mea lawe catalyst a me ka zeolite

Hoʻohana mākou i nā kuki e hoʻomaikaʻi i kou ʻike. Ma ka hoʻomau ʻana e nānā i kēia pūnaewele, ʻae ʻoe i kā mākou hoʻohana ʻana i nā kuki. ʻIke hou aku.
Ke nānā nei kēia ʻatikala i nā waiwai acidity o ka ʻili o nā mea hoʻouluulu oxide a me nā kākoʻo (γ-Al2O3, CeO2, ZrO2, SiO2, TiO2, HZSM5 zeolite) a me ka ʻike hoʻohālikelike ʻana o ko lākou mau ʻili ma ke ana ʻana i ka desorption ammonia i hoʻolālā ʻia i ka mahana (ATPD). He ʻano hilinaʻi a maʻalahi hoʻi ka ATPD kahi e loli ai ka mahana o ka ʻili, ma hope o ka hoʻopiha ʻia ʻana me ka ammonia ma ka mahana haʻahaʻa, kahi e alakaʻi ai i ka desorption o nā molekala probe a me ka hoʻolaha mahana.
Ma o ka loiloi quantitative a/a i ʻole qualitative o ke ʻano desorption, hiki ke loaʻa ka ʻike e pili ana i ka ikehu o ka desorption/adsorption a me ka nui o ka ammonia i adsorbed ma luna o ka ʻili (ammonia uptake). Ma ke ʻano he mole kumu, hiki ke hoʻohana ʻia ka ammonia ma ke ʻano he probe e hoʻoholo ai i ka acidity o kahi ʻili. Hiki i kēia ʻikepili ke kōkua i ka hoʻomaopopo ʻana i ke ʻano catalytic o nā laʻana a kōkua pū i ka hoʻomaikaʻi ʻana i ka synthesis o nā ʻōnaehana hou. Ma kahi o ka hoʻohana ʻana i kahi mea ʻike TCD kuʻuna, ua hoʻohana ʻia kahi spectrometer mass quadrupole (Hiden HPR-20 QIC) i ka hana, i hoʻopili ʻia i ka hāmeʻa hoʻāʻo ma o kahi capillary wela.
ʻO ka hoʻohana ʻana o QMS e hiki ai iā mākou ke hoʻokaʻawale maʻalahi ma waena o nā ʻano like ʻole i hoʻohemo ʻia mai ka ʻili me ka ʻole o ka hoʻohana ʻana i nā kānana kemika a kino paha a me nā pahele e hiki ke hoʻopilikia maikaʻi ʻole i ka nānā ʻana. ʻO ka hoʻonohonoho kūpono ʻana o ka hiki ke ionization o ka mea hana e kōkua i ka pale ʻana i ka ʻāpana o nā mole wai a me ka hopena o ka hoʻopilikia ʻana me ka hōʻailona ammonia m/z. Ua kālailai ʻia ka pololei a me ka hilinaʻi o ka ʻikepili desorption ammonia i hoʻolālā ʻia i ka mahana me ka hoʻohana ʻana i nā pae hoʻohālikelike a me nā hoʻokolohua hoʻokolohua, e hōʻike ana i nā hopena o ke ʻano hōʻiliʻili ʻikepili, ke kinoea lawe, ka nui o ka ʻāpana, a me ke ʻano o ka reactor, e hōʻike ana i ka maʻalahi o ke ʻano i hoʻohana ʻia.
Loaʻa i nā mea āpau i aʻo ʻia nā ʻano ATPD paʻakikī e uhi ana i ka pae 423-873K, koe wale nō ka cerium, kahi e hōʻike ana i nā piko desorption haiki i hoʻonā ʻia e hōʻike ana i ka acidity haʻahaʻa like. Hōʻike ka ʻikepili helu i nā ʻokoʻa i ka lawe ʻana o ka ammonia ma waena o nā mea ʻē aʻe a me ka silica ma mua o kahi kauoha o ka nui. ʻOiai ʻo ka hoʻolaha ʻana o ka ATPD o ka cerium e hahai ana i kahi piʻo Gaussian me ka nānā ʻole i ka uhi ʻana o ka ʻili a me ka wikiwiki o ka hoʻomehana ʻana, ua wehewehe ʻia ke ʻano o ka mea ma lalo o ke aʻo ʻana he linearity o ʻehā mau hana Gaussian e pili ana me ka hui pū ʻana o nā hui pūnaewele waena, nāwaliwali, ikaika, a ikaika loa. I ka hōʻiliʻili ʻana o nā ʻikepili āpau, ua hoʻopili ʻia ka loiloi hoʻohālike ATPD e kōkua i ka loaʻa ʻana o ka ʻike ma ka ikehu adsorption o ka molekole probe ma ke ʻano he hana o kēlā me kēia mahana desorption. Hōʻike ka hoʻolaha ikehu cumulative ma kahi i nā waiwai acidity e pili ana i nā waiwai ikehu awelika (ma kJ/mol) (e laʻa me ka uhi ʻana o ka ʻili θ = 0.5).
Ma ke ʻano he hopena probe, ua hoʻokomo ʻia ka propene i ka dehydration o ka isopropanol e loaʻa ai ka ʻike hou aku e pili ana i ka hana o nā mea i aʻo ʻia. Ua kūlike nā hopena i loaʻa me nā ana ATPD ma mua e pili ana i ka ikaika a me ka nui o nā wahi waikawa o ka ʻili, a ua hiki nō hoʻi ke hoʻokaʻawale ma waena o nā wahi waikawa Brønsted a me Lewis.
Kiʻi 1. (Hema) Wehewehe ʻana o ka ʻikepili ATPD me ka hoʻohana ʻana i kahi hana Gaussian (hōʻike ka laina kiko melemele i ka ʻikepili i hana ʻia, ʻo nā kiko ʻeleʻele he ʻikepili hoʻokolohua) (ʻākau) Hana hoʻolaha ikehu desorption ammonia ma nā wahi like ʻole.
ʻO Roberto Di Cio Faculty of Engineering, University of Messina, Contrada Dee Dee, SantʻAgata, I-98166 Messina, Italia
ʻO Francesco Arena, Roberto Di Cio, Giuseppe Trunfio (2015) "Loiloi Hoʻokolohua o ke ʻAno Desorption i hoʻolālā ʻia no ka mahana o Ammonia no ka noiʻi ʻana i nā waiwai waikawa o nā ʻili Catalyst Heterogeneous" Applied Catalysis A: Review 503, 227-236
Hūnā i nā ʻikepili. (Pepeluali 9, 2022). Loiloi hoʻokolohua o ke ʻano o ka desorption i hoʻolālā ʻia e ka mahana o ka ammonia e aʻo ai i nā waiwai waikawa o nā ʻili heterogeneous o nā catalysts. AZ. Loaʻa ʻia Kepakemapa 7, 2023 mai https://www.azom.com/article.aspx?ArticleID=14016.
Hūnā i nā ʻikepili. "Loiloi hoʻokolohua o kahi ʻano hana hoʻohemo ʻana o ka Ammonia i hoʻolālā ʻia no ke aʻo ʻana i nā waiwai waikawa o nā ʻili catalyst Heterogeneous". AZ. Kepakemapa 7, 2023 .
Hūnā i nā ʻikepili. "Loiloi Hoʻokolohua o ke ʻAno Hoʻohemo ʻAmonia i Hoʻolālā ʻia i ka Mahana no ke Aʻo ʻana i nā Waiwai Waikawa o nā ʻIli Catalyst Heterogeneous". AZ. https://www.azom.com/article.aspx?ArticleID=14016. (Loaʻa ʻia: Kepakemapa 7, 2023).
Hūnā i nā ʻikepili. 2022. Loiloi hoʻokolohua o kahi ʻano hana hoʻohemo ammonia i hoʻolālā ʻia i ka mahana no ke aʻo ʻana i nā waiwai waikawa o nā ʻili catalyst heterogeneous. AZoM, i komo ʻia ma 7 Kepakemapa 2023, https://www.azom.com/article.aspx?ArticleID=14016.