No.33 Pyrolysis and Gasification mechanisms focusing on the reaction between CO_2 and Ash

Abstract

The study aimed to examine the effect of CO_2 environments during pyrolysis of solid fuel on the gasification of its char by using thermobalance. The lignin which had high concentration of Na was pyrolyzed at heating rate of 1 K/s to 973 K under CO_2 and Ar, and these chars were gasified in air at 973 K. It was found that carbonate formed, and chemical form of Na significantly varied during pyrolysis under CO_2. The change of chemical form of Na inhibited gasification reaction.