Muna amfani da kukis don inganta ƙwarewar ku. Ta hanyar ci gaba da bincika wannan rukunin yanar gizon, kun yarda da amfani da kukis ɗinmu. Ƙarin bayani.
Wannan labarin ya mayar da hankali kan halayen acidity na saman sinadarai masu kara kuzari da tallafi (γ-Al2O3, CeO2, ZrO2, SiO2, TiO2, HZSM5 zeolite) da kuma gano samansu ta hanyar auna zafin jiki na ammonia desorption (ATPD). ATPD hanya ce mai inganci kuma mai sauƙi wadda saman, bayan an cika shi da ammonia a ƙananan zafin jiki, ke fuskantar canjin zafin jiki, wanda ke haifar da gushewar ƙwayoyin bincike da kuma rarraba zafin jiki.
Ta hanyar nazarin adadi da/ko inganci na tsarin cirewar, ana iya samun bayanai kan kuzarin cirewar/sharar da adadin ammonia da ke sha a saman (ammonia). A matsayin wani sinadari na asali, ana iya amfani da ammonia a matsayin bincike don tantance sinadarin acid na saman. Waɗannan bayanai na iya taimakawa wajen fahimtar halayen catalytic na samfuran har ma da taimakawa wajen daidaita haɗakar sabbin tsarin. Maimakon amfani da na'urar gano TCD ta gargajiya, an yi amfani da na'urar auna ma'aunin quadrupole (Hiden HPR-20 QIC) a cikin aikin, wanda aka haɗa shi da na'urar gwaji ta hanyar capillary mai zafi.
Amfani da QMS yana ba mu damar bambance nau'ikan halittu daban-daban da aka cire daga saman ba tare da amfani da duk wani matattara na sinadarai ko na zahiri da tarko da ka iya yin illa ga binciken ba. Daidaitaccen saitin yuwuwar ionization na kayan aikin yana taimakawa hana rarrabuwar ƙwayoyin ruwa da kuma tsangwama da ke tattare da siginar ammonia m/z. An yi nazarin daidaito da amincin bayanan desorption na ammonia da aka tsara a zafin jiki ta amfani da ka'idojin nazari da gwaje-gwajen gwaji, suna nuna tasirin yanayin tattara bayanai, iskar gas mai ɗaukar kaya, girman barbashi, da yanayin reactor, wanda ke nuna sassaucin hanyar da aka yi amfani da ita.
Duk kayan da aka yi nazari a kansu suna da yanayin ATPD mai rikitarwa wanda ya mamaye kewayon 423-873K, ban da cerium, wanda ke nuna ƙananan kololuwar cirewar sinadarai waɗanda ke nuna ƙarancin acidity iri ɗaya. Bayanan adadi suna nuna bambance-bambance a cikin shan ammonia tsakanin sauran kayan da silica da fiye da tsari na girma. Tunda rarrabawar ATPD na cerium yana bin lanƙwasa na Gaussian ba tare da la'akari da rufe saman da ƙimar dumama ba, an bayyana halayen kayan da ake nazari a kansu a matsayin layi na ayyukan Gaussian guda huɗu da ke da alaƙa da haɗuwa da ƙungiyoyin wuraren matsakaici, rauni, ƙarfi, da ƙarfi sosai. Da zarar an tattara duk bayanai, an yi amfani da nazarin ƙirar ATPD don taimakawa wajen samun bayanai game da kuzarin sha na ƙwayar bincike a matsayin aikin kowane zafin cirewar sinadarai. Rarraba makamashi mai tarin yawa ta wurin wuri yana nuna waɗannan ƙimar acidity bisa ga matsakaicin ƙimar kuzari (a cikin kJ/mol) (misali rufe saman θ = 0.5).
A matsayin wani abu na bincike, an shanye propene daga isopropanol domin samun ƙarin bayani game da aikin kayan da ake nazari a kansu. Sakamakon da aka samu ya yi daidai da ma'aunin ATPD na baya dangane da ƙarfi da yawan wuraren acid na saman, kuma ya ba da damar bambance tsakanin wuraren acid na Brønsted da Lewis.
Hoto na 1. (Hagu) Rage girman bayanin martaba na ATPD ta amfani da aikin Gaussian (layin rawaya mai dige-dige yana wakiltar bayanin martaba da aka samar, dige-dige baƙi bayanai ne na gwaji) (dama) Aikin rarraba makamashin 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) “Kiyasin Gwaji na Hanyar Shakewar Zafin Ammoniya da Aka Shirya don Binciken Halayen Acid na Fasahohin Catalyst Iri-iri” Catalysis da Aka Yi Amfani da shi A: Bita 503, 227-236
Boye nazarin. (Fabrairu 9, 2022). Kimantawar gwaji na hanyar cire ammonia da aka tsara da zafin jiki don nazarin halayen acid na saman abubuwa daban-daban na abubuwan kara kuzari. AZ. An dawo da shi Satumba 7, 2023 daga https://www.azom.com/article.aspx?ArticleID=14016.
Ɓoye nazarin. "Kwajin Gwaji na Hanyar Cire Ammonia da aka Shirya da Zafin Jiki don Nazarin Halayen Acid na saman Catalyst Iri-iri". AZ. Satumba 7, 2023
Ɓoye nazarin. "Kwajin Gwaji na Hanyar Cire Ammonia da aka Shirya da Zafin Jiki don Nazarin Halayen Acid na saman Catalyst Iri-iri". AZ. https://www.azom.com/article.aspx?ArticleID=14016. (An shiga: Satumba 7, 2023).
Boye nazarin. 2022. Kimantawa ta gwaji na hanyar cire ammonia da aka tsara da zafin jiki don nazarin halayen acidic na saman abubuwan kara kuzari iri-iri. AZoM, an duba shi a ranar 7 ga Satumba, 2023, https://www.azom.com/article.aspx?ArticleID=14016.
Lokacin Saƙo: Satumba-07-2023
