Evolution of Lignocellulosic Macrocomponents in the Wastewater Streams of a Sulfite Pulp Mill: A Preliminary Biorefining Approach

Table 2

Stoichiometric factors used to calculate the percentage of theoretical homopolymer.

Hydrolyzed constituents	Homopolymer	Carbohydrate contribution	Conversion factor^a	Hydrolysis factor^b g.sugar/g.polymer	Ethanol factor^c g.EtOH/g.monomer
Glucose	Glucan	Cellulose	162/180	1.11^b	0.511
HMF	Glucan	Cellulose	162/126	—	—
Levulinic acid	Glucan	Cellulose	162/116	—	—
Cellobiose	Glucan	Cellulose	324/342	—	—
Xylose	Xylan	Hemicellulose	132/150	1.136	0.511
Furfural	Xylan	Hemicellulose	132/96	—	—
Formic acid	Xylan	Hemicellulose	132/46	—	—
Arabinose	Arabinan	Hemicellulose	132/150	1.136	0.511
Galactose	Galactan	Hemicellulose	162/180	1.11	0.511
Mannose	Mannan	Hemicellulose	162/180	1.11	0.511
Acetic acid	Acetyl	Hemicellulose	43/60	—	—

Stoichiometric factor used to calculate the percentage of theoretical homopolymer [22].
^bHydrolysis stoichiometric factor of carbohydrate polymers into free sugars [40].
^cEthanol stoichiometric factor describing the mass fraction of sugar monomer converted to ethanol [40].