Zadza fomu riri pazasi uye tichakutumira email yePDF ye "Kuvandudzwa kwetekinoroji itsva yekushandura kabhoni dhayokisaidhi kuita mafuta emvura"
Kabhoni dhayiokisijeni (CO2) inokonzerwa nekupisa mafuta ekare uye gasi rinopisa zvakanyanya, iro rinogona kushandurwa kuita mafuta anobatsira nenzira inochengetedza nguva dzose. Imwe nzira inovimbisa yekushandura kuburitswa kweCO2 kuita mafuta ekudya inzira inonzi electrochemical reduction. Asi kuti ive inoshanda mukutengeserana, maitiro aya anofanira kuvandudzwa kuti asarudze kana kugadzira zvigadzirwa zvakawanda zvinodiwa zvine kabhoni. Iye zvino, sezvakashumwa mujenari reNature Energy, Lawrence Berkeley National Laboratory (Berkeley Lab) yakagadzira nzira itsva yekuvandudza pamusoro pechinokonzeresa mhangura chinoshandiswa pakubatsira, nokudaro ichiwedzera kusarudzwa kwemaitiro acho.
“Kunyangwe tichiziva kuti mhangura ndiyo inonyanya kukonzera izvi, haipe mukana wekusarudza zvakanyanya chigadzirwa chaunoda,” akadaro Alexis, musayendisiti mukuru muDhipatimendi reSainzi dzeMakemikari paBerkeley Lab uye purofesa weinjiniya yemakemikari paYunivhesiti yeCalifornia, Berkeley. Spell akadaro. “Chikwata chedu chakaona kuti unogona kushandisa nharaunda yemuno ye catalyst kuita manomano akasiyana-siyana ekupa rudzi urwu rwekusarudza.”
Muzvidzidzo zvekare, vaongorori vakagadzira mamiriro chaiwo ekupa nzvimbo yakanakisa yemagetsi nemakemikari yekugadzira zvigadzirwa zvine kabhoni yakawanda zvine kukosha kwekutengeserana. Asi mamiriro aya anopesana nemamiriro ezvinhu anowanzoitika mumasero emafuta akajairika achishandisa zvinhu zvinofambisa mvura.
Kuti vaone dhizaini inogona kushandiswa munzvimbo yemafuta emumvura, sechikamu chechirongwa cheEnergy Innovation Center cheMinistry of Energy's Liquid Sunshine Alliance, Bell nechikwata chake vakashandisa ionomer yakatetepa, iyo inobvumira mamwe mamorekuru (ions) ane chaji kuti apfuure nepakati. Bvisa mamwe maion. Nekuda kwehunhu hwavo hwemakemikari hwakasarudzwa zvakanyanya, anonyanya kukodzera kuve nekukanganisa kwakasimba munzvimbo diki.
Chanyeon Kim, muongorori we postdoctoral muboka reBell uye munyori wekutanga wepepa iri, akataura nezvekufukidza pamusoro pema catalysts emhangura nema ionomers maviri akafanana, Nafion neSustaination. Chikwata ichi chakafungidzira kuti kuita izvi kunofanira kuchinja nharaunda iri pedyo ne catalyst—kusanganisira pH nehuwandu hwemvura necarbon dioxide—nenzira yakati kuti kutungamira reaction kuti igadzire zvigadzirwa zvakapfuma mucarbon zvinogona kushandurwa nyore nyore kuita makemikari anobatsira. Zvigadzirwa nemafuta emvura.
Vaongorori vakashandisa jira rakatetepa reionomer imwe neimwe uye jira rakapetwa kaviri reionomer mbiri kufirimu remhangura rakatsigirwa nepolymer kuti vagadzire firimu, ravaigona kuisa pedyo nemugumo wesero remagetsi rakaumbwa nemaoko. Pavaipinza kabhoni dioksijeni mubhatiri uye vachishandisa voltage, vaiyera huwandu hwemagetsi huri kuyerera nebhatiri. Zvadaro vakayera gasi nemvura zvakaunganidzwa mudura riri pedyo panguva yekuita. Pabhokisi rine jira mbiri, vakaona kuti zvigadzirwa zvakapfuma mukabhoni zvaiita 80% yesimba rinodyiwa nekuita - kupfuura 60% mubhokisi risina kuputirwa.
"Kuputira sandwich uku kunopa zvakanakisa pane zvese zviri zviviri: kusarudza zvigadzirwa zvakawanda uye kushanda zvakanyanya," akadaro Bell. Nzvimbo ine mativi maviri haina kunaka chete kune zvigadzirwa zvine kabhoni yakawanda, asiwo inogadzira simba rakasimba panguva imwe chete, zvichiratidza kuwedzera kwebasa.
Vaongorori vakagumisa kuti mhinduro iri nani yakakonzerwa nehuwandu hwakawanda hweCO2 hwakaunganidzwa mu coating zvakananga pamusoro pe copper. Pamusoro pezvo, mamorekuru ane charge yakaipa anoungana munzvimbo iri pakati pe ionomers maviri achaburitsa acidity yakaderera yemuno. Kusanganiswa uku kunotsiva kutengeserana kwehuwandu kunowanzoitika kana pasina mafirimu e ionomers.
Kuti vawedzere kuvandudza mashandiro emhinduro, vaongorori vakashandisa tekinoroji yakamboshandiswa kare isingade firimu re ionomer seimwe nzira yekuwedzera CO2 ne pH: pulsed voltage. Nekushandisa pulsed voltage kune double-layer ionomer coating, vaongorori vakawana kuwedzera kwe250% muzvigadzirwa zvakapfuma mu carbon zvichienzaniswa nemhangura isina kuputirwa uye static voltage.
Kunyange hazvo vamwe vaongorori vachinyanya kutarisisa basa ravo pakugadzira macatalyst matsva, kuwanikwa kwecatalyst hakufungi nezvemamiriro ekushanda. Kudzora nharaunda pamusoro pecatalyst inzira itsva uye yakasiyana.
"Hatina kuuya nechinhu chitsva chose, asi takashandisa kunzwisisa kwedu reaction kinetics uye takashandisa ruzivo urwu kutitungamirira mukufunga nezvekuchinja nharaunda yenzvimbo ye catalyst," akadaro Adam Weber, mainjiniya mukuru. Masayendisiti ari mumunda we tekinoroji yesimba kuBerkeley Laboratories uye munyori wezvinyorwa.
Danho rinotevera nderekuwedzera kugadzirwa kwema catalysts akafukidzwa. Kuedza kwekutanga kwechikwata cheBerkeley Lab kwaisanganisira masisitimu madiki emhando dzakatsetseka, ayo aive nyore kupfuura zvivakwa zvakakura zvine maburi anodiwa pakushandiswa kwekutengeserana. "Hazvina kuoma kuisa coating pamusoro penzvimbo yakatsetseka. Asi nzira dzekutengeserana dzingasanganisira kufukidza mabhora madiki emhangura," akadaro Bell. Kuwedzera jira rechipiri re coating kunova kwakaoma. Imwe nzira ndeyekusanganisa nekuisa coating mbiri idzi pamwe chete mu solvent, uye kutarisira kuti dzichaparadzana kana solvent yapera. Ko kana ikasadaro? Bell akagumisa achiti: "Tinongoda kuva vakangwara." Tarisa kuna Kim C, Bui JC, Luo X nevamwe. Catalyst microenvironment yakagadzirirwa kuderedza CO2 kuita zvigadzirwa zve multi-carbon uchishandisa double-layer ionomer coating pamhangura. Nat Energy. 2021;6(11):1026-1034. doi:10.1038/s41560-021-00920-8
Nyaya iyi yakatorwa kubva muzvinyorwa zvinotevera. Cherechedza: Zvinyorwa izvi zvinogona kunge zvakagadziriswa zvichienderana nehurefu uye zviri mukati. Kuti uwane rumwe ruzivo, ndapota taura netsamba yataurwa.
Nguva yekutumira: Mbudzi-22-2021
