Journal
GREEN CHEMISTRY
Volume 22, Issue 2, Pages 352-358Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9gc02484k
Keywords
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Funding
- State Key Program of the National Natural Science Foundation of China [21436007]
- National Key R&D Program of China [2018YFC0309800]
- Natural Science Foundation of Shanghai [19ZR1424800]
- Center of Hydrogen Science, Shanghai Jiao Tong University, China
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This work reports the first observation of the reduction of hydrogen carbonate to formate with polyvinyl chloride (PVC) as a hydrogen source in high-temperature water. Results show that NaHCO3 is successfully converted into formate with a 16% yield and nearly 100% selectivity based on hydrogen carbonate, simultaneously achieving the complete dechlorination of PVC at 300 degrees C. The mechanistic study suggests that CH-OH group formation from the substitution reaction of chlorine in PVC by OH- is an important starting step, and then the CH-OH group and HCO(3)(-)react to form formate via a redox reaction. Moreover, the selection of water as the reaction medium played a key role in the reduction of HCO3- to formate using PVC. The present study provides a new and green method for not only hydrogen carbonate/CO2 conversion but also PVC waste dechlorination in a single step.
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