Palladium nanoparticles embedded in monolithic microcellular high density polyethylene supports are synthesized as heterogeneous catalysts for remediation of 1,6-dichlorodibenzo-p-dioxin and 2,8-dichlorodibenzofuran in 200 atm of supercritical carbon dioxide containing 10 atm of hydrogen gas and at 50 ~ 90oC. Stepwise removal of chlorine atoms takes place first, followed by saturation of two benzene rings with slower reaction rates. The pseudo first order rate constant of initial hydrodechlorination for 2,8-di- chlorodibenzofuran is 4.3 times greater than that for 1,6-dichlorodibenzo-p-dioxin at 78oC. The catalysts are easily separated from products and can be recyclable and reusable without complicated recovery and cleaning procedures.

Catalytic hydrodechlorination of dioxins over palladium nanoparticles in supercritical CO<sub>2</sub> swollen microcellular polymers

244th National Meeting (2012)

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Catalytic hydrodechlorination of dioxins over palladium nanoparticles in supercritical CO2 swollen microcellular polymers

Catalytic hydrodechlorination of dioxins over palladium nanoparticles in supercritical CO₂ swollen microcellular polymers