61.石炭の昇温熱分解時における塩素の行方

抄録

Pyrolysis of seven coals with different ranks has been carried out in a temperature-programmed mode at 10℃/min with a fixed bed quartz reactor. HCl is the predominant product among Cl-containing species observed at 800℃, followed by char-Cl and tar-Cl. The peak temperatures of HCl formation are classified roughly into 280-360, 470-510 and 580℃. It appears likely that HCl reacts with a brown coal char at 500℃ to form Cl-containing compounds, which are converted to HCl upon reheating. The HCl peak at 580℃ appears for all of the coals examined, and the yield decreases with increasing calcium content in coal.