Table l .--Effect of (NHi^) 2liP0it and (NHi^)2S0i^ on pyrolysis and combustion 

 threshold temperature (°C.)^ 



Treatment 



(NH4)2HP0i^ treated cellulose 

 Pyrolysis (N2) : Combustion (air) 



(NH4)2S04 treated cellulose 

 Pyrolysis (N2) ! Combustion (air) 



Untreated 



cellulose 290 298 290 298 



Treated 



eel lulose 2 



0.0500 



286 



294 



257 



280 



.100 



274 



285 



239 



250 



.200 



264 



272 



2 34 



242 



.300 



255 



266 



2 30 



239 



.400 



253 



262 



231 



231 



.500 



250 



254 



229 



229 



.700 



243 



252 



228 



231 



1.00 



234 



249 



224 



230 



1.50 



230 



241 



229 



225 



2.00 



216 



237 



213 



228 



3.00 



212 



221 



210 



221 



4.00 



209 



213 



202 



217 



5.00 



207 



210 



201 



213 



6.00 



199 



209 



200 



212 



8.00 



196 



208 



199 



211 



10.0 



189 



206 



196 



208 



12.0 



190 



202 



195 



210 



15.0 



187 



200 



194 



208 



20.0 



190 



199 



195 



205 



25.0 



186 



193 



190 



203 



The threshold temperature is arbitrarily denoted as the temperature required to 

 produce a weight loss rate of 0.09 milligrams per minute (< 1 percent of the maximum 

 weight loss rate) . 



2 Percent by weight chemical. 



Table 4.--TGA-DTG thermal behavior of cellulose and (NHif)2HP0i^ treated 



cellulose in nitrogen 



Treatment 



Residue 

 at 450° C. 



Normali zed 

 ce'l lulose 



residue 

 at 450° C. 



Peak rate 

 of weight 

 loss 



Normalized peak 

 rate of weight 

 loss 



Peak 

 temperature 



Percent 



Percent 



Mg./min. 



Mg . /min . 



Untreated 

 cellulose 



Treated 



eel lulose ' 



7.6 



7.6 



5.13 



5.13 



367 







0500 



12 



2 



12 



2 



5 



50 



5.50 



348 





100 



15 







14 



9 



5 



00 



5.00 



340 





200 



19 



6 



19 



5 



4 



48 



4.49 



334 





300 



22 



2 



22 



1 



4 



38 



4.39 



329 





400 



24 



4 



24 



3 



4 



26 



4.28 



328 





500 



25 



8 



25 



6 



4 



20 



4.22 



326 





700 



28 



6 



28 



4 



4 



05 



4.08 



321 



1 



00 



30 



2 



29 



9 



3 



96 



4.00 



316 



1 



50 



34 



4 



34 







3 



52 



3.57 



311 



2 



00 



35 



8 



35 



2 



3 



43 



3.50 



306 



3 



00 



39 



4 



38 



4 



2 



90 



3.02 



298 



6 



00 



42 



8 



41 



4 



2 



52 



2.68 



281 



10 







45 



2 



43 



2 



2 



19 



2.43 



264 



12 







46 







43 



6 



2 



33 



2.65 



261 



15 







47 



4 



44 



6 



3 



05 



3.59 



259 



20 







48 



4 



44 



8 



3 



23 



4.04 



253 



25 







49 



2 



44 



5 



3 



66 



4.88 



250 



Percent by weight chemical. 



