chinotakura catalyst uye zeolite

Tinoshandisa makuki kuti tivandudze ruzivo rwenyu. Nekuramba muchitsvaga saiti ino, munobvuma kushandisa kwedu makuki. Ruzivo rwakawanda.
Chinyorwa chino chinotarisa pahunhu hweacidity hwe oxide catalysts uye supports (γ-Al2O3, CeO2, ZrO2, SiO2, TiO2, HZSM5 zeolite) uye kuenzanisa kuonekwa kwenzvimbo dzadzo nekuyera tembiricha-programmed ammonia desorption (ATPD). ATPD inzira yakavimbika uye iri nyore umo pamusoro, mushure mekuzara neammonia patembiricha yakaderera, unochinja tembiricha, izvo zvinotungamira mukubviswa kweprobe molecules pamwe nekugoverwa kwetembiricha.
Nekuongorora kwehuwandu uye/kana qualitative pattern yekubviswa kwemvura, ruzivo runogona kuwanikwa pamusoro pesimba rekubviswa kwemvura/kunyudzwa kwemvura uye huwandu hweammonia inonyudzwa pamusoro (ammonia uptake). Semorekuru yekutanga, ammonia inogona kushandiswa seprobe kuona acidity yenzvimbo. Data iri rinogona kubatsira kunzwisisa maitiro e catalytic emasampuli uye kutobatsira kugadzirisa kugadzirwa kwemasystem matsva. Panzvimbo pekushandisa TCD detector yechinyakare, quadrupole mass spectrometer (Hiden HPR-20 QIC) yakashandiswa mubasa iri, yakabatana nemudziyo wekuyedza kuburikidza ne capillary inopisa.
Kushandiswa kweQMS kunotibvumira kusiyanisa zviri nyore pakati pemhando dzakasiyana dzakabviswa pamusoro pasina kushandisa chero mafirita emakemikari kana epanyama uye misungo inogona kukanganisa kuongororwa. Kugadziriswa kwakakodzera kwesimba reionization remudziyo kunobatsira kudzivirira kupatsanurwa kwemamorekuru emvura uye kukanganiswa kunokonzerwa nechiratidzo cheammonia m/z. Kururama uye kuvimbika kwedata reammonia rakarongwa netembiricha kwakaongororwa uchishandisa zviyero zvedzidziso uye bvunzo dzekuedza, zvichiratidza mhedzisiro yemodhi yekuunganidza data, gasi rekutakura, saizi yezvikamu, uye geometry yereactor, zvichiratidza kuchinjika kwenzira yakashandiswa.
Zvinhu zvese zvakadzidzwa zvine maitiro akaomarara eATPD anotenderera 423-873K, kunze kwecerium, iyo inoratidza peaks dzakatetepa dzekubviswa kwemvura zvichiratidza acidity yakaderera zvakaenzana. Data rehuwandu rinoratidza musiyano mukutorwa kweammonia pakati pezvimwe zvinhu nesilica nehukuru hunopfuura hwakati wandei. Sezvo kugoverwa kweATPD kwecerium kunotevera Gaussian curve pasinei nekufukidzwa kwepamusoro uye kupisa, maitiro echinhu chiri kudzidzwa anotsanangurwa semutsara wemabasa mana eGaussian ane chekuita nekusanganiswa kwemapoka enzvimbo ane mwero, asina simba, akasimba, uye akasimba kwazvo. Kana data rese raunganidzwa, ongororo yeATPD modeling yakashandiswa kubatsira kuwana ruzivo nezve adsorption energy yeprobe molecule sebasa retembiricha yega yega yekubviswa kwemvura. Kugoverwa kwesimba kwakaunganidzwa nenzvimbo kunoratidza acidity inoenderana neavhareji yesimba (mu kJ/mol) (semuenzaniso surface coverage θ = 0.5).
Sekuita kwekuongorora, propene yakabviswa mvura mumuviri we isopropanol kuti iwane rumwe ruzivo nezve mashandiro ezvinhu zviri kudzidzwa. Zvakawanikwa zvaienderana nekuyerwa kweATPD kwakapfuura maererano nesimba uye kuwanda kwenzvimbo dzine acid yepamusoro, uye zvakaitawo kuti zvikwanisike kusiyanisa pakati penzvimbo dzine acid dzeBrønsted neLewis.
Mufananidzo 1. (Kuruboshwe) Kubviswa kwechimiro cheATPD uchishandisa basa reGaussian (mutsetse weyero une madotsi unomiririra chimiro chakagadzirwa, madotsi matema idata rekuyedza) (kurudyi) Basa rekugovera simba reAmmonia desorption panzvimbo dzakasiyana-siyana.
Roberto Di Cio Faculty of Engineering, University of Messina, Contrada Dee Dee, Sant'Agata, I-98166 Messina, Italy
Francesco Arena, Roberto Di Cio, Giuseppe Trunfio (2015) “Kuongororwa kweAmmonia Temperature-Programmed Desorption Method yekuongorora Hunhu hweAcid hweHeterogeneous Catalyst Surfaces” Applied Catalysis A: Review 503, 227-236
Viga ongororo. (Kukadzi 9, 2022). Kuongororwa kwekuyedza kwenzira yekubviswa kweammonia nehurongwa hwekupisa kuti tidzidze hunhu hweasidhi hwenzvimbo dzakasiyana dzema catalysts. AZ. Yakatorwa Gunyana 7, 2023 kubva ku https://www.azom.com/article.aspx?ArticleID=14016.
Viga ongororo. "Kuongororwa kwekuyedzwa kweNzira yeKubvisa Ammonia Yakarongwa Nekupisa Yekudzidza Hunhu hweAcid hweHeterogeneous Catalyst Surfaces". AZ. Gunyana 7, 2023 .
Viga ongororo. "Kuongororwa kweKuedza kweNzira yeKudonhedza Ammonia Yakarongwa neTemperature Yekudzidza Hunhu hweAcid hweHeterogeneous Catalyst Surfaces". AZ. https://www.azom.com/article.aspx?ArticleID=14016. (Yakasvikwa: Gunyana 7, 2023).
Viga ongororo. 2022. Kuongororwa kwekuyedza kwenzira yekudonhedza ammonia yakarongedzwa nekupisa yekudzidza hunhu hweasidhi hwenzvimbo dzakasiyana dze catalyst. AZoM, yakasvikwa musi wa7 Gunyana 2023, https://www.azom.com/article.aspx?ArticleID=14016.