Ashutosh Mittal

Ashutosh Mittal

Research Scientist

Photo of Ashutosh Mittal
(303) 384-6136
At NREL Since: 

Ashutosh Mittal received his Ph.D. in Paper and Bioprocess Engineering from the Department of Paper and Bioprocess Engineering at the State University of New York, Empire State College of Environmental Science and Forestry, Syracuse. His dissertation work was focused on studying the kinetics of hemicellulose (sugars) extraction from hardwoods (sugar maple and aspen) during hot water extraction (autohydrolysis). To describe the concentrations of the residual xylan, xylooligomers, xylose, and degradation product (furfural) obtained in the autohydrolysis of wood chips, a mass-transfer model based on first-order kinetics with Arrhenius-type temperature dependence of the rate coefficients was developed. The model was calibrated against experimental data obtained during the autohydrolysis of sugar maple wood chips carried out under various pretreatment conditions in a 4.7-liter M/K digester. In this work, the monosaccharide and oligomers content in the wood hydrolyzates resulting from the solubilization of hemicelluloses during autohydrolysis of hardwoods was quantified with recently developed high-resolution 1H-NMR spectroscopic analyses of hard wood hydrolyzates.


  • Ph.D., Paper and Bioprocess Engineering, State University of New York, ESF, Syracuse

  • M.S., Paper Science and Engineering, State University of New York, ESF, Syracuse.

Selected Publications 

  1. Mittal, A.; Iribarne, J.; Rajan, K.G.; Chatterjee, S.G. (2006). "Buildup of dissolved solids in a paperboard mill with water closure,." Progress in Paper Recycling (15:3); pp. 19-32.
  2. Mittal, A.; Kataria, T.; Das, G.K.; Chatterjee, S.G. (2006). "Evaporative cooling of water in a small vessel under varying ambient humidity." International Journal of Green Energy (3:4); pp. 347-368.
  3. Mittal, A.; Scott, G.M.; Amidon, T.E. (2006). "Autohydrolysis of Sugar Maple — Part II." ESPRA Research Report, No. 124 pp. 59-72.
  4. Mittal, A.; Scott, G.M.; Amidon, T.E. (2005). "Autohydrolysis of Sugar Maple — Part I." ESPRA Research Report, No. 123 pp. 43-56.