswa kunye nokuhlanganiswa kwe-ZSM-5 ye-molecular sieve

I. Intshayelelo

I-ZSM-5 i-molecular sieve luhlobo lwezinto ezincinci ezinokwakheka okungaqhelekanga, eziye zasetyenziswa ngokubanzi kwiindawo ezininzi ngenxa yeempawu zayo ezintle ze-adsorption, ukuzinza kunye nomsebenzi we-catalytic. Kweli phepha, ukusetyenziswa kunye nokuhlanganiswa kwe-ZSM-5 ye-molecular sieve iya kwaziswa ngokubanzi.

Okwesibini, ukusetyenziswa kwe-ZSM-5 ye-molecular sieve

1. I-Catalyst: Ngenxa ye-acidity ephezulu kunye nesakhiwo esiyingqayizivele se-pore ye-ZSM-5 ye-molecular sieve, ibe yinto ebalaseleyo yokuvuselela iikhemikhali ezininzi, ezifana ne-isomerization, i-alkylation, i-dehydration, njl.
2. I-Adsorbent: I-ZSM-5 i-molecular sieve inomthamo omkhulu we-pore kunye nokusebenza kakuhle kwe-adsorption, kwaye isetyenziswa ngokubanzi ekuhlukaneni kwegesi, ukuhlukana kolwelo kunye ne-catalyst carrier kunye nezinye iinkalo.
3. I-Catalyst carrier: ingasetyenziselwa njenge-catalyst carrier ukuphucula umsebenzi kunye nokuzinza kwe-catalyst.

Ukuhlanganiswa kwe-ZSM-5 ye-molecular sieve

I-synthesis ye-ZSM-5 ye-molecular sieve idla ngokuthatha indlela yetemplate, elawula inkqubo yokudibanisa ngokulawula ubushushu, uxinzelelo, umlinganiselo wezinto eziluhlaza kunye nezinye iimeko. Phakathi kwazo, ezona zinto ziqhele ukusetyenziswa ekrwada yi-sodium silicate kunye ne-sodium aluminate.

1. Ukulawulwa kwe-silica-aluminium ratio: i-silica-aluminium ratio yenye yeeparitha ezibalulekileyo ze-ZSM-5 ze-molecular sieve, ezinokulawulwa ngokulungelelanisa umlinganiselo we-sodium silicate kunye ne-sodium aluminate. Ukuphakama komlinganiselo we-silicon ukuya kwi-aluminiyam, ngakumbi ukuthambekela kwesakhelo se-molecular sieve eyenziwe yi-silicon, kwaye ngokuphambeneyo.
2. Ubushushu be-Synthesis kunye noxinzelelo: ukushisa kwe-synthesis kunye noxinzelelo zizinto ezibalulekileyo ezichaphazela ukubunjwa kwe-ZSM-5 ye-molecular sieve. Ngokuqhelekileyo, amaqondo okushisa aphezulu kunye neengcinezelo zihambelana nokubunjwa kwe-ZSM-5 ye-molecular sieves.
3. Ixesha le-Crystallization kunye nokushisa kwe-crystallization: ixesha le-crystallization kunye nokushisa kwe-crystallization zizinto ezibalulekileyo ezichaphazela isakhiwo se-ZSM-5 ye-molecular sieve. Izinga lokubunjwa kunye nokucoceka kwe-ZSM-5 ye-molecular sieve yaphuculwa ngokunyusa ukushisa kwe-crystallization ngexesha elifanelekileyo le-crystallization.
4. Abancedisi be-Synthetic: Ngamanye amaxesha ukwenzela ukulungelelanisa ixabiso le-pH okanye ukukhuthaza inkqubo ye-crystallization, kuyimfuneko ukongeza ezinye izinto ezincedisayo zokwenziwa, ezifana ne-NaOH, NH4OH, njl.

Iv. Ukuqukumbela

Njengezinto ezibalulekileyo ze-microporous, i-ZSM-5 i-molecular sieve inethuba elibanzi lokusebenzisa. Kubalulekile ukuqonda indlela yokudibanisa kwisicelo sayo esibanzi. Ngokulawula iimeko ze-synthesis, isakhiwo se-pore, i-acidity kunye neempawu ze-catalytic ze-ZSM-5 i-molecular sieve inokulawulwa ngokufanelekileyo, enika amathuba amaninzi okusetyenziswa kwayo kwiinkalo ezahlukeneyo.