8 /min. 



(min.) 



Isothermal 



50 



220 



Temperature (°C.) 



Figure 7. — Chromatogram of the pyrolysis products of cellulose (lower) and cellulose 

 treated with 5 percent zinc chloride. The peaks are (1), (2) fixed gases; 

 (3) acetaldehyde; (4) acetone/propionaldehyde; (5) furan; (6) acrolein; 

 (7) methanol; (8) methyl furan; (10) 2 3 3-butanedione; (11) 2-oxypropanal; 

 (15) 1 -hydroxy -2-propanone ; (16) glyoxal; (17) acetic acid; (18) 2- fur aldehyde; 

 (19) formic acid; (20) 5-methyl-2-furaldehyde; and (21) furfuryl alcohol. 



14 



