1 Introduction
2 Experimental
2.1 Materials
2.2 Methods
2.2.1 Chemical characterization of pine sawdust and unhydrolyzed solid residue
2.2.2 Hemicellulose hydrolysis procedure
Acid type | Concentration levels and pH of the acid solutions | ||
---|---|---|---|
Low | Medium | High | |
H2SO4 | 0.5% (1.30) | 1.5% (0.90) | 2.5% (0.73) |
HCOOH | 15% (1.38) | 30% (0.95) | 40% (0.61) |
\( \left.\begin{array}{c}\kern.2em {\mathrm{H}}_2{\mathrm{SO}}_4\\ {}\kern.8em \mathrm{HCOOH}\end{array}\right\} \)
| \( \left.\begin{array}{c}0.5\%\\ {}5.5\%\end{array}\right\} \)(1.16) | \( \left.\begin{array}{c}0.5\%\\ {}10\%\kern0.5em \end{array}\ \right\} \)(1.09) | \( \left.\begin{array}{c}0.5\%\\ {}15\%\kern0.5em \end{array}\right\} \)(1.01) |