Cellulose, polymer nyinshi cyane ku isi, igize igice kinini cya biomass nibikoresho bitandukanye byinganda.Inyangamugayo zidasanzwe zubaka zitera imbogamizi zo gusenyuka neza, ningirakamaro mubikorwa nko kubyara ibicanwa no gucunga imyanda.Hydrogen peroxide (H2O2) yagaragaye nkumukandida ushobora gusesekara selile bitewe na kamere yayo yangiza ibidukikije hamwe na okiside.
Iriburiro:
Cellulose, polysaccharide igizwe na glucose igizwe na β-1,4-glycosideque, ni igice kinini cyimiterere yinkuta za selile.Ubwinshi bwayo muri biyomasi butuma iba isoko ishimishije mu nganda zinyuranye, zirimo impapuro na pulp, imyenda, na bioenergy.Nyamara, urusobe rukomeye rwa hydrogène ihuza fibrile ya selile ituma idashobora kwihanganira gushonga mumashanyarazi menshi, bitera ibibazo kubikoresha neza no gutunganya neza.
Uburyo gakondo bwo gusesa selile burimo ibihe bibi, nka acide yibanze cyangwa amazi ya ionic, bikunze kuba bifitanye isano nibidukikije no gukoresha ingufu nyinshi.Ibinyuranye, hydrogène peroxide itanga ubundi buryo butanga ikizere kubera imiterere ya okiside yoroheje hamwe nubushobozi bwo gutunganya selile yangiza ibidukikije.Uru rupapuro rwinjiye muburyo bukoreshwa na hydrogen peroxide-yunganiwe na selile ya selile kandi isuzuma imikorere yayo nuburyo bukoreshwa.
Uburyo bwo gusenyuka kwa selile na hydrogen Peroxide:
Iseswa rya selile na hydrogen peroxide ikubiyemo imiti igoye, cyane cyane okiside ya okiside ya glycosideque no guhagarika guhuza hydrogène intermolecular.Ubusanzwe inzira ikomeza binyuze mu ntambwe zikurikira:
Oxidation yitsinda rya Hydroxyl: Hydrogene peroxide ifata hamwe na selile hydroxyl ya selile, biganisha kumikorere ya hydroxyl radicals (• OH) ikoresheje reaction ya Fenton cyangwa Fenton imbere yibyuma byinzibacyuho.Izi radicals zitera imigozi ya glycoside, itangiza urunigi kandi ikabyara selile ngufi.
Ihungabana rya hydrogène: Hydroxyl radicals nayo ihungabanya umuyoboro wa hydrogène uhuza iminyururu ya selile, bigabanya imiterere rusange kandi bikorohereza kwikiza.
Imiterere yibikomoka kuri Soluble: Kwangirika kwa okiside ya selile bituma habaho imiyoboro ihuza amazi, nka acide karubike, aldehydes, na ketone.Ibikomokaho bigira uruhare mubikorwa byo gusesa mukongera imbaraga no kugabanya ubukonje.
Depolymerisation no gucamo ibice: Ibindi byongera okiside hamwe na clavage reaction biganisha kuri depolymerisation yumunyururu wa selile muri oligomeri ngufi hanyuma amaherezo igashonga isukari cyangwa ibindi bicuruzwa bifite uburemere buke.
Ibintu bigira ingaruka kuri hydrogène Peroxide-Yunganirwa na Cellulose:
Imikorere yo gusesa selile ukoresheje hydrogen peroxide iterwa nibintu bitandukanye, harimo:
Kwishyira hamwe kwa Hydrogene Peroxide: Ubushuhe bwinshi bwa hydrogène peroxide mubisanzwe bivamo umuvuduko mwinshi no kwangirika kwa selile.Nyamara, kwibanda cyane kurenza urugero bishobora kuganisha kuruhande cyangwa ibicuruzwa bitifuzwa.
pH nubushyuhe: pH yuburyo bwa reaction igira ingaruka kubyara hydroxyl radicals hamwe no gukomera kwa selile.Imiterere ya acide iringaniye (pH 3-5) ikunze guhitamo kongera imbaraga za selile idafite kwangirika gukomeye.Byongeye kandi, ubushyuhe bugira ingaruka kumikorere, hamwe nubushyuhe bwo hejuru muri rusange byihutisha inzira yo gusesa.
Kubaho kwa Catalizator: Iyoni yinzibacyuho, nkicyuma cyangwa umuringa, irashobora guhagarika kwangirika kwa hydrogène peroxide no kongera imiterere ya hydroxyl radicals.Nyamara, guhitamo catalizator hamwe nibitekerezo byayo bigomba gutezimbere witonze kugirango ugabanye ingaruka kandi urebe neza ibicuruzwa.
Cellulose Morphology na Crystallinity: Kuba iminyururu ya selile igera kuri hydrogène peroxide na hydroxyl radicals iterwa na morphologie yibikoresho hamwe na kristaline.Uturere twa Amorphous dushobora kwibasirwa cyane kuruta domeni ya kristaline cyane, bisaba ingamba zo kwitegura cyangwa guhindura ingamba zo kunoza uburyo bworoshye.
Ibyiza nogukoresha Hydrogene Peroxide mugusenyuka kwa Cellulose:
Hydrogen peroxide itanga ibyiza byinshi byo gusesa selile ugereranije nuburyo busanzwe:
Guhuza ibidukikije: Bitandukanye n’imiti ikaze nka acide sulfurike cyangwa umusemburo wa chlorine, hydrogen peroxide isa neza kandi ibora mu mazi na ogisijeni mu bihe byoroheje.Ibidukikije byangiza ibidukikije bituma bikwiranye no gutunganya selile irambye no gutunganya imyanda.
Imiterere yoroheje: Hydrogene peroxide-yunganiwe na selile yamashanyarazi irashobora gukorwa mugihe cyoroheje cyubushyuhe nigitutu, bikagabanya gukoresha ingufu nigiciro cyibikorwa ugereranije na hydrolysis ya acide yubushyuhe bwinshi cyangwa kuvura ionic.
Oxidation Yatoranijwe: Okiside ya okiside ya glycosideque ya hydrogène peroxide irashobora kugenzurwa kurwego runaka, bigatuma habaho guhitamo iminyururu ya selile no gukora ibikomoka kubudozi bifite imiterere yihariye.
Porogaramu zinyuranye: Ibikomoka kuri selile ya elegitoronike ikomoka kuri hydrogène peroxide-yunganirwa no gusesa bifite imbaraga zishobora gukoreshwa mubice bitandukanye, birimo umusaruro wa biyogi, ibikoresho bikora, ibikoresho bikoresha imiti, hamwe no gutunganya amazi mabi.
Inzitizi n'icyerekezo kizaza:
Nubwo ibiranga ibyiringiro byayo, hydrogen peroxide-yunganiwe na selile yamashanyarazi ihura nibibazo byinshi hamwe niterambere ryiterambere:
Guhitamo no gutanga umusaruro: Kugera ku musaruro mwinshi wa selulose ikomoka ku ngirabuzimafatizo hamwe na reaction nkeya bikomeje kuba ingorabahizi, cyane cyane ku biryo bigoye bya biomass birimo lignine na hemicellulose.
Kwishyira hamwe no Kwishyira hamwe: Kwagura hydrogène peroxide ishingiye kuri selile yamashanyarazi kugeza ku rwego rwinganda bisaba gutekereza cyane ku gishushanyo mbonera cya reaction, kugarura ibisubizo, no gutunganya inzira zo hasi kugirango harebwe niba ubukungu bwifashe neza ndetse n’ibidukikije birambye.
Iterambere rya Catalizike: Igishushanyo mbonera cyiza cya hydrogène peroxide ikora hamwe na okiside ya selile ni ngombwa mugutezimbere igipimo cyoguhitamo no guhitamo mugihe hagabanijwe imitwaro ya catalizike hamwe nibicuruzwa.
Guha agaciro ibicuruzwa biva mu mahanga: Ingamba zo guha agaciro ibicuruzwa biva mu gihe cya hydrogène peroxide-yunganiwe na selile yangiza, nka acide karubike cyangwa isukari ya oligomerique, bishobora kurushaho kuzamura iterambere rirambye muri rusange no mu bukungu.
Hydrogene peroxide ifite isezerano rikomeye nkicyatsi kibisi kandi gihindagurika mugusenyuka kwa selile, bitanga ibyiza nko guhuza ibidukikije, imiterere yoroheje, hamwe na okiside ihitamo.Nubwo hari ibibazo bikomeje, ubushakashatsi bwakomeje gukorwa hagamijwe gusobanura uburyo bwibanze, guhitamo ibipimo byerekana, no gushakisha uburyo bushya bwo gukora bizarushaho kunoza uburyo burambye kandi burambye bwa hydrogène peroxide ishingiye kubikorwa byo guha agaciro selile.
Igihe cyo kohereza: Apr-10-2024