Kev siv cov hlau oxide magnetite hmoov

Kev siv cov hmoov sib nqus

Ntuj magnetite Fe3O4 siv rau roj drilling kua thiab roj-puag av nkos

Hom magnetite tuaj yeem siv dav rau cov dej drilling, nrog rau cov dej tshiab, dej hiav txwv thiab roj av av. Nws tuaj yeem siv los nce

Qhov ceev ntawm tag nrho cov drilling thiab ua tiav kua rau 25 lb / gal (3.0 sg). nws yog feem ntau siv nyob rau hauv high-density, oil-base av nkos.

Cov kua nplaum uas hnyav nrog cov hlau nplaum no muaj cov khib nyiab tsawg dua los ntawm qhov ntim ntau dua li cov hnyav nrog barite, ua rau cov av nkos hnyav dua.

ua tau. Nws yog tshwj xeeb tshaj yog pab tau nyob rau hauv high-density tua kua.

hlau-oxide magnetite siv rau cov roj drilling tshem tawm ntawm sulfides thiab hnyav tus neeg sawv cev

Hauv kev drilling rau cov roj av, cov av nkos feem ntau yog siv los ua cov kua dej drilling. Feem ntau ua los ntawm kev siv cov khoom sib txuas xws li barite thiab bentonite av nplaum kom them tau lubricity zoo, kev tshawb fawb tau saib rau lwm cov ntaub ntawv uas yuav muaj txiaj ntsig thiab / lossis pheej yig dua - tab sis qhov tseem ceeb tshaj yog ua siab ntev rau kev kub siab, kub drilling txheej txheem niaj hnub no. Feem ntau rau cov ntawv thov no, cov khoom siv denser yog siv; ib qho av nkos nrog lub ntiajteb txawj nqus ntau dua. Barite tuaj yeem hloov nrog cov hlau nplaum hauv 1: 1 zam thiab siv tau zoo. Kev tshawb fawb pom tau tias qhov ceev tuaj yeem nce los ntawm 14.5 mus rau 14.9 ppg (piv txwv li qhov ceev dua nrog cov khoom qis dua, txo cov nqi). Lub tiaj tus rheology tau pom thiab pom zoo dua viscosity-elasticity profile, lub ntsiab lus zoo dua kev ntxuav ntawm qhov hauv cov khoom siv drilling. Cov khoom pom tau kuj tau txhim kho piv rau barite, nrog ze li ntawm 30% tsawg lim ntim thiab 16% qhov hnyav dua. Magnetite kuj tseem siv tau rau hauv daim ntawv nanoparticle rau cov khoom siv drilling, nrog rau kev ntxhov siab thiab kub muaj kev sib raug zoo. Tsis tas li ntawd, hauv cov roj thiab roj drilling, magnetite tuaj yeem pab tshem tawm sulfides. Nyob rau hauv cov hlab ntsha zoo sib xws rau qhov ntom ntom txhawb cov khoom hauv dej raws cov av nkos, magnetite tuaj yeem siv tau los ua tus neeg saib xyuas qhov hnyav hauv cov cementing ntawm qhov dej extraction.

hlau-oxide Fe3O4 magnetite siv rau catalysis ntawm ammonia thiab hydrocarbons

Qhov zoo tshaj plaws-paub daim ntawv thov ntawm magnetite dub xuab zeb yog nyob rau hauv industrial scale synthesis ntawm ammonia los ntawm cov txheej txheem Haber-Bosch (HB). Cov txheej txheem HB tsim cov ammonia los ntawm kev hloov pauv atmospheric nitrogen nrog hydrogen nyob rau hauv qhov kub thiab txias, ua hauj lwm ib tug heterogeneous hlau catalyst. Magnetite yog thawj qhov khoom siv rau qhov no. Hauv av magnetite yog ib feem txo qis, txo nws ntawm qee qhov ntawm nws cov pa, tawm hauv cov catalyst bearing ib tug magnetite core nrog lub plhaub sab nraud ntawm ferrous oxide (FeO, würstite). Qhov kom zoo dua ntawm no catalyst tuaj nyob rau hauv nws porosity, thiab yog li nws yog ib tug heev active, siab saum npoo av. Ammonia yog cov khoom siv tshuaj lom neeg loj thiab yog ib feem tseem ceeb hauv kev tsim cov chiv, thiab kev siv cov hlau nplaum hauv HB muab cov khoom siv pheej yig thiab txhim khu kev qha rau cov txheej txheem tseem ceeb hauv ntiaj teb no.

Fe3O4 magnetite siv rau kev lim dej thiab kev kho dej

Magnetite yog ib txwm tshwm sim hlau-oxide ntxhia nrog cov ntawv thov hauv ntau qhov kev lag luam, Ib qho kev siv yog nyob rau hauv dej purification: nyob rau hauv high gradient sib nqus sib nqus, magnetite nanoparticles nkag mus rau hauv cov dej tsis huv yuav khi rau cov khoom raug tshem tawm (khoom, kab mob, lossis plankton, piv txwv li. ) thiab khom rau hauv qab ntawm cov kua dej, tso cai rau cov khoom paug tawm thiab cov khoom siv hlau nplaum tuaj yeem rov ua dua thiab rov siv dua.

Magnetite tau ua haujlwm ntau hauv kev ua dej huv thiab tau tsim rau hauv polymeric microspheres nrog rau styrene thiab divinylbenzene los tsim cov khoom sib nqus ion-exchange resins, uas qhia tau hais tias muaj txiaj ntsig zoo ntawm kev tshem tawm cov tshuaj lom cobalt thiab nitrate los ntawm dej. Hauv cov nroj tsuag hauv tebchaws Australia, micron-scale magnetite tau siv los ua cov tshuaj reagent hauv kev ua kom huv thiab ua kom pom tseeb ntawm cov dej, tsim cov khoom siv los ntawm cov av tsis zoo thiab cov dej saum npoo av. Cov teeb meem hais txog 'loaded' reagent ua nyuaj rau tshem tawm tau daws los ntawm qhov sib nqus hlau nplaum. Chlorinated hydrocarbons tuaj yeem raug tshem tawm ntawm dej los ntawm cov kab mob uas tau raug adsorbed mus rau magnetite, uas tuaj yeem raug tshem tawm los ntawm kev sib nqus.

Nyob rau hauv cov nqe lus ntawm cov txheej txheem pom zoo tshaj plaws rau cov dej uas muaj kab mob ntau tshaj plaws, magnetite feem ntau siv nrog rau lwm cov tebchaw. Tag nrho cov organic carbon residues tuaj yeem raug txo los ntawm yuav luag ob feem peb hauv cov kua qaub pov tseg hauv ob xuab moos los ntawm kev muaj cov magnetite ua co-catalyst nrog rau cov pa hlau oxide, ntawm qhov kub thiab txias. Tsis tas li ntawd, thaum ua ke nrog cov tshuaj sib xyaw hematite, magnetite tuaj yeem cuam tshuam qhov kev tshem tawm ntawm 75% ntawm cov organic carbon residues hauv cov nroj tsuag cov dej khib nyiab, nrog rau cov txiaj ntsig ntxiv ntawm yuav luag tag nrho tshem tawm cov kab mob nitrogen ib yam nkaus.

Kev siv cov hlau nplaum ntxiv hauv cov ntawv thov pom muaj xws li tshem tawm hexavalent uranium los ntawm cov av thaum nrog cov hlau txo cov kab mob Ochrobactrum, qhov uas muaj cov magnetite tau pom los pab cov immobilisation ntawm uranium - nrog kev tshem tawm tsawg dua qhia tsis muaj magnetite tam sim no. Magnetite tau pom tias yuav pab tau qhov anaerobic digestion ntawm cov dej khib nyiab.

Hlau-oxide Fe3O4 magnetite siv rau Kev Siv Tshuaj

Magnetite tau pom dav siv hauv thaj chaw tshuaj. DNA tau pom tias tau muab rho tawm los ntawm cov noob pob kws vie siv cov hlau nplaum thiab cov hlau nplaum-silica sib xyaw, ob qho tib si ua tau zoo dua li cov khoom lag luam DNA rho tawm. Cov extraction siv magnetite dub oxide yog siab yielding thiab ua rau extracts uas haum rau siv nyob rau hauv enzyme digestion thiab lub polymerase saw cov tshuaj tiv thaiv txheej txheem. 5 micron nplai magnetite hmoov tau siv los ua cov xim hauv cov xim gelatine rau kev soj ntsuam ntawm kev ua haujlwm proteolytic - kev tawg ntawm cov proteins rau hauv me me polypeptides thiab / lossis amino acid

Sib Nqus Resonance Imaging (MRI) cov neeg ua haujlwm sib txawv feem ntau tau tshaj tawm raws li kev siv tau zoo rau cov hlau nplaum vim lawv cov khoom superparamagnetic - lawv dhau los ua cov hlau nplaum hauv lub zog sib nqus ntawm MRI ntsuas, tab sis xoob cov hlau nplaum no thaum lub teb tsis siv lawm, thiab yog ntes tau heev.

hlau-oxide Fe3O4 magnetite siv rau kev siv zog

Whilst magnetite tau qhia nws lub peev xwm hauv fossil fuel extraction, muaj qee qhov piv txwv ntawm nws nrhiav kev siv los tsim lub zog siv tau zoo dua. Hauv cov roj hluav taws xob microbial, cov roj siv tau yog tsim thaum hluav taws xob dhau los ntawm cov kab mob tshwj xeeb uas nplua nuj electrolyte, zoo ib yam li hydrogen yog tsim los ntawm electrolysis. Nws tau pom tias magnetite ntxiv rau qhov zoo li no muaj kev ua tau zoo heev rau cov kauj ruam thauj oxygen, ua rau tag nrho cov kev ua haujlwm zoo dua qub. Tsis tas li ntawd, cov hlau nplaum tam sim no tseem siv tau los tshem tawm cov dej phwj tuaj - yog tias lub kaw lus siv cov dej tsis huv. Magnetite immobilized lipases tau pom tias muaj txiaj ntsig zoo ntawm cov roj biodiesel, ib yam li lwm cov lipases. Txawm li cas los xij, cov kab mob fungal thiab non-probiotic qhov chaw ntawm lipases cuam tshuam nrog cov khoom lag luam tsis zoo, thaum probiotic lipases tsis paub txog lawv qhov kev ruaj ntseg thiab yog li kev ua tau zoo piv rau lawv cov fungal counterparts. Lub immobilization ntawm cov probiotic lipases ntawm magnetite ua rau lub cev ua tau zoo.