Kev sib xyaw ntawm Cov Catalyst

Feem ntau cov catalysts muaj peb yam sib txawv: cov khoom siv, cov cab kuj, thiab cocatalyst.

1. Cov khoom xyaw nquag

Lub active tivthaiv yog lub ntsiab tivthaiv ntawm cov catalyst, qee zaum muaj ib yam khoom, qee zaum muaj ntau yam khoom.

2. Cov cab kuj

Cov cab kuj yog ib qho dispersant, binder los yog kev txhawb nqa rau cov catalytically active Cheebtsam, thiab yog ib lub moj khaum rau kev txhawb nqa lub active Cheebtsam. Lub catalyst npaj los ntawm kev txhawb nqa cov khoom nquag thiab cov co-catalyst tivthaiv ntawm cov cab kuj dhau los ua cov catalyst txhawb nqa.

Cov khoom siv feem ntau siv: tsawg qhov chaw nto: corundum, silicon carbide, pumice, diatomite, asbestos, refractory cib; Qhov tshwj xeeb ntawm thaj chaw: alumina, SiO2-Al2O3, bauxite, av nplaum, magnesium oxide, silica gel, activated carbon.

3. Co-cov catalyst

Cocatalysts yog ib qho me me ntawm cov tshuaj ntxiv rau cov catalyst thiab yog cov koom haum pabcuam ntawm cov catalyst. Lawv tsis muaj kev ua si lossis kev ua haujlwm me me, tab sis tom qab lawv ntxiv rau cov catalyst, lawv tuaj yeem hloov cov tshuaj muaj pes tsawg leeg, cov qauv tshuaj, ion valence, acid-piv lub xeev ntawm cov catalyst. khoom, lattice qauv, nto qauv, pore qauv, dispersion xeev, mechanical zog, thiab lwm yam, yog li txhim kho cov kev ua ub no, selectivity, stability thiab lub neej ntawm catalyst.