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Kev sib tham theoretical ntawm aerosol stability test induced by Arrhenius formula

Kev sib tham theoretical ntawm aerosol stability test induced by Arrhenius formula

Cov txheej txheem tsim nyog rau peb cov khoom lag luam aerosol yuav tsum tau pib yog ua qhov kev ntsuam xyuas kev ruaj ntseg, tab sis peb yuav pom tias txawm tias qhov kev ntsuam xyuas kev ruaj ntseg tau dhau los, tseem yuav muaj qhov sib txawv ntawm kev xeb hauv cov khoom loj, lossis txawm tias cov khoom lag luam muaj teeb meem loj.Yog li nws puas tseem muaj txiaj ntsig rau peb ua qhov ntsuas kev ruaj ntseg?
Peb feem ntau tham txog 50 ℃ peb lub hlis ntawm kev ntsuas kev ruaj ntseg yog sib npaug rau ob xyoos ntawm kev ntsuas kev ntsuas ntawm chav sov, yog li tus nqi theoretical tuaj qhov twg?Cov mis tseem ceeb yuav tsum tau hais ntawm no: Arrhenius formula.Arrhenius equation yog ib lo lus tshuaj.Nws yog ib qho empirical formula ntawm kev sib raug zoo ntawm tus nqi tas li ntawm cov tshuaj tiv thaiv thiab kub.Ntau qhov kev xyaum qhia tau hais tias cov qauv no tsis yog tsuas yog siv tau rau cov tshuaj tiv thaiv roj, cov tshuaj tiv thaiv kua theem thiab feem ntau ntawm cov tshuaj tiv thaiv multiphase catalytic.
Formula sau (exponential)

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K yog tus nqi tas mus li, R yog cov roj molar tsis tu ncua, T yog qhov ntsuas kub ntawm qhov ntsuas kub, Ea yog lub zog ua kom pom tseeb, thiab A yog qhov ua ntej exponential (tseem hu ua qhov feem ntau zaus).

Nws yuav tsum raug sau tseg tias Arrhenius 'empirical formula xav tias lub zog ua kom Ea raug suav hais tias yog qhov tsis muaj kev ywj pheej ntawm qhov kub thiab txias, uas zoo ib yam nrog cov txiaj ntsig kev sim hauv qee qhov ntsuas kub.Txawm li cas los xij, vim muaj qhov kub thiab txias ntau lossis cov tshuaj tiv thaiv nyuaj, LNK thiab 1 / T tsis yog txoj kab ncaj nraim.Nws qhia tau hais tias lub zog ua kom muaj feem xyuam rau qhov kub thiab txias thiab Arrhenius empirical mis tsis muaj feem xyuam rau qee qhov kev cuam tshuam.

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Peb puas tuaj yeem ua raws li Arrhenius 'cov qauv qhia pom hauv aerosols?Nyob ntawm qhov xwm txheej, feem ntau ntawm lawv tau ua raws, nrog qee qhov kev zam, muab, ntawm chav kawm, tias "kev ua kom lub zog Ea" ntawm cov khoom siv aerosol yog qhov ruaj khov tsis tu ncua ntawm qhov kub thiab txias.
Raws li Arrhenius equation, nws cov tshuaj muaj feem cuam tshuam nrog cov hauv qab no:
(1) Kev kub siab: rau cov tshuaj tiv thaiv uas muaj roj, thaum lwm yam kev mob tseem tsis hloov pauv (tshwj tsis yog ntim), nce siab, uas yog, lub ntim txo, qhov concentration ntawm reactants nce, tus naj npawb ntawm activated molecules ib chav tsev ntim nce, tus naj npawb ntawm reactants. kev sib tsoo zoo rau ib chav tsev nce, thiab cov tshuaj tiv thaiv nrawm nrawm;Txwv tsis pub, nws txo qis.Yog tias qhov ntim tsis tas li, tus nqi ntawm cov tshuaj tiv thaiv tseem nyob tas li ntawm lub siab (los ntawm kev ntxiv cov roj uas tsis koom nrog cov tshuaj tiv thaiv).Vim tias qhov concentration tsis hloov, tus naj npawb ntawm cov active molecules ib ntim tsis hloov.Tab sis ntawm qhov ntim tas li, yog tias koj ntxiv cov reactants, dua, koj siv lub siab, thiab koj nce qhov concentration ntawm reactants, koj nce tus nqi.
(2) Kub: ntev npaum li qhov ntsuas kub nce, cov reactant molecules nce lub zog, yog li ntawd ib feem ntawm cov qub qis zog molecules ua activated molecules, nce qhov feem pua ​​​​ntawm activated molecules, nce tus naj npawb ntawm kev sib tsoo zoo, kom cov tshuaj tiv thaiv. tus nqi nce (qhov laj thawj tseem ceeb).Ntawm chav kawm, vim qhov kub thiab txias, tus nqi ntawm molecular zog yog ceev, thiab tus naj npawb ntawm molecular collisions ntawm reactants ib chav tsev lub sij hawm yog nce, thiab cov tshuaj tiv thaiv yuav accelerated raws li (thib ob ua rau).
(3) Catalyst: kev siv cov catalyst zoo tuaj yeem txo lub zog xav tau rau cov tshuaj tiv thaiv, kom ntau reactant molecules los ua cov molecules activated, zoo heev txhim kho feem pua ​​ntawm reactant molecules ib chav tsev ntim, yog li nce tus nqi ntawm reactants ntau txhiab zaus.Tsis zoo catalyst yog qhov opposite.
(4) Concentration: Thaum lwm yam xwm txheej zoo ib yam, ua kom cov concentration ntawm reactants nce tus naj npawb ntawm cov tshuab ua kom muaj zog hauv ib chav tsev ntim, yog li ua kom muaj kev sib tsoo zoo, cov tshuaj tiv thaiv nce ntxiv, tab sis feem pua ​​​​ntawm cov khoom siv hluav taws xob tsis hloov pauv.
Cov tshuaj lom neeg los ntawm plaub yam saum toj no tuaj yeem piav qhia peb qhov kev faib tawm ntawm qhov chaw corrosion (gas theem corrosion, kua theem corrosion thiab interface corrosion):
1) Nyob rau hauv roj theem corrosion, txawm hais tias lub ntim tseem tsis hloov, lub siab nce.Raws li qhov kub thiab txias, qhov ua kom huab cua (oxygen), dej thiab lub zog nce, thiab cov kev sib tsoo nce, yog li cov roj theem corrosion yog intensified.Yog li ntawd, kev xaiv cov dej-raws li cov pa roj theem rust inhibitor yog qhov tseem ceeb heev
2) cov kua theem corrosion, vim qhov ua kom muaj zog ntxiv, qee qhov impurities tuaj yeem (xws li hydrogen ions, thiab lwm yam) hauv qhov sib txuas tsis muaj zog thiab ntim cov ntaub ntawv nrawm nrawm ua kom muaj corrosion, yog li kev xaiv cov kua theem antirust yuav tsum tau ua tib zoo xav. ua ke nrog pH thiab raw khoom.
3) Interface corrosion, ua ke nrog siab, activation catalysis, huab cua (oxygen), dej, propellant, impurities (xws li hydrogen ions, thiab lwm yam) cov tshuaj tiv thaiv, uas ua rau muaj kev cuam tshuam kev cuam tshuam, kev ruaj ntseg thiab kev tsim cov qauv txheej txheem yog qhov tseem ceeb heev. .

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Rov qab mus rau lo lus nug dhau los, vim li cas qee zaum qhov kev ntsuas kev ruaj ntseg ua haujlwm, tab sis tseem muaj qhov tsis txaus ntseeg thaum nws los txog rau ntau lawm?Xav txog cov hauv qab no:
1: kev ruaj ntseg tsim qauv, xws li kev hloov pauv Ph, emulsification stability, saturation stability thiab lwm yam
2: impurities nyob rau hauv cov khoom raw, xws li kev hloov hauv hydrogen ions thiab chloride ions
3: batch stability ntawm raw cov ntaub ntawv, ph ntawm batch ntawm raw cov ntaub ntawv, cov ntsiab lus sib txawv loj thiab hais txog
4: kev ruaj ntseg ntawm cov kaus poom aerosol thiab li qub thiab lwm cov ntaub ntawv ntim, kev ruaj ntseg ntawm cov tuab ntawm tin plating txheej, kev hloov cov khoom siv los ntawm cov nqi nce ntawm cov khoom raw.
5: Ua tib zoo tshuaj xyuas txhua qhov tsis txaus ntseeg hauv kev ntsuas kev ruaj ntseg, txawm tias nws yog qhov hloov pauv me me, ua qhov kev txiav txim siab tsim nyog los ntawm kev sib piv kab rov tav, microscopic amplification thiab lwm txoj hauv kev (qhov no yog qhov tsis muaj peev xwm tshaj plaws hauv kev lag luam aerosol tam sim no)
Yog li ntawd, cov khoom lag luam ruaj khov yuav tsum muaj txhua yam, thiab yuav tsum muaj kev ua tiav zoo los tswj tag nrho cov chaw nres nkoj xa khoom (suav nrog cov qauv kev yuav khoom, kev tshawb fawb thiab kev tsim kho, cov qauv tshuaj xyuas, cov qauv tsim khoom, thiab lwm yam) kom ua tau raws li tus qauv zoo. lub tswv yim, thiaj li los xyuas kom meej qhov kawg stability thiab conformity ntawm peb cov khoom.
Hmoov tsis zoo, qhov peb xav qhia tam sim no yog qhov kev ntsuas kev ruaj ntseg tsis tuaj yeem lav tias tsis muaj teeb meem hauv kev sim kev ruaj ntseg, thiab cov khoom loj yuav tsum tsis muaj teeb meem.Ua ke nrog cov kev xav saum toj no thiab kev ntsuas kev ruaj ntseg ntawm txhua yam khoom, peb tuaj yeem tiv thaiv qhov feem ntau ntawm cov kev phom sij zais.Tseem muaj qee qhov teeb meem tos peb tshawb nrhiav, nrhiav thiab daws.Ib qho ntawm cov kev nyiam ntawm aerosols yog tias ntau tus neeg xav kom daws tau qhov tsis paub ntau ntxiv.


Post lub sij hawm: Jun-23-2022
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