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The influence of alkali metal chlorides (NaCl, KCl) and alkaline earth metal chlorides (MgCl 2 , CaCl 2 ) on cellulose pyrolysis was studied with thermal analysis and isothermal pyrolysis in N 2 at 150-400 8C. Alkali and alkaline earth metal chlorides affected the cellulose pyrolysis in different way. Although alkali metal chlorides did not change the weight loss temperature of bulk cellulose (main part of cellulose) so much, alkaline earth metal chlorides substantially reduced the temperature. Furthermore, the influence of alkaline earth metal chlorides on the weight loss behavior (<400 8C) was very dependent on the amount of loading bellow 0.30 mol/mol of the glucose-unit of cellulose, while the influences of the alkali metal chlorides were almost independent of the amount. Both metal chlorides significantly changes the low MW product composition even at a very low level of addition. #

Pyrolysis behavior of wood at gasification temperature (800 8C) was investigated focusing on the behaviors of the wood constituent polymers [cellulose, hemicellulose (glucomannan and xylan) and lignin (milled wood lignin)]. Tar compositions (iso-propanol-soluble and water-soluble tar fractions), which were characterized with GPC, GC-MS, GC-FID (oxime-TMS analysis), capillary electrophoresis and 1 H NMR analysis, were quite different between wood polysaccharides and lignin. Furthermore, comparison of the tar-and secondary char-forming behaviors indicated that comparatively stable primary tar from wood polysaccharides undergo secondary reactions including carbonization after condensation at the reactor wall with lower temperature than their boiling points, while that primary tar from lignin is more reactive to give the vapor phase carbonization products during volatilization. #