Abstract:Five catalysts, including CaCO3, CaO, Fe2O3, iron powder and Na2CO3 were used as catalytic agents in the catalytic pyrolysis of painted wood. Solid and liquid products of pyrolysis were collected separately for yield calculation and products characterization. The results showed that all five catalysts effectively improved the yield of solid products. In addition, CaCO3, Na2CO3 and iron powder also increased the yield of liquid products. The content of titanium in all solid products was in a high level, which may cause potential environmental pollution. The liquid products of pyrolysis mainly included esters, ketones, alcohols, phenols and acids, and a small amount of nitrogen-containing substances. The introduction of CaCO3, CaO, Fe2O3 and Na2CO3 could reduce the content of acids in the liquid products. In summary, CaCO3 was more efficient at improving the quality of both solid and liquid pyrolysis products.
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