Thaum cov kws kho dej kho dej tham txog kev tsim cov sodium hypochlorite ntawm -site, ib feem tseem tuaj: titanium anode pas nrig. Nws zaum ntawm lub plawv ntawm txhua lub xov tooj ntawm tes electrolytic, thiab tsis muaj nws, cov tshuaj chlorine evolution tsuas tsis ua raws li cov txheej txheem tshuaj tua kab mob niaj hnub xav tau. Kab lus no rhuav tshem raws nraim li cas cov tshuaj tiv thaiv ua haujlwm, vim li cas cov khoom siv anode tseem ceeb heev, thiab dab tsi cais cov electrode txhim khu kev qha los ntawm ib qho uas ua tsis tau raws sijhawm.
Yuav Ua Li Cas Titanium Anode Qws Tsav chlorine Evolution Reaction?
Electrochemical Mechanism Tom Qab Chlorine Generation
Ib txoj hauv kev yooj yim electrochemical yog siv los ua electrolytic sodium hypochlorite. Chloride ions txav mus rau ntawm qhov chaw anode thaum cov dej ncaj qha ntws los ntawm cov tshuaj brine. Hauv cov txheej txheem oxidation ntawm qhov chaw, lawv tso cov hluav taws xob, ua cov roj chlorine (Cl₂). Cov roj dissolves tam sim ntawd nyob rau hauv cov tshuaj nyob ze rau cathode, ua hypochlorous acid (HOCl) thiab hypochlorite ions (OCl⁻), uas yog dab tsi tshuaj tua kab mob.
Ob lub Cl⁻ atom hloov mus rau Cl₂ thiab ob e⁻ atoms. Sodium hypochlorite yog tsim thaum cov kua Cl₂ sib tov nrog sodium hydroxide ua ntawm cathode. Tag nrho cov txheej txheem nyob ntawm seb qhov anode nto nrawm npaum li cas rau thawj kauj ruam ntawm chloride oxidation.
Vim li cas cov khoom Anode txiav txim siab qhov ua tau zoo
Hauv kev lag luam chaw, qhov tshuaj tiv thaiv tsis tuaj yeem tshwm sim nrog txhua yam khoom siv hluav taws xob.
Lub anode yuav tsum muaj peev xwm ua hauj lwm nyob rau hauv ib tug chloride - thiab oxidizing ib puag ncig heev thaum ua kom nws overpotential tsawg. Qhov no yog qhov ntxiv voltage uas xav tau tshaj qhov theoretical yam tsawg kawg nkaus los tsav cov tshuaj tiv thaiv. titanium anode pas nrig npog nrog sib xyaw hlau oxides (MMO) tuaj yeem tsim cov khoom siv ntau dhau ntawm 40 thiab 80 mV rau cov tshuaj chlorine, uas yog tsawg dua li lwm cov kev xaiv. Kev txo qis cov peev txheej ncaj qha ua rau tsawg zog siv ib kilogram ntawm chlorine uas siv tau.
Titanium Anode Qws thiab Chloride Ion Oxidation ntawm Anode Deg
Dab tsi tshwm sim ntawm Electrode-Electrolyte Interface
Cov chemistry yog qhov tseeb heev ntawm qhov chaw anode. Thaum cov chloride ions tau mus rau qhov chaw uas cov electrode thiab cov tshuaj sib ntsib, lawv lo rau qhov chaw catalytic nyob rau hauv txheej. Lub ruthenium dioxide (RuO₂) ib feem ntawm ruthenium- iridium MMO txheej zoo heev ntawm catalyzing cov tshuaj tiv thaiv vim nws txo qis lub zog xav tau los pib Cl⁻ oxidation txheej txheem. Iridium dioxide (IrO₂) ua kom cov txheej txheem ruaj khov thaum lub sij hawm ntev ntawm oxidation thiab nres qhov sib tw oxygen evolution cov tshuaj tiv thaiv (OER), uas yuav siv tam sim no yam tsis muaj cov tshuaj chlorine muaj txiaj ntsig.
Ib txoj kev tshawb fawb hauv Phau Ntawv Xov Xwm ntawm Lub Koom Haum Electrochemical qhia tau hais tias sib xyaw oxide txheej ntawm RuO₂ thiab IrO₂ ib txwm ua tau zoo dua li ib qho - cov txheej txheem oxide nyob rau hauv cov nqe lus ntawm ob qho tib si tam sim no efficiency thiab txheej ruaj khov thaum electrolyzed hauv dej ntsev ntau dua.
Yuav Ua Li Cas Txheej Txheej Txheej Txheem Xaiv Xaiv
Ib txoj hauv kev los ntsuas kev ua tiav yog saib cov tshuaj chlorine evolution xaiv, uas yog tus nqi tam sim no uas ntws mus rau Cl₂ tsis yog O₂. Nyob ntawm qhov kub thiab qhov ceev tam sim no, lub qhov dej - ua MMOtitanium anode pas nrigtuaj yeem tau txais cov tshuaj chlorine tam sim no ua haujlwm siab tshaj 85-95% hauv cov kuab tshuaj concentrated. Qhov kev xaiv siab no tsis yog qhov yuam kev. Tus nqi ntawm ruthenium mus rau iridium, lub thickness ntawm txheej, thiab cov duab ntawm lub nto tag nrho ua hauj lwm ua ke kom Cl⁻ adsorption ntau dua li dej oxidation. Lub siab -Kev ua tau zoo MMO anode yog qhov sib txawv ntawm cov khoom lag luam vim nws ua kom zoo dua cov kev txwv no.
Yuav ua li cas MMO Titanium Anode Rods Txhawb chlorine Evolution hauv Brine
Cov txheej txheem ntawm cov hlau oxides sib xyaw ua rau saum npoo nrog ntau qhov ntom ntom uas cuam tshuam ncaj qha nrog cov tshuaj uas muaj chloride nplua nuj. Muaj ntau qhov chaw ua haujlwm hauv ib cheeb tsam hauv cheeb tsam hauv oxide lattice, uas ua kom cov nqi hloov pauv ntawm cov chloride ions thiab cov electrode.
Electrochemical impedance spectroscopy cov kev tshawb fawb tau pom tias titanium electrodes npog nrog MMO muaj tus nqi qis dua -hloov tsis kam tshaj electrodes uas tsis coated los yog ua los ntawm graphite thaum siv tib lub brine.
Nyob rau hauv siab -cov dej qab ntsev zoo li dej hiav txwv antifouling lossis kev kho dej hauv kev lag luam, MMO titanium anode pas nrig ua kom cov tshuaj chlorine tso tawm tas li yam tsis muaj qhov chaw fouling lossis oxide passivation uas txwv tsis pub lwm cov ntaub ntawv ua haujlwm.
Vim hais tias thermally decomposed MMO txheej muaj ib tug ntxeem tau tawg - av nkos morphology, lub tiag tiag active nto cheeb tsam mus txawm ntau dua. Qhov no nce catalytic throughput yam tsis ua rau cov electrode loj dua.
Titanium Anode Qws Nto Ua Haujlwm thiab Sodium Hypochlorite Generation
Kev ua haujlwm saum npoo av thiab tus nqi ntawm sodium hypochlorite uas tau tsim yog txuas ncaj qha. Yog tias qhov kev ua haujlwm saum npoo yog siab dua, ces chloride ions ntau dua yog oxidized rau ib chav tsev ntawm lub sijhawm ib chav tsev ntawm cheeb tsam. Qhov no txhais tau hais tias ntau Cl₂ dissolves rau hauv kev daws thiab muaj ntau HOCl / OCl⁻ los tua kab mob. Txoj haujlwm nyuaj tshaj plaws yog ua kom qhov kev txiav txim mus rau ntau txhiab teev ntawm kev ua haujlwm.
Qhov teeb meem no yog daws los ntawm gradient composite txheej tshuab, uas kis catalytic oxides hla ob peb txheej es tsis txhob tsom rau lawv ntawm ib qho kev sib cuag. Cov khaubncaws sab nraud povtseg ua ke thiab txo kev ntxhov siab, thaum cov txheej txheej sab nrauv yog qhov ua haujlwm catalytic. Cov qauv no txwv tsis pub delamination thiab microcrack kis uas cia chloride -induced passivation mus txog titanium puag.
Thaum lub substrate passivates, tus nqi hauv lub cell nce sai, kev siv lub zog nce mus, thiab cov tshuaj chlorine tawm mus. Yog koj tsim ibtitanium anode pas nrigkom raug, nws yuav tsis tawg nyob rau hauv txoj kev no thiab yuav ua rau nws qhov chaw siab rau lub sijhawm ntev.
Yuav ua li cas Titanium Anode Qws Txhawb Kev Siv Tshuaj Chlorine ruaj khov hauv Electrolysis
Qhov tseem ceeb npaum li qhov muaj peev xwm siab tshaj plaws yog qhov sib xws. Cov chaw kho dej khib nyiab hauv nroog thiab cov tshuab ua kom cov pas dej da dej huv si ib txwm ua haujlwm. Txhua qhov kev hloov pauv ntawm cov tshuaj chlorine tso tawm cuam tshuam rau nws cov tshuaj tua kab mob zoo npaum li cas thiab nws ua raws li cov cai.
Tus nqi ntawm cov tshuaj chlorine nyob ruaj khov nrog titanium anode pas nrig tsim los txuas ntxiv -lub luag haujlwm electrolysis. Qhov no yog ua los ntawm kev sib xyaw ntawm cov xov tooj ntawm tes tsis tshua muaj thiab ruaj khov, cov txheej txheem siab adhesion, thiab lub hauv paus corrosion kuj.
Titanium's natural oxide txheej (TiO₂) tiv taus corrosion hauv chloride - nplua nuj ib puag ncig. Txawm li cas los xij, txheej txheej oxide no tuaj yeem ua teeb meem yog tias nws loj hlob ntau dhau ntawm MMO txheej, uas yog hu ua passivation.
Advanced substrate pretreatment, xws li etching, deg roughening, thiab intermediate bonding khaubncaws sab nraud povtseg, nres TiO₂ los ntawm loj hlob qhov twg cov txheej raws li lub substrate. Qhov kawg tshwm sim yog kev sib dhos electrode uas ua rau lub xov tooj ntawm tes nyob rau hauv qhov nqaim txawm tias tom qab siv ntau xyoo. Qhov no ua rau lub zog siv ntawm 3.2-3.8 kWh ib kilogram ntawm cov tshuaj chlorine siv tau.
Xaus
Cov txheej txheem chlorine evolution zoo li yooj yim, tab sis nws ua tau nyuaj heev. Nyob ntawm qhov chawtitanium anode pas nrig, tag nrho cov kev ua tau zoo sib txawv tuaj ua ke. Cov no muaj xws li overpotential, tam sim no efficiency, txheej durability, thiab substrate stability. Tshawb nrhiav seb qhov kev tawm tsam no ua haujlwm li cas ua kom pom tseeb tias yog vim li cas titanium nrog cov txheej txheem tsim MMO zoo tib yam yog tib txoj hauv kev los ua electrolytic sodium hypochlorite rau kev siv hauv kev kho dej hauv nroog, kev tua kab mob hauv pas dej da dej, kev lag luam circulating dej, thiab seawater antifouling.
FAQ
1.Dab tsi ua rau titanium anode pas nrig ntev dua graphite lossis stainless hlau electrode hauv chlorine evolution daim ntaub ntawv?
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Titanium tiv taus corrosion ntau dua li graphite lossis stainless hlau hauv chloride - nplua nuj, oxidizing ib puag ncig. Thaum lub sij hawm anodic oxidation, graphite tawg thiab paug cov electrolyte. Thaum raug cov tshuaj chlorine active, stainless hlau rusts sai heev. Titanium ua kom cov qauv muaj zog, thiab MMO txheej muab cov catalytic nto. Qhov no cia cov electrode ua haujlwm tsis tu ncua rau 8-10 xyoo raws li kev tswj xyuas.
2.Qhov kev ceev tam sim no cuam tshuam li cas rau kev ua haujlwm ntawm MMO titanium anode pas nrig?
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Too much current density speeds up the wear of the coating and raises the temperature of the cell, which changes the selectivity toward oxygen evolution and lowers the efficiency of the chlorine current. Feem ntau MMO titanium anode rods tau pom zoo rau qee qhov tam sim no qhov ceev ntau yam - feem ntau 200–500 A / m² rau brine electrolysis - thiab nyob rau hauv qhov chaw tiv thaiv qhov npog thiab ua kom cov tshuaj chlorine tso tawm tsis tu ncua.
3.Puas siv titanium anode pas nrig hauv qis -kev kho dej qab ntsev?
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Raws li qhov concentration ntawm chloride tee, cov tshuaj tiv thaiv yuav muaj kev sib tw nrog oxygen evolution, uas ua rau cov tshuaj chlorine evolution tsis zoo. Ib qhov dej -tuned ruthenium- iridium MMO txheej, ntawm qhov tod tes, tuaj yeem ua haujlwm hauv cov tshuaj chloride qis dua li cov ntshiab ruthenium lossis txheej txheem oxide txheej. Rau kev siv cov dej haus los yog cov ntsev tsawg, cov kev hloov pauv yuav tsum tau ua rau cov duab electrode thiab qhov ceev tam sim no, nrog rau daim ntawv qhia txheej txheej.
Npaj kom Tau Txais Qhov Siab -Kev Ua Haujlwm Titanium Anode Qws? Tham nrog NAVI Titanium
Lub tuam txhab NAVI Titanium Hlau Technology Co., Ltd. tsim thiab ua ruthenium-iridium coated electrodes uas tau ua los ua haujlwm hauv siab- ntsev, muaj zog- oxidizing, tsis tu ncua electrolysis ib puag ncig rau 24 teev hauv ib hnub. Raws li kev mob siab rautitanium anode pas nrigtus neeg muag khoom, NAVI Titanium siv gradient txheej thev naus laus zis, siab -purity substrate hloov kho, thiab cuam tshuam catalysis optimization ua cov electrodes uas kav ntev li 8-10 xyoo thiab siv zog me me li 3.2 kWh / kg ntawm cov tshuaj chlorine siv tau. Txawm hais tias qhov project xav tau ib chav me me uas tuaj yeem ua tau 50 g / h lossis lub tshuab loj uas tuaj yeem ua tau 5,000 g / h, NAVI Titanium muaj kev txawj ntse thiab muaj peev xwm ua tau. Mus txog hnub no thiab cia cov pab pawg engineering tsim cov tshuaj electrode rau koj lub cev.
Hu rau:sales@navititanium.com.
Cov ntaub ntawv
1. Trasatti, S. (1987). Electrocatalysis nyob rau hauv anodic evolution ntawm oxygen thiab chlorine. Electrochimica Acta, 32(3), 369–382.
2. Consonni, V., Trasatti, S., Pollak, F., & O'Grady, WE (1987). Mechanism of chlorine evolution on oxide anodes: Kawm txog cov teebmeem pH. Phau ntawv Journal of Electroanalytical Chemistry thiab Interfacial Electrochemistry, 228(1–2), 393–406.
3. Beer, HB (1980). Kev tsim thiab kev tsim kho ntawm cov hlau anodes. Phau ntawv Journal of The Electrochemical Society, 127(8), 303C–307C.
4. Karlsson, RKB, & Cornell, A. (2016). Kev xaiv ntawm oxygen thiab chlorine evolution nyob rau hauv chlor-alkali thiab chlorate txheej txheem. Tshuaj Ntsuam Xyuas, 116(5), 2982–3028.
5. Panic, VV, Dekanski, AB, Miskovic-Stankovic, VB, & Nikolic, BZ (2005). Electrocatalytic kev ua ntawm sol{12}}gel- npaj RuO₂/TiO₂ txheej ntawm titanium rau cov tshuaj chlorine evolution. Phau ntawv Journal of Solid State Electrochemistry, 9(9), 614–619.
6. Moradi, F., & Dehghanian, C. (2014). Ntxiv ntawm IrO₂ rau RuO₂ + TiO₂ coated anodes thiab nws cov nyhuv ntawm electrochemical kev ua tau zoo ntawm anodes hauv chlor-alkali membrane cell. Progress in Natural Science: Materials International, 24(2), 134–141.
