Cov nyhuv ntawm Si-Al piv rau ZSM molecular sieve

Qhov piv ntawm Si/Al (Si/Al piv) yog ib qho tseem ceeb ntawm ZSM molecular sieve, uas qhia txog cov ntsiab lus ntawm Si thiab Al hauv molecular sieve. Qhov piv no muaj qhov cuam tshuam tseem ceeb rau kev ua haujlwm thiab kev xaiv ntawm ZSM molecular sieve.
Ua ntej, qhov piv ntawm Si/Al tuaj yeem cuam tshuam rau qhov acidity ntawm ZSM molecular sieves. Feem ntau, qhov piv ntawm Si-Al siab dua, qhov acidity ntawm molecular sieve muaj zog dua. Qhov no yog vim tias txhuas tuaj yeem muab qhov chaw acidic ntxiv rau hauv molecular sieve, thaum silicon feem ntau txiav txim siab cov qauv thiab cov duab ntawm molecular sieve.
Yog li ntawd, qhov acidity thiab catalytic activity ntawm molecular sieve tuaj yeem tswj tau los ntawm kev kho qhov piv ntawm Si-Al. Qhov thib ob, qhov piv ntawm Si/Al kuj tseem tuaj yeem cuam tshuam rau qhov ruaj khov thiab kev tiv taus cua sov ntawm ZSM molecular sieve.
Cov molecular sieves synthesized ntawm Si / Al piv siab dua feem ntau muaj kev ruaj khov thermal thiab hydrothermal zoo dua.
Qhov no yog vim tias silicon hauv molecular sieve tuaj yeem muab kev ruaj khov ntxiv, tiv taus cov tshuaj tiv thaiv xws li pyrolysis thiab acid hydrolysis. Tsis tas li ntawd, qhov sib piv Si/Al kuj tseem tuaj yeem cuam tshuam rau qhov loj me thiab cov duab ntawm ZSM molecular sieves.
Feem ntau, qhov siab dua ntawm Si-Al piv, qhov me dua qhov pore loj ntawm lub molecular sieve, thiab cov duab ze rau lub voj voog. Qhov no yog vim tias txhuas tuaj yeem muab cov ntsiab lus txuas ntxiv hauv lub molecular sieve, ua rau cov qauv siv lead ua kom me dua. Hauv kev xaus, qhov cuam tshuam ntawm Si-Al piv rau ZSM molecular sieve yog ntau yam.
Los ntawm kev kho qhov sib piv Si-Al, cov molecular sieves nrog cov qhov loj me thiab cov duab tshwj xeeb, cov kua qaub zoo thiab kev ruaj khov tuaj yeem tsim tau, yog li kom ua tau raws li qhov xav tau ntawm ntau yam kev tshuaj tiv thaiv catalytic.