Muna amfani da kukis don inganta ƙwarewar ku. Ta ci gaba da bincika wannan rukunin yanar gizon, kun yarda da amfani da kukis. Karin bayani.
Wannan labarin yana mai da hankali kan kaddarorin acidity na oxide masu haɓakawa da tallafi (γ-Al2O3, CeO2, ZrO2, SiO2, TiO2, HZSM5 zeolite) da kuma kwatankwacin gano saman su ta hanyar auna zafin ammonia desorption (ATPD). ATPD wata hanya ce ta dogara kuma mai sauƙi wanda saman, bayan an cika shi da ammonia a ƙananan zafin jiki, yana fuskantar canjin yanayin zafi, wanda ke haifar da lalata kwayoyin bincike da kuma rarraba zafin jiki.
Ta hanyar ƙididdigewa da / ko ƙididdiga na ƙididdiga na ƙirar ƙira, za a iya samun bayanai game da makamashi na desorption / adsorption da adadin ammonia da aka yi a saman (ammonia). A matsayin kwayar halitta ta asali, ana iya amfani da ammonia azaman bincike don tantance acidity na saman. Waɗannan bayanan na iya taimakawa wajen fahimtar halayen haɓakar samfuran kuma har ma suna taimakawa daidaita haɓakar sabbin tsarin. Maimakon yin amfani da na'urar ganowa ta TCD na gargajiya, an yi amfani da na'ura mai ƙima ta quadrupole (Hiden HPR-20 QIC) a cikin aikin, an haɗa shi da na'urar gwaji ta hanyar zafi mai zafi.
Amfani da QMS yana ba mu damar sauƙi bambanta tsakanin nau'ikan nau'ikan nau'ikan desorbed daga saman ba tare da amfani da kowane sinadari ko matatun jiki da tarkuna waɗanda zasu iya yin tasiri ga bincike ba. Saitin da ya dace na yuwuwar ionization na kayan aiki yana taimakawa hana rarrabuwar ƙwayoyin ruwa da sakamakon tsangwama tare da siginar ammonia m/z. An yi nazarin daidaito da amincin bayanan ɓarkewar ammonia da aka tsara yanayin zafin jiki ta hanyar amfani da ma'auni na ka'idoji da gwaje-gwajen gwaji, suna nuna tasirin yanayin tattara bayanai, iskar gas, girman barbashi, da lissafi na reactor, yana nuna sassaucin hanyar da aka yi amfani da su.
Duk kayan da aka yi nazari suna da hadaddun hanyoyin ATPD da suka mamaye kewayon 423-873K, ban da cerium, wanda ke nuna ƙwanƙolin kunkuntar ɓarke mai nunin ƙarancin acidity. Ƙididdiga masu yawa suna nuna bambance-bambance a cikin ɗaukar ammonia tsakanin sauran kayan da silica fiye da tsari na girma. Tun da ATPD rarraba cerium ya bi hanyar Gaussian ba tare da la'akari da ɗaukar hoto da kuma yawan dumama ba, an kwatanta halin kayan da aka yi nazari a matsayin layi na ayyukan Gaussian guda hudu da ke hade da haɗuwa da matsakaici, raunana, karfi, da kuma ƙungiyoyi masu karfi. . Da zarar an tattara duk bayanai, an yi amfani da bincike na ƙirar ƙirar ATPD don taimakawa samun bayanai kan ƙarfin tallan ƙwayar ƙwayar cuta a matsayin aikin kowane zafin jiki na lalata. Rarraba makamashi ta wurin wuri yana nuna ƙimar acidity masu zuwa bisa matsakaicin ƙimar makamashi (a cikin kJ/mol) (misali ɗaukar hoto θ = 0.5).
A matsayin amsawar bincike, propene ya kasance yana fama da rashin ruwa na isopropanol don samun ƙarin bayani game da ayyukan kayan da ake nazarin. Sakamakon da aka samu ya yi daidai da ma'auni na ATPD na baya dangane da ƙarfi da yalwar wuraren acid ɗin, kuma ya ba da damar bambance tsakanin rukunin Brønsted da Lewis acid.
Hoto 1. (Hagu) Deconvolution na bayanin martaba na ATPD ta amfani da aikin Gaussian (layin launin rawaya mai launin rawaya yana wakiltar bayanin da aka samar, ɗigo baƙar fata sune bayanan gwaji) (dama) aikin rarraba makamashi na Ammoniya a wurare daban-daban.
Roberto Di Cio Faculty of Engineering, Jami'ar Messina, Contrada Dee Dee, Sant'Agata, I-98166 Messina, Italiya
Francesco Arena, Roberto Di Cio, Giuseppe Trunfio (2015) "Kimanin Gwaji na Hanyar Ammoniya Zazzaɓi-Shirye-shiryen Desorption Hanyar don Binciken Abubuwan Acid na Fuskokin Kayayyakin Halitta" Aikata Catalysis A: Bita 503, 227-236
Boye nazari. (Fabrairu 9, 2022). Gwajin kimantawa na hanyar zafin-shirya desorption na ammonia don nazarin kaddarorin acid na sama da iri-iri na kara kuzari. AZ. An dawo da Satumba 7, 2023 daga https://www.azom.com/article.aspx?ArticleID=14016.
Boye nazari. "Kimanin Gwaji na Hanyar Ɗaukar Ammoniya-Shirye-shiryen Zazzaɓi don Nazarin Abubuwan Acid na Fuskokin Mai Kayatarwa". AZ. Satumba 7, 2023
Boye nazari. "Kimanin Gwaji na Hanyar ɓata Ammonia-Shirye-shiryen Zazzabi don Nazarin Abubuwan Acid na Fuskokin Mai Kayatarwa". AZ. https://www.azom.com/article.aspx?ArticleID=14016. (An Shiga: Satumba 7, 2023).
Boye nazari. 2022. Ƙimar gwaji na hanyar da za a yi amfani da ammonia mai zafin jiki don nazarin kaddarorin acidic na filaye masu kara kuzari. AZoM, an shiga 7 ga Satumba 2023, https://www.azom.com/article.aspx?ArticleID=14016.
Lokacin aikawa: Satumba-07-2023
