Human ingenuity anytime trumps alarmism and hysteria like the Global Warming hoax and Climate Change religion! Let the engineers handle the conversion of CO2 if necessary at all!
Looks like we are about to develop a CO2 recycling capability that takes care of any alarmism and hysteria surrounding this life essential trace gas!
"A team of chemical and biomolecular engineers at Korea Advanced Institute of Science and Technology has developed a scalable way to use bacteria to convert CO2 in the air into a polyester. ..."
"... Liquid compounds of several carbons, such as ethanol, acetic acid, and propanol, can also be produced by these systems, but due to the nature of the chemical reaction that requires more electrons, there are limitations involving the conversion efficiency and the product selection. ..."
"Significance
Although the electrochemical reduction of CO2 into chemicals has been actively explored to address climate change, the products are mainly limited to C1-3 products. Herein, we show that the integration of CO2 electrolysis with microbial fermentation can efficiently produce value-added multicarbon products such as poly-3-hydroxybutyrate (PHB) from gaseous CO2. This biohybrid system comprises electrochemical conversion of CO2 to formate and subsequent biological conversion of formate to PHB by Cupriavidus necator. Optimization of the system to secure suitable conditions for both conversions allowed continuous production of PHB with high titer and productivity which is two orders of magnitude higher than the reported values. This work proposes an exceptional strategy for lowering CO2 emission and producing environmentally friendly bioplastics."
From the abstract:
"Converting anthropogenic [????] CO2 to value-added products using renewable energy has received much attention to achieve a sustainable carbon cycle. CO2 electrolysis has been extensively investigated, but the products have been limited to some C1-3 products. Here, we report the integration of CO2 electrolysis with microbial fermentation to directly produce poly-3-hydroxybutyrate (PHB), a microbial polyester, from gaseous CO2 on a gram scale. This biohybrid system comprises electrochemical conversion of CO2 to formate on Sn catalysts deposited on a gas diffusion electrode (GDE) and subsequent conversion of formate to PHB by Cupriavidus necator cells in a fermenter. The electrolyzer and the electrolyte solution were optimized for this biohybrid system. In particular, the electrolyte solution containing formate was continuously circulated through both the CO2 electrolyzer and the fermenter, resulting in the efficient accumulation of PHB in C. necator cells, reaching a PHB content of 83% of dry cell weight and producing 1.38 g PHB using 4 cm2 Sn GDE. This biohybrid system was further modified to enable continuous PHB production operated at a steady state by adding fresh cells and removing PHB. The strategies employed for developing this biohybrid system will be useful for establishing other biohybrid systems producing chemicals and materials directly from gaseous CO2."
A biohybrid system to extract 20 times more bioplastic from CO2 developed by KAIST researchers
Biohybrid CO2 electrolysis for the direct synthesis of polyesters from CO2 (no public access)
Figure 1. Schematic diagram and photo of the biohybrid CO2 electrolysis system
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