I roto i ngā tukanga ahumahi katoa o te whakaputa hau hiko, he mea nui te whakamahi i te ahunga whakamua o te tauhohenga nekehanga hau wai hei huri i te CO2 hei hauwai.
He tauhohenga wera-whakamuri tēnei tauhohenga. Ka teitei ake te pāmahana, ka iti iho te huringa taurite e rite ana. I taua wā anō, he tauhohenga whakatere noa tēnei tauhohenga. Ina kore he whakatere, he uaua ki te tauhohe i te 700. I te aroaro o te whakatere, ka tino heke te pāmahana tauhohenga. Ina whakamahia te whakatere nekehanga pāmahana teitei, ko te pāmahana tauhohenga he 300 ~ 500 °C; Ina whakamahia te whakatere nekehanga pāmahana iti, ko te pāmahana tauhohenga he 200-400 °C (ripanga 22). Nā te mea he tauhohenga isomolecular te tauhohenga, kāore he pānga o te pēhanga ki te taurite tauhohenga, engari ka taea e te mahi pēhanga te whakapai ake i te kaha whakaputa me te tere tauhohenga.
I te wāhanga tuatahi o te tauhohenga, kei tawhiti te tukanga i te rohe taurite, ā, kei te whakahaerehia e te kinetics. Mā te whakanui ake i te pāmahana ka taea te whakapai ake i te tere tauhohenga me te whakapai ake i te whai huatanga o te tukanga. I te wāhanga o muri mai o te tauhohenga, ka whakawhāitihia te huringa o te tukanga e te taurite thermodynamic. He iti noa te huringa taurite thermodynamic i te pāmahana teitei. Nō reira, i te wāhanga o muri mai o te tauhohenga, me whakamahi te mahi pāmahana iti hei whakapai ake i te huringa CO. Ko ngā āhuatanga thermodynamic me te kinetics o te tukanga e whakatau ana me whakamahi te tukanga huringa CO i te mahi pāmahana rerekē.
I te wāhanga tuatahi o te tauhohenga, kei tawhiti te tukanga i te rohe taurite, ā, kei te whakahaerehia e te kinetics. Mā te whakanui ake i te pāmahana ka taea te whakapai ake i te tere tauhohenga me te whakapai ake i te whai huatanga o te tukanga. I te wāhanga o muri mai o te tauhohenga, ka whakawhāitihia te huringa o te tukanga e te taurite thermodynamic. He iti noa te huringa taurite thermodynamic i te pāmahana teitei. Nō reira, i te wāhanga o muri mai o te tauhohenga, me whakamahi te mahi pāmahana iti hei whakapai ake i te huringa CO. Ko ngā āhuatanga thermodynamic me te kinetics o te tukanga e whakatau ana me whakamahi te tukanga huringa CO i te mahi pāmahana rerekē.
Nā te herenga o te taurite tauhohenga, ahakoa ka hurihia te CO i muri i te huringa hau wai pāmahana iti, kei te tata tonu ki te 1% te nui o tōna ihirangi, kāore e taea te whakatutuki i ngā whakaritenga whakamahinga o ngā tukanga maha i muri mai. I roto i te ahumahi, ka tangohia i te nuinga o te wā mā roto i ētahi tauhohenga matū. Mā te waikura whiriwhiri o te CO me te O2 i te aroaro o te nui o te hauwai ka puta te CO2, ā, he ngāwari hoki te tauhohenga o te hauwai me te O2. Nō reira, ko te tukanga e whakawhirinaki ana ki te pāmahana tauhohenga me te momo whakakorikori [29301].
Ko tētahi atu tukanga ahumahi ko te whakahauwai i te CO me te nui o te hauwai o nāianei ki runga i te whakakorikori e ahu mai ana i te nikara hei whakaputa i te methane.
I muri i te whakawhiti hau wai me te tango CO, ka huri ngā wāhanga matua o te hau hei H2 me te CO2. I roto i te umanga haukini hangai, me wehe tuatahi te CO2. Ka taea tonu e ēnei CO2 te tauhohe ki te haukini i hangaia e te hauwai i te wāhanga e whai ake nei hei whakaputa i te haukini paikāpōnate, te haukini kāpōnate, te urea me ētahi atu maniua matū hei whakatutuki i te whakamahinga nui o te CO2. I roto i tēnei tukanga, ko te hangarau wehewehe o te CO2 me te H2 ko te whakarite kia taea te hangarua te CO2.
Mō ngā tono hauwai pērā i ngā pūtau wahie kiriuhi proton, ko te hauwai anake ka whakamahia hei utu mō te CO2. Ka kore e whai hua ngā tukunga CO2, ā, me honoa pea ki ētahi atu tukanga whakapūhui kohuke (pērā i te hanga konupūmā kāponāte kounga kai).
Heoi, i roto i ngā tukanga katoa o te wehenga CO2, he huarahi pai ake te whakamahi i te amine waro, te methanol rānei hei mimiti i te CO2. Ina koa i roto i te tukanga mimiti CO2 e te methanol i te pāmahana iti, ka piki ake te wairewatanga o ngā hau maha i te pāmahana iti. Ko te wairewatanga o te hauwai anake kāore e herea e te pāmahana, ā, ki te iti te pāmahana, ka iti ake te wairewatanga. E whakaatu ana i te whiriwhiri pai mō te wehenga H2.
I roto i te tukanga whakaora i te CO2, i runga i te whakaaro kia kore ai e kino te hua hauwai, me karo i te whakamahi i ngā matū utu nui (pēnei i te houra tunutunu) ka taea te hono kaha ki te CO, kia pai ai te penapena o te tukanga.
Wā tuku: Hakihea-10-2021