Ịghọta Adsorption na Ngwa Ya
Pendahuluan
Adsorption bụ ihe dị oke mkpa na kemistri nke nwere ọtụtụ ojiji bara uru. Okwu a na-ezo aka na usoro nke molekul nke ihe, ma ọ bụ n'ọnọdụ gas ma ọ bụ mmiri mmiri, na-arapara n'elu ihe siri ike ma ọ bụ ihe ọzọ. Adsorption dị iche na absorption, nke a na-etinye molekul kpamkpam n'ime olu siri ike ma ọ bụ mmiri mmiri. N'isiokwu a, anyị ga-eleba anya nke ọma n'otú e si akọwa adsorption, ụdị ya, usoro ya, na ojiji bara uru nke usoro a.
Ịghọta Adsorption
Adsorption sitere na okwu ndị bụ "ad-" nke pụtara "on" na "sorption" nke pụtara "absorption." N'ikwu ya n'ụzọ dị mfe, adsorption bụ usoro nke atọm, ion, ma ọ bụ molekul nke ihe ụfọdụ (adsorbate) ji ejide elu nke ihe siri ike ma ọ bụ mmiri mmiri (adsorbent). Ọ bụ ihe dị n'elu ebe mmekọrịta bụ isi dị n'etiti elu adsorbent na molekul adsorbate.
A na-ekewa adsorption n'ime ụdị abụọ dabere na ike dị n'etiti adsorbent na adsorbate:
1. Physisorption (Mgbapụta Ahụ): Nke a bụ ụdị mmịpụta nke na-eme n'okpomọkụ dị ala ma na-agụnye ike anụ ahụ Van der Waals. Usoro a nwere ike ịgbanwe agbanwe, nke pụtara na enwere ike iwepụ adsorbate ahụ site na mgbanwe na okpomọkụ ma ọ bụ nrụgide.
2. Kemisorption (Kemikal Adsorption): Nke a bụ ụdị adsorption nke gụnyere ịmepụta njikọ kemịkalụ n'etiti adsorbate na adsorbent. Usoro a na-emekarị n'oge okpomọkụ dị elu ma a naghị agbanwe agbanwe.
Usoro Adsorption
E nwere ọtụtụ usoro na usoro absorption:
1. Mgbasa Oke: Mkpụrụ ndụ ihe nketa na-esi na gas ma ọ bụ usoro ngwọta gaa n'elu ihe na-eme ka ihe na-eme ka ihe na-eme ka ihe na-eme ka ihe na-eme ka ihe ghara ịdị mma.
2. Micro-Diffusion: Mkpụrụ ndụ adsorbate na-abanye n'ime obere oghere ma ọ bụ mgbawa n'elu ihe na-amịkọrọ mmiri.
3. Nha nhata: Mkpụrụ ndụ ihe nketa ndị na-eme ka ihe dị n'ime mmiri na-arapara n'elu ihe na-eme ka ihe dị n'ime mmiri ahụ dị nro, mgbe ike ihe nketa ahụ jupụtachara nke ọma, usoro ahụ na-eru nha nha nke ihe na-eme ka ihe dị n'ime mmiri dị nro.
Isotherm adsorption
Isotherm adsorption bụ eserese nke na-egosi mmekọrịta dị n'etiti ọnụọgụ adsorbate nke onye na-amịkọrọ mmiri na-amịkọrọ n'elu ala n'okpuru ọnọdụ nguzozi, gbasara nrụgide (n'ihe gbasara gas) ma ọ bụ nguzozi (n'ihe gbasara mmiri mmiri). Ụfọdụ ụdị isotherm adsorption a ma ama gụnyere:
1. Isotherm Langmuir: Ụdị a dabere na echiche na elu ihe na-amịkọrọ ihe nwere ebe a na-amịkọrọ ihe n'otu ebe, ebe ọ bụla nwere ike ịnọ naanị otu molekul adsorbate. Isotherm Langmuir dị mma iji kọwaa kemisorption.
2. Freundlich isotherm: Ụdị a dabara adaba maka adsorption na elu dị iche iche, ebe ebe adsorption enweghị otu ike ahụ. Isotherm a dabara adaba maka ịkọwa physisorption.
Ngwa Adsorption
Adsorption nwere ọtụtụ ojiji bara uru n'ọtụtụ ụlọ ọrụ na ngalaba nyocha. Lee ụfọdụ n'ime ngwa ndị bụ isi nke adsorption:
1. Ọgwụgwọ Mmiri na Ihe Mkpofu
A na-ejikarị adsorption eme ihe n'ịgwọ mmiri iji wepụ ihe ndị na-emerụ emerụ dịka ọla dị arọ, ihe ndị sitere n'okike, na agba. A na-ejikarị adsorbents dị ka carbon na zeolites eme ihe n'usoro a. Nke a na-enyere aka ime ka mma mmiri dị mma ma mee ka ọ dabara adaba maka oriri mmadụ ma ọ bụ ọrụ ụlọ ọrụ mmepụta ihe.
2. Ụlọ ọrụ ọgwụ
N'ụlọ ọrụ ọgwụ, a na-eji adsorption eme ihe n'usoro nhicha ọgwụ na ịmepụta mwepụta a na-achịkwa nke ihe ndị na-arụ ọrụ site na usoro ọgwụ. Dịka ọmụmaatụ, a na-eji carbon arụ ọrụ ejikọta ma wepụ nsí na eriri afọ, ebe sistemụ nnyefe ọgwụ dabere na adsorption na-enyere aka na mwepụta a na-achịkwa nke ihe ndị na-arụ ọrụ.
3. Njikwa Mmetọ Ikuku
A na-ejikwa adsorption achịkwa mwepụta nke gas na ihe ndị na-emerụ emerụ sitere na ụlọ ọrụ na ụgbọala. A na-eji adsorbents dị ka zeolites na carbon activated wepụ gas ndị na-emerụ emerụ dịka SO₂, NOₓ, na VOCs (Volatile Organic Compounds) n'ikuku, si otú a na-ebelata mmetọ ikuku.
4. Ụlọ ọrụ nri na ihe ọṅụṅụ
N'ụlọ ọrụ nri na ihe ọṅụṅụ, a na-eji adsorption eme ihe maka ịsacha, kewapụ, na nzacha nke ihe ndị mejupụtara ya. Dịka ọmụmaatụ, a na-eji carbon eme ihe iji wepụ agba, isi, na ihe ndị na-emerụ emerụ sitere na ngwaahịa nri na ihe ọṅụṅụ, dị ka shuga, mmanụ esi nri, na ihe ọṅụṅụ na-aba n'anya.
5. Mmepụta na Nchekwa Gas
N'ime ụlọ ọrụ gas, a na-eji adsorption eme ihe n'usoro nkewa na nhicha gas. Dịka ọmụmaatụ, n'ime mmepụta gas hydrogen, a na-eji usoro Pressure Swing Adsorption (PSA) kewapụ hydrogen na ngwakọta gas. Na mgbakwunye, a na-eji adsorbents echekwa gas n'enweghị nsogbu na nke ọma.
6. Nchịkọta Catalysis na Chemical
Mkpọsa mmiri na-abụkarị nzọụkwụ mbụ n'ime mmeghachi omume catalytic, ebe ihe mkpali na-enye elu maka molekul reactant iji jikọọ ma mekọrịta. Usoro a nwere ike ime ka ọsọ nke mmeghachi omume kemịkalụ na nhọrọ ya dịkwuo elu na ngwaahịa achọrọ. Ihe atụ nke ojiji a bụ usoro mmepụta ammonia na ụlọ ọrụ fatịlaịza.
7. Nhicha Mmanụ Nwụfu
A na-ejikwa adsorption eme ihe n'usoro nhicha mmanụ mmiri. A na-eji ihe dị iche iche na-amịkọrọ mmanụ, dị ka eriri eke na nke sịntetik, iji na-amịkọrọ mmanụ n'elu mmiri, na-enyere aka belata mmetụta gburugburu ebe obibi nke mmiri ahụ.
8. Ngwa na Teknụzụ Nano
Na teknụzụ nano, a na-eji ihe ndị dị ka nanocarbon na nanosilica eme ihe dị ka ihe na-eme ka ihe dị nro n'ihi nnukwu ebe ha dị n'elu. Nke a na-enye uru na ngwa dịka ihe mmetụta, nchekwa ike, na nnyefe ọgwụ.
Mmechi
Ịdọpụ uche bụ ihe dị mkpa nke na-arụ ọrụ dị oke mkpa n'ọtụtụ ngwa ụlọ ọrụ na nyocha. Nghọta zuru oke nke usoro na ụdị nke ịdọpụ uche na-enye anyị ohere iji usoro a nke ọma n'ọtụtụ ngalaba dị iche iche, site na ọgwụgwọ mmiri ruo na ụlọ ọrụ ọgwụ na njikwa mmetọ. Site na mmepe na nyocha teknụzụ na-aga n'ihu, anyị nwere ike ịtụ anya mmụba arụmọrụ na ihe ọhụrụ na ngwa ịdọpụ uche n'ọdịnihu.
