Ɔkwan a Wɔfa so Yɛ Nnuru a Wɔde Fa Nneɛma Mu
Nnuru a wɔde twetwe carbon dioxide no de nnuru a ɛda nnuru a wɔde yɛ nneɛma ne carbon dioxide ntam no di dwuma de tetew carbon dioxide fi mframa a wɔde fi mframa mu mu. Ɛkyere CO2 denam nnuru bi a wɔde yɛ nneɛma bi a ɛde di dwuma de ne CO2 yɛ adwuma ma ɛyɛ nneɛma a wɔde afrafra no so. Ɛfata ma dwumadie a CO2 dodoɔ/nhyɛsoɔ fã bi sua, te sɛ flue gas a wɔkyere wɔ fango-afiri a wɔde yɛ anyinam ahoɔden, semɛnte adwumayɛbea, ne dadeɛ adwumayɛbea. Saa kwan yi ho akokwaw kakra, na wɔayɛ mfiridwuma mu ɔyɛkyerɛ ahorow dedaw, ɛwom sɛ nnwinnade no kɛse sua de.
Nipadua mu Absorption Ɔkwan a Wɔfa so Yɛ
Physical absorption capture de su a ɛne sɛ physical solvents binom wɔ solubility a ɛkorɔn kɛse ma carbon dioxide sen nneɛma afoforo a ɛwɔ flue gas no mu no di dwuma na ama wɔatumi atete carbon dioxide afi nneɛma afoforo mu. Nneɛma a wɔde kyere nneɛma a wɔde honam fam nneɛma a wɔde yɛ nneɛma di dwuma titiriw no gu akuw abien mu: biako de polyethylene glycol dimethyl ether di dwuma sɛ ade a wɔde kyere nneɛma, a akwan a wɔtaa fa so no bi ne Selexol nhyehyɛe a Union Carbide yɛe ne NHD nhyehyɛe a Nanjing Nnuruyɛ Nnwuma Nhwehwɛmu Asoɛe a ɛwɔ me man mu no yɛe ɔfoforo no de methanol di dwuma sɛ ade a wɔde kyere nneɛma, a adeyɛ a wɔtaa yɛ ne Rectisol low-temperature methanol wash process a Linde ne Lurgi abom ayɛ wɔ Germany.
Physicochemical Nneɛma a Wɔtwetwe
Sɛ nnuru ne abɔde mu nneɛma a wɔde kyere nneɛma nkutoo da nkyɛn a, nnwumakuw binom ayɛ akwan a wɔfa so kyere nneɛma a wɔde nneɛma a wɔadi afra a ɛka nnuru ne nneɛma a wɔde yɛ nneɛma bom di dwuma. Eyi de adwumayɛ mu mfaso a ɛwɔ akwan abien no nyinaa so di dwuma na wonim no sɛ physicochemical absorption capture.
Novel Capture Mfiridwuma
A. Adsorption Ntetewmu Mfiridwuma
Adsorption separation technology de nsonsonoeɛ a ɛwɔ twetwe a ɛda mmeaeɛ a ɛyɛ nnam wɔ adsorbent no ani ne gas molecule ahodoɔ ntam di dwuma de tetew gas afã ahodoɔ mu. Mpɛn pii no, tumi a adsorbent tumi di mframa ho dwuma no fa ne soro fã pɔtee no ho; dodow a asase no ani fã pɔtee no sõ no, dodow no ara na gas a wɔde di dwuma no mu yɛ den. Enti, mpɛn pii no, adsorbents yɛ nneɛma a ɛwɔ porous. Nneɛma a wɔtaa de hyɛ mu ne molecule sieves, activated carbon, silica gel, ne activated alumina, anaasɛ adsorbents abien anaa nea ɛboro saa a wɔaka abom. Nhwehwɛmu kyerɛ sɛ esiane sɛnea carbon dioxide molecule spatial structure ne polarity wɔ awosu mu nti, adsorbents dodow no ara wɔ adsorption tumi kɛse ma carbon dioxide sen mframa afoforo te sɛ methane, carbon monoxide, hydrogen, ne nitrogen. Enti, wobetumi de adsorbents dodow no ara adi dwuma de apaapae carbon dioxide mu.
B. Adsorption Ntetewmu Mfiridwuma
Membrane separation yɛ ɔkwan a wɔfa so kyere carbon dioxide a wɔde gas afã horow a ɛwɔ membrane nneɛma bi mu no permeation rates ahorow di dwuma. Mfiridwuma a wɔde yiyi membrane mu titiriw ne sɛ wobehu membrane nneɛma a ɛwɔ tumi a wɔpaw sɛ ɛbɛfa mframa mu nneɛma ahorow mu; eyinom taa yɛ semi-permeable, ɛnyɛ-porous membranes. Mframa a ɛkɔ ntini no mu no di dissolution-diffusion mechanism akyi: gas molecules a wɔagye wɔ membrane no fã biako no pete na ɛtrɛw kɔ membrane no mu wɔ nkɛntɛnso a ɛwɔ concentration gradient no so, afei desorb fi ɔfã foforo no. Esiane sɛ mframa ahorow wɔ dissolution-diffusion rates soronko wɔ membrane no mu nti, wobetumi ayɛ gas afã horow a wɔpaapae mu.