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A new strategy for CO2 utilization with waste plastics: conversion of hydrogen carbonate into formate using polyvinyl chloride in water.
- Source :
- Green Chemistry; 1/21/2020, Vol. 22 Issue 2, p352-358, 7p
- Publication Year :
- 2020
-
Abstract
- 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 NaHCO<subscript>3</subscript> 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 °C. The mechanistic study suggests that CH–OH group formation from the substitution reaction of chlorine in PVC by OH<superscript>−</superscript> is an important starting step, and then the CH–OH group and HCO<subscript>3</subscript><superscript>−</superscript> 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 HCO<subscript>3</subscript><superscript>−</superscript> to formate using PVC. The present study provides a new and green method for not only hydrogen carbonate/CO<subscript>2</subscript> conversion but also PVC waste dechlorination in a single step. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14639262
- Volume :
- 22
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- Green Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 141412599
- Full Text :
- https://doi.org/10.1039/c9gc02484k