A new strategy for CO₂ utilization with waste plastics: conversion of hydrogen carbonate into formate using polyvinyl chloride in water

Abstract

A new and green approach for hydrogen carbonate reduction and PVC dechlorination in water in a single step.

Recent Progress in the Chemical Upcycling of Plastic Wastes

“…[108] Jin and co-workers proposed the simultaneous PVC dechlorination and the CO 2 reduction [109,110] into valuable formate under hydrothermal conditions. [111] In the work, bicarbonate and carbonate salts were employed as the starting materials to represent absorbed CO 2 solutions. The PVC was added into the aqueous solutions and the mixtures were heated to about 300°C.…”

Materials from waste plastics for CO2capture and utilisation

“…Other than CO 2 capture, a recent study demonstrated the non-intuitive possibility of using PVC for CO 2 reduction, while achieving simultaneous de-chlorination of PVC. 55 Using aqueous HCO 3 − to simulate the CO 2 source when captured in alkaline solution, PVC was able to reduce hydrogen carbonate to formate at 300 °C in a batch tubular reactor. Mechanistic studies suggest that under alkaline conditions, PVC will undergo de-chlorination via elimination and substitution, forming a nucleophilic intermediate that could engage in redox reaction with hydrogen carbonate in water (Fig.…”

Palladium nanoparticles on chitin-derived nitrogen-doped carbon materials for carbon dioxide hydrogenation into formic acid

“…1,2 To tackle with these problems, scientists have explored along different directions, such as the valorization of renewable feedstock alternatives to fossil fuels, [3][4][5][6] CO 2 capture and storage, 1 and CO 2 renery and utilization. [7][8][9][10] As a non-toxic, cheap, and abundant C1 renewable carbon resource, CO 2 utilization for value-added compounds and energy products furnishes as a promising approach to not only alleviating the greenhouse effect but also bringing about extra environmental and economic values. 11 So far, great achievements have been made in the chemical transformation of CO 2 into diverse chemicals, fuels, and materials.…”