Sepiolite yog ib hom pob zeb uas muaj cov fiber ntau, uas yog cov qauv fiber txuas ntxiv mus los ntawm phab ntsa polyhedral pore thiab pore channel. Cov qauv fiber muaj cov qauv txheej txheem, uas yog tsim los ntawm ob txheej ntawm Si-O-Si daim ntawv cog lus txuas nrog silicon oxide tetrahedron thiab octahedron uas muaj magnesium oxide hauv nruab nrab, tsim 0.36 nm × 1.06nm honeycomb pore. Sepiolite daim ntawv thov kev lag luam feem ntau xav tausepiolite sib tsoo zeb hmoov kom raug zom ua hmoov sepiolite. HCMilling (Guilin Hongcheng) yog cov chaw tsim khoom tshaj lij ntawm sepiolite sib tsoo zebTag nrho cov khoom siv ntawm peb sepiolite sib tsoo zeb Cov kab ntau lawm tau siv dav hauv kev ua lag luam. Txais tos kom kawm paub ntau ntxiv hauv online. Cov hauv qab no yog kev qhia txog kev siv cov hmoov sepiolite:
1. Cov khoom ntawm sepiolite
(1) Cov khoom adsorption ntawm sepiolite
Sepiolite yog ib qho qauv tshwj xeeb peb-seem nrog thaj chaw loj thiab cov porosity txheej, uas yog grafted los ntawm SiO2 tetrahedron thiab Mg-O octahedron. Kuj tseem muaj ntau cov kua qaub [SiO4] alkaline [MgO6] chaw ntawm nws qhov chaw, yog li sepiolite muaj kev ua tau zoo adsorption.
Cov qauv siv lead ua Sepiolite muaj peb qhov chaw sib txawv ntawm kev nqus dej:
Thawj yog O atom hauv Si-O tetrahedron;
Qhov thib ob yog cov dej molecules uas sib koom tes nrog Mg2 + ntawm ntug ntawm Mg-O octahedron, feem ntau tsim cov hydrogen bonds nrog lwm yam tshuaj;
Qhov thib peb yog Si OH kev sib txuas ua ke, uas yog tsim los ntawm kev tawg ntawm silicon oxygen bond hauv SiO2 tetrahedron thiab tau txais proton lossis hydrocarbon molecule los them rau qhov tsis muaj peev xwm. Si OH bond hauv sepiolite tuaj yeem cuam tshuam nrog cov molecules adsorbed ntawm nws qhov chaw kom txhawb nqa adsorption, thiab tuaj yeem tsim cov kev sib txuas nrog cov organic.
(2) Kev ruaj khov ntawm sepiolite
Sepiolite yog cov khoom siv av nplaum inorganic uas ruaj khov thiab tiv taus kub. Thaum lub sijhawm ua kom sov maj mam los ntawm qhov kub qis mus rau qhov kub siab, cov qauv siv lead ua ntawm sepiolite tau dhau los ntawm plaub theem poob phaus:
Thaum qhov kub sab nraud nce mus txog li 100 ℃, cov dej molecules uas sepiolite yuav poob rau hauv thawj theem yog zeolite dej hauv cov pores, thiab qhov poob ntawm qhov no ntawm cov dej molecules ncav cuag li 11% ntawm tag nrho qhov hnyav ntawm sepiolite.
Thaum qhov kub sab nraud nce mus txog 130 ℃ txog 300 ℃, sepiolite nyob rau theem ob yuav poob thawj feem ntawm cov dej sib koom ua ke nrog Mg2 +, uas yog li 3% ntawm nws qhov hnyav.
Thaum qhov kub sab nraud nce mus txog 300 ℃ txog 500 ℃, sepiolite nyob rau theem peb yuav poob qhov thib ob ntawm kev sib koom tes dej nrog Mg2 +.
Thaum qhov kub sab nraud nce mus txog 500 ℃, cov dej hauv paus (- OH) ua ke nrog octahedron sab hauv yuav ploj mus rau theem plaub. Cov qauv fiber ntawm sepiolite hauv theem no tau raug rhuav tshem tag nrho, yog li cov txheej txheem no tsis tuaj yeem rov qab tau.
(3) Kev tiv thaiv corrosion ntawm sepiolite
Sepiolite ntuj tsim muaj kev tiv taus kua qaub thiab alkali zoo. Thaum nws nyob hauv nruab nrab nrog pH tus nqi ntawm cov kua <3 lossis> 10, cov qauv sab hauv ntawm sepiolite yuav raug xeb. Thaum nws nyob nruab nrab ntawm 3-10, sepiolite qhia tau tias muaj kev ruaj khov zoo. Nws qhia tau tias sepiolite muaj kev tiv taus kua qaub thiab alkali muaj zog, uas yog ib qho laj thawj tseem ceeb vim li cas sepiolite siv ua lub hauv paus inorganic los npaj Maya zoo li xim xiav.
(4) Cov khoom siv catalytic ntawm sepiolite
Sepiolite yog ib qho khoom siv catalyst pheej yig thiab siv tau zoo heev. Qhov laj thawj tseem ceeb yog tias sepiolite tuaj yeem tau txais thaj chaw tshwj xeeb dua thiab nws cov qauv porous tom qab hloov kho acid, uas yog cov xwm txheej zoo rau kev siv sepiolite ua tus catalyst carrier. Sepiolite tuaj yeem siv ua tus cab kuj los tsim ib qho photocatalyst nrog kev ua tau zoo heev catalytic nrog TiO2, uas yog siv dav hauv hydrogenation, oxidation, denitrification, desulfurization, thiab lwm yam.
(5) Kev pauv ion ntawm sepiolite
Txoj kev pauv ion siv lwm cov hlau cations nrog cov polarization muaj zog dua los hloov Mg2 + ntawm qhov kawg ntawm octahedron hauv sepiolite qauv, yog li hloov nws cov txheej spacing thiab nto acidity, thiab txhim kho kev ua tau zoo ntawm sepiolite. Cov hlau ions ntawm sepiolite yog dominated los ntawm magnesium ions, nrog rau me me ntawm txhuas ions thiab me me ntawm lwm yam cations. Cov khoom tshwj xeeb thiab cov qauv ntawm sepiolite ua rau nws yooj yim rau cations hauv nws cov qauv los pauv nrog lwm yam cations.
(6) Cov khoom rheological ntawm sepiolite
Sepiolite nws tus kheej yog ib daim duab me me, tab sis feem ntau ntawm lawv tau muab sib sau ua ke nrog cov pob khoom tsis sib xws. Thaum sepiolite yaj rau hauv dej lossis lwm cov kuab tshuaj polar, cov pob khoom no yuav tawg sai sai thiab sib xyaw ua ke los tsim cov fiber network uas muaj cov kuab tshuaj tsis sib xws. Cov qauv network no tsim cov tshuaj uas muaj zog rheology thiab viscosity siab, qhia txog cov khoom rheological tshwj xeeb ntawm sepiolite.
Tsis tas li ntawd xwb, sepiolite kuj muaj cov yam ntxwv ntawm kev rwb thaiv tsev, kev tshem tawm xim, kev tiv thaiv hluav taws thiab kev nthuav dav, uas muaj txiaj ntsig zoo rau kev siv hauv kev lag luam.
2. Cov Ntawv Thov Tseem Ceeb ntawm Sepiolitecov txheej txheem hmoov los ntawmSepiolitelub tshuab sib tsoo
Nrog rau kev loj hlob sai ntawm Tuam Tshoj txoj kev lag luam, kev xav tau ntawm kev ua lag luam rau cov khoom siv uas tsis ua rau ib puag ncig puas tsuaj, cov khoom muaj nqis ntxiv tau loj hlob tuaj. Sepiolite yog ib hom khoom siv inorganic uas muaj kev ruaj khov zoo vim nws cov qauv siv lead ua tshwj xeeb, uas tsis muaj kuab paug, tsis ua rau ib puag ncig puas tsuaj thiab pheej yig. Tom qab ua tiav los ntawm lub tshuab sib tsoo sepiolite, nws tuaj yeem siv dav hauv ntau qhov chaw lag luam, xws li kev tsim vaj tsev, kev siv tshuab ceramic, kev npaj catalyst, kev tsim cov xim, kev ua kom roj av rov qab, kev tiv thaiv ib puag ncig, yas, thiab lwm yam, uas muaj kev cuam tshuam loj heev rau kev txhim kho kev lag luam hauv Tuam Tshoj. Tib lub sijhawm, tib neeg tau pib them sai dua rau kev siv tshiab thiab kev tsim kho thev naus laus zis ntawm sepiolite, thiab ua kom nrawm dua kev tsim kho ntawm cov saw hlau kev lag luam sepiolite kom daws tau qhov tsis txaus ntawm sepiolite hauv kev ua lag luam. Cov khoom lag luam qis.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-28-2022
