Glycol assisted efficient conversion of CO2 captured from air to methanol with a heterogeneous Cu/ZnO/Al2O3 catalyst

Recent advances in direct air capture by adsorption

“…This design was later used to assess the cost and efficiency of wind power in the MeOH system. 71 Sen et al 223,548,549 developed a one-pot DAC-MeOH system using alkali hydroxide in ethylene glycol for CO 2 capture from air and subsequent in situ conversion to methanol through Ru-PNP catalysts. In an integrated single-tank system, such a process proceeds at mild temperatures (100–140 °C) and yields 60% MeOH conversion rate.…”

“…Unfortunately, dehydrogenation of ethylene glycol and the formation of carboxylates were observed. A later work 549 investigated the glycol solvent-assisted conversion of CO 2 and H 2 to MeOH using a Cu/ZnO/Al 2 O 3 catalyst. The use of non-noble metal-based catalysts is advantageous for commercial applications.…”

Homogeneous Hydrogenation of CO2 and CO to Methanol: The Renaissance of Low‐Temperature Catalysis in the Context of the Methanol Economy

“…For example, the indirect CO 2 ‐to‐methanol systems demonstrated using molecular catalysts have been successfully translated with heterogeneous catalysts. Recent studies, independently by the groups of Heldebrant and Prakash, showed that amine‐ and alcohol‐mediated processes can enable hydrogenation of CO 2 as well as its derivatives to methanol using the commercial Cu/ZnO/Al 2 O 3 catalyst at much lower temperatures (140–200 °C) with up to 90 % conversion, which is rarely accomplished under conventional heterogeneous setups [215–219] . Hence, homogeneous catalysis has long‐term value as a go‐to tool to discover and test novel processes for methanol synthesis rapidly at small scales using easy‐to‐operate setups.…”

“…Recent studies, independently by the groups of Heldebrant and Prakash, showed that amine‐ and alcohol‐mediated processes can enable hydrogenation of CO 2 as well as its derivatives to methanol using the commercial Cu/ZnO/Al 2 O 3 catalyst at much lower temperatures (140–200 °C) with up to 90 % conversion, which is rarely accomplished under conventional heterogeneous setups. [ 215 , 216 , 217 , 218 , 219 ] Hence, homogeneous catalysis has long‐term value as a go‐to tool to discover and test novel processes for methanol synthesis rapidly at small scales using easy‐to‐operate setups. To date, all the homogeneous methanol synthesis investigations have been studied under batch conditions and at extremely small scales.…”

Homogeneous Hydrogenation of CO2 and CO to Methanol: The Renaissance of Low‐Temperature Catalysis in the Context of the Methanol Economy

“…For example, the indirect CO 2 ‐to‐methanol systems demonstrated using molecular catalysts have been successfully translated with heterogeneous catalysts. Recent studies, independently by the groups of Heldebrant and Prakash, showed that amine‐ and alcohol‐mediated processes can enable hydrogenation of CO 2 as well as its derivatives to methanol using the commercial Cu/ZnO/Al 2 O 3 catalyst at much lower temperatures (140–200 °C) with up to 90 % conversion, which is rarely accomplished under conventional heterogeneous setups [215–219] . Hence, homogeneous catalysis has long‐term value as a go‐to tool to discover and test novel processes for methanol synthesis rapidly at small scales using easy‐to‐operate setups. To date, all the homogeneous methanol synthesis investigations have been studied under batch conditions and at extremely small scales.…”