Zadza fomu riri pazasi uye isu tichakutumira email iyo PDF vhezheni ye "New tekinoroji kuvandudza kushandura kabhoni dhaidhirosi kuita mafuta emvura"
Carbon dioxide (CO2) chigadzirwa chekupisa mafuta ezvicherwa uye gasi rinopisa regreenhouse, iro rinogona kudzoserwa kuita mafuta anobatsira nenzira yakagadzikana. Imwe nzira inovimbisa yekushandura CO2 emissions kuita mafuta feedstock inzira inonzi electrochemical reduction. Asi kuti ive yekutengeserana, maitiro anofanirwa kuvandudzwa kuti asarudze kana kuburitsa zvimwe zvinodikanwa-zvakapfuma kabhoni. Iye zvino, sezvakataurwa mumagazini inonzi Nature Energy, Lawrence Berkeley National Laboratory (Berkeley Lab) yakagadzira nzira itsva yekuvandudza pamusoro pemhangura yemhangura inoshandiswa pakuita kwekubatsira, nokudaro kuwedzera kusarudzwa kwemaitiro.
"Kunyange zvazvo tichiziva kuti mhangura ndiyo inonyanya kukonzera kuita uku, haipi kusarudzwa kwepamusoro kwechigadzirwa chinodiwa," akadaro Alexis, musayendisiti mukuru muDhipatimendi reChemical Sciences kuBerkeley Lab uye purofesa wemakemikari engineering paYunivhesiti. yeCalifornia, Berkeley. Spell akadaro. "Chikwata chedu chakaona kuti unogona kushandisa nharaunda yecatalyst kuita manomano akasiyana kupa rudzi urwu rwekusarudzika."
Muzvidzidzo zvakapfuura, vaongorori vakagadzira mamiriro chaiwo ekupa yakanakisa magetsi nemakemikari nharaunda yekugadzira kabhoni-yakapfuma zvigadzirwa zvine mutengo wekutengesa. Asi aya mamiriro anopesana nemamiriro ezvinhu anowanzoitika mumaseru emafuta anoshandisa mvura-based conductive zvinhu.
Kuti vaone dhizaini inogona kushandiswa munzvimbo yemafuta emvura, sechikamu cheEnergy Innovation Center chirongwa cheMinistry of Energy's Liquid Sunshine Alliance, Bell nechikwata chake vakashandura kuita yakatetepa layer ye ionomer, iyo inobvumira imwe mhosva. mamorekuru (ions) kuti apfuure. Usasanganisa mamwe maion. Nekuda kwemaitiro avo emakemikari akasarudzika, anonyanya kukodzera kuve nekukanganisa kwakasimba pane microenvironment.
Chanyeon Kim, muongorori wepashure muboka reBell uye munyori wekutanga webepa, akakurudzira kupfeka pamusoro pemhangura zvinokonzeresa nemaionomer maviri akafanana, Nafion uye Sustainion. Chikwata chakafungidzira kuti kuita izvi kunofanira kushandura nharaunda iri pedyo nekatani-kusanganisira pH nehuwandu hwemvura uye carbon dioxide-mune imwe nzira kutungamira maitiro ekubudisa carbon-rich zvigadzirwa zvinogona kushandurwa nyore nyore kuita makemikari anobatsira. Zvigadzirwa nemafuta emvura.
Vatsvakurudzi vakashandisa chidimbu chakatetepa cheionomer imwe neimwe uye kaviri yeionomers maviri kune firimu remhangura rinotsigirwa nepolymer zvinhu kuti riumbe firimu, ravaigona kuisa pedyo nemagumo emagetsi e electrochemical cell. Pavaipinza carbon dioxide mubhatiri nekuisa voltage, vaiyera huwandu hwazvino unoyerera nemubhatiri. Ipapo vakayera gasi uye mvura yakaunganidzwa mudhamu riri pedyo panguva yaiitwa. Kune maviri-layer kesi, vakawana kuti kabhoni-yakapfuma zvigadzirwa zvakaverengera 80% yesimba rinopedzwa nemhinduro-yakakwirira kupfuura 60% mune isina kuvharwa kesi.
"Ichi sandwich coating chinopa zvakanakisa zvepasirese: high product selectivity uye basa repamusoro," akadaro Bell. Iyo kaviri-layer surface haisi yakanaka chete kune zvigadzirwa zvekabhoni, asi zvakare inogadzira ikozvino yakasimba panguva imwe chete, zvichiratidza kuwedzera kwekuita.
Vatsvakurudzi vakagumisa kuti mhinduro yakagadziridzwa yaiva mugumisiro wepamusoro weCO2 yakasungirirwa mukuputira zvakananga pamusoro pemhangura. Pamusoro pezvo, mamorekuru anochajiswa zvisina kunaka anoungana munharaunda pakati pemaionomeri maviri anoburitsa acidity yenzvimbo yakaderera. Musanganiswa uyu unobvisa kutengeserana-kusiyana kunowanzo kuitika kana pasina mafirimu eonomer.
Kuti uwedzere kuvandudza kushanda kwemaitiro, vaongorori vakatendeukira kune yakamboratidzwa tekinoroji isingade ionomer firimu seimwe nzira yekuwedzera CO2 uye pH: pulsed voltage. Nekushandisa pulsed voltage kune yakapetwa kaviri-layer ionomer coating, vaongorori vakawana 250% yekuwedzera mune kabhoni-yakapfuma zvigadzirwa zvichienzaniswa nemhangura isina kuvharwa uye static voltage.
Kunyange zvazvo vamwe vatsvakurudzi vachitarisa basa ravo pakugadzirwa kwezvitsva zvitsva, kuwanikwa kwechigadzirisi hakufungi nezvemamiriro ekushanda. Kudzora zvakatipoteredza pane catalyst pamusoro inzira itsva uye yakasiyana.
"Hatina kuuya nechigadziriso chitsva zvachose, asi takashandisa kunzwisisa kwedu kwemaitiro kinetics uye takashandisa ruzivo urwu kutitungamirira mukufunga nezvekuchinja nharaunda yenzvimbo inokonzeresa," akadaro Adam Weber, injiniya mukuru. Masayendisiti mumunda wesimba tekinoroji kuBerkeley Laboratories uye co-munyori wemapepa.
Danho rinotevera nderekuwedzera kugadzirwa kwecoated catalysts. Chiyedzo chekutanga chechikwata cheBerkeley Lab chaisanganisira masisitimu madiki emodhiyo, ayo aive akapfava kupfuura mahombe-nzvimbo ane porous maumbirwo anodiwa pakushandisa kwekutengesa. “Hazvina kuoma kuisa jasi panzvimbo yakati sandara. Asi nzira dzekutengesa dzinogona kusanganisira kuvhara mabhora madiki emhangura, ”akadaro Bell. Kuwedzera chikamu chechipiri chekuputira kunova kwakaoma. Imwe mukana ndeyekusanganisa uye kuisa mabhanhire maviri pamwe chete musolvent, uye tarisira kuti anoparadzana kana chinonyungudutsa chabuda. Ko kana vakasadaro? Bell akagumisa kuti: “Tinongoda kuva vakangwara.” Tarisa kuna Kim C, Bui JC, Luo X nevamwe. Customized catalyst microenvironment yekudzikisa electro-ye CO2 kune akawanda-carbon zvigadzirwa uchishandisa kaviri-layer ionomer coating pamhangura. Nhoroondo ye Nat Energy. 2021;6(11):1026-1034. doi:10.1038/s41560-021-00920-8
Chinyorwa ichi chakatsikiswa kubva pane zvinotevera. Cherechedza: Zvinyorwa zvinogona kunge zvakagadziridzwa kureba uye zviri mukati. Kuti uwane rumwe ruzivo, ndapota taura kune yakanyorwa source.
Nguva yekutumira: Nov-22-2021
