CO2 hydrogenation to formic acid over heterogenized ruthenium catalysts using a fixed bed reactor with separation units
| Autor: | Gunniya Hariyanandam Gunasekar, Sungho Yoon, Hongjin Park, Kiyoung Park, Samhwan Kim, Seong-Hoon Kim, Kwang-Deog Jung, KwangHo Park |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Green Chemistry. 22:1639-1649 |
| ISSN: | 1463-9270 1463-9262 |
| DOI: | 10.1039/c9gc03685g |
| Popis: | Along with the mitigation of CO2 emission, recently, the CO2-derived formic acid process has drawn attention as a promising platform for the renewable-energy-derived hydrogen storage cycle by using formic acid as a liquid organic hydrogen carrier (LOHC). Here, a heterogenized Ru molecular catalyst on a bpyTN-30-CTF support is prepared and successfully implemented in an integrated trickle-bed reactor system for continuous CO2 hydrogenation to produce formic acid. The bpyTN-30-CTF support with an alternative structure of the bpy and TN motif increases the porosity and metal anchoring sites. The Ru/bpyTN-30-CTF catalyst prepared using the bpyTN-30-CTF support displays sufficient catalytic activity for commercialization. Under the continuous process, the catalyst exhibits substantial catalytic performance with the highest productivity of 669.0 gform. gcat−1 d−1 with CO2 conversion of 44.8% for a superficial gas velocity of 72 cm s−1. Furthermore, the catalyst shows excellent stability in the continuous hydrogenation process with a trickle-bed reactor over 30 days of operation, reaching a total turnover number of 524 000 without any significant deactivation. Based on kinetic data, a new process to produce formic acid by CO2 hydrogenation has thus been proposed here. |
| Databáze: | OpenAIRE |
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