Anyị na-eji kuki eme ka ahụmịhe gị ka mma. Site n'ịga n'ihu na-achọgharị na saịtị a, ị kwenyere na anyị na-eji kuki. Ozi ndị ọzọ.
Isiokwu a na-elekwasị anya na njirimara acidity elu nke ihe na-akpali akpali na ihe nkwado oxide (γ-Al2O3, CeO2, ZrO2, SiO2, TiO2, HZSM5 zeolite) na nchọpụta ntụnyere nke elu ha site na ịtụ ammonia desorption nke okpomọkụ (ATPD) nke etinyere na nhazi okpomọkụ. ATPD bụ ụzọ a pụrụ ịtụkwasị obi ma dị mfe ebe elu ahụ, mgbe ejiri ammonia jupụta ya na obere okpomọkụ, na-agbanwe okpomọkụ, nke na-eduga na mwepụ nke molekul probe yana nkesa okpomọkụ.
Site na nyocha ọnụọgụgụ na/ma ọ bụ nke njirimara nke usoro mwepụ, enwere ike inweta ozi gbasara ike nke mwepụ/ịmịpụta na ọnụọgụ ammonia a na-etinye n'elu (ịnweta ammonia). Dịka molekul bụ isi, enwere ike iji ammonia dị ka nyocha iji chọpụta acidity nke elu. Data ndị a nwere ike inyere aka ịghọta omume catalytic nke ihe nlele ahụ ma nye aka ịhazi njikọta nke sistemụ ọhụrụ. Kama iji ihe nchọpụta TCD ọdịnala, ejiri ihe nlele mass quadrupole (Hiden HPR-20 QIC) mee ihe n'ọrụ ahụ, nke ejikọtara na ngwaọrụ nnwale site na capillary ọkụ.
Ojiji nke QMS na-enye anyị ohere ịmata ọdịiche dị n'etiti ụdị dị iche iche a gbapụrụ n'elu na-ejighị ihe nzacha kemịkalụ ma ọ bụ anụ ahụ na ọnyà ndị nwere ike imetụta nyocha ahụ n'ụzọ dị njọ. Nhazi kwesịrị ekwesị nke ikike ionization nke ngwa ahụ na-enyere aka igbochi nkewa nke molekul mmiri na nnyonye anya sitere na mgbaàmà ammonia m/z. E jiri njirisi echiche na nnwale nnwale nyochaa izi ezi na ntụkwasị obi nke data mwepụ ammonia nke a haziri maka okpomọkụ, na-egosipụta mmetụta nke ụdị nchịkọta data, gas na-ebu ibu, nha ihe, na geometry reactor, na-egosi mgbanwe nke usoro ejiri.
Ihe niile a mụrụ nwere ụdị ATPD dị mgbagwoju anya nke na-agafe oke 423-873K, ewezuga cerium, nke na-egosi oke mkpofu dị warara nke na-egosi obere acidity. Data ọnụọgụgụ na-egosi ọdịiche dị na nnabata ammonia n'etiti ihe ndị ọzọ na silica site na ihe karịrị usoro nha. Ebe ọ bụ na nkesa ATPD nke cerium na-eso usoro Gaussian n'agbanyeghị mkpuchi elu na ọnụego ọkụ, a na-akọwa omume nke ihe a na-amụ dị ka usoro nke ọrụ Gaussian anọ jikọtara ya na njikọta nke otu saịtị dị mfe, adịghị ike, siri ike, na nke siri ike. Ozugbo anakọtachara data niile, etinyere nyocha ihe nlereanya ATPD iji nyere aka nweta ozi na ike adsorption nke molekul nyocha dị ka ọrụ nke okpomọkụ mkpofu ọ bụla. Nkesa ike mkpokọta site na ọnọdụ na-egosi ụkpụrụ acidity ndị a dabere na nkezi uru ike (na kJ/mol) (dịka mkpuchi elu θ = 0.5).
Dịka mmeghachi omume nyocha, a kpọnwụrụ propene site na isopropanol iji nweta ozi ndị ọzọ gbasara ọrụ nke ihe ndị a na-amụ. Nsonaazụ ndị e nwetara kwekọrọ na nha ATPD gara aga n'ihe gbasara ike na oke nke ebe acid dị n'elu, ma meekwa ka o kwe omume ịmata ọdịiche dị n'etiti ebe acid Brønsted na Lewis.
Foto nke 1. (N'aka ekpe) Mwepụ nke profaịlụ ATPD site na iji ọrụ Gaussian (ahịrị ntụpọ odo na-anọchite anya profaịlụ emepụtara, ntụpọ ojii bụ data nnwale) (n'aka nri) Ọrụ nkesa ike mwepụ nke amonia n'ebe dị iche iche.
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) “Nyocha nnwale nke usoro mwepụ okpomọkụ Amonia nke a haziri maka inyocha njirimara Acid nke elu Catalyst dị iche iche” Ejiri Catalysis A mee ihe: Nyocha 503, 227-236
Zoo nyocha. (Febụwarị 9, 2022). Nyocha nnwale nke usoro nke iwepụ ammonia nke a na-eme n'ọnọdụ okpomọkụ iji mụọ ihe ndị dị na acid nke elu dị iche iche nke ihe na-akpalite ihe. AZ. E wetara ya na Septemba 7, 2023 site na https://www.azom.com/article.aspx?ArticleID=14016.
Zoo nyocha. "Nyocha nnwale nke usoro mwepụ ammonia nke okpomọkụ maka ịmụ banyere njirimara asịd nke elu ihe na-akpali akpali dị iche iche". AZ. Septemba 7, 2023
Zoo nyocha. "Nyocha nnwale nke usoro mwepụ ammonia nke okpomọkụ maka ịmụ banyere njirimara asịd nke elu ihe na-akpali akpali dị iche iche". AZ. https://www.azom.com/article.aspx?ArticleID=14016. (Enwetara: Septemba 7, 2023).
Zoo nyocha. 2022. Nyocha nnwale nke usoro mwepụ ammonia nke e mere maka okpomọkụ maka ịmụ ihe ndị bụ isi nke elu ihe na-akpali akpali dị iche iche. AZoM, enwetara na Septemba 7, 2023, https://www.azom.com/article.aspx?ArticleID=14016.
Oge ozi: Sep-07-2023
