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Applied Biochemistry and Biotechnology

, Volume 115, Issue 1–3, pp 1013–1022 | Cite as

Predicted effects of mineral neutralization and bisulfate formation on hydrogen ion concentration for dilute sulfuric acid pretreatment

Session 6A Biomass Pretreatment and Hydrolysis

Abstract

Dilute acid and water only hemicellulose hydrolysis are being examined as part of a multiin stitutional cooperative effort to evaluate the performance of leading cellulosic biomass pretreatment technologies on a common basis. Cellulosic biomass, such as agricultural residues and forest wastes, canhave a significant mineral content. It has been shown that these minerals neutralize some of the acid during dilute acid pretreatment, reducing its effectiveness, and the higher solids loadings desired to minimize costs will require increased acid use to compensate. However, for sulfuric acid in particular, an equilibrium shift to formation of bisulfate during neutralization can further reduce hydrogen ion concentrations and compound the effect of neutralization. Because the equilibrium shift has a more pronounced effect at lower acid concentrations, additional acid is needed to compensate. Coupled with the effect of temperature on acid dissociation, these effects increase acid requirements to achieve a particular reaction rate unless minerals are removed prior to hydrolysis.

Index Entries

Pretreatment dilute acid hemicellulosehydrolysis bisulfate neutralization 

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References

  1. 1.
    Wyman, C. E. (1999), Annu. Rev. Energy Environ. 24, 189–226.CrossRefGoogle Scholar
  2. 2.
    Torget, R., Hatzis, C., Hayward, T. K., Hsu, T.-A., and Philippidis, G. D. (1996), Appl. Biochem. Biotechnol. 57/58, 85–101.Google Scholar
  3. 3.
    Allen, G. A., Schulman, D., Lichwa, J., and Antal, Jr., M. J. (2001), Ind. Eng. Chem. Res. 40, 2352–2361.CrossRefGoogle Scholar
  4. 4.
    Hsu, T. A., Himmel, M., Schell, D., Farmer, J., and Berggren, M. (1996), Appl. Biochem. Biotechnol. 57/58, 3–18.Google Scholar
  5. 5.
    Wooley, R., Ruth, M., Glassner, D., and Sheehan, J. (1999), Biotechnol. Prog. 15 794–803.PubMedCrossRefGoogle Scholar
  6. 6.
    Lynd, L. R., Elander, R. T., Wyman, C. E. (1996), Appl. Biochem. Biotechnol. 57/58, 741–761.CrossRefGoogle Scholar
  7. 7.
    Jacobsen, S. E., and Wyman, C. E. (2000), Appl. Biochem. Biotechnol. 84–86, 81–95.PubMedCrossRefGoogle Scholar
  8. 8.
    Belkacemi, N., Abatzoglou, N., Overend, R. P., and Chornet, E. (1991), Ind. Eng. Chem. Res. 30, 2416–2425.CrossRefGoogle Scholar
  9. 9.
    Maloney, M. T. and Chapman, T. W. (1985), Biotechnol. Bioeng. 27, 355–361.CrossRefGoogle Scholar
  10. 10.
    Adamson, A. W. (1973), A Textbook of Physical Chemistry, Academic, New York, NY.Google Scholar
  11. 11.
    Springer, E. L., Harris, and J. F. (1985), Ind. Eng. Chem. Prod. Res. Dev. 24, 485–489.CrossRefGoogle Scholar
  12. 12.
    Grethlein, H. E., Allen, D. C., and Converse, A. O. (1984), Biotechnol. Bioeng. 26, 1498–1505.CrossRefGoogle Scholar
  13. 13.
    Esteghlalian, A., Hashimote, A. G., Fenske, J. J., and Penner, M. H. (1997), Bioresour. Technol. 59, 129–136.CrossRefGoogle Scholar
  14. 14.
    Torget, R. and Hsu, A. T. (1994), Appl. Biochem. Biotechnol. 45/46, 5–21.Google Scholar
  15. 15.
    Bhandari, N., MacDonald, D. G., and Bakhshi, N. N. (1984), Biotech. Bioeng. 26, 320–327.CrossRefGoogle Scholar
  16. 16.
    Readnour, J. M. and Cobble, J. W. (1969), Inorg. Chem. 8(10), 2174–2182.CrossRefGoogle Scholar
  17. 17.
    BeMiller, I. N. (1967), Adv. Carbohydr. Chem. 22, 25–108.Google Scholar
  18. 18.
    TAPPI. (2002), Ash in wood, pulp, paper and paperboard: combustion at 525°C, in Documenty number TAPPI T-211, Technical Association of the Pulp and Paper Industry, Norcross, GA.Google Scholar
  19. 19.
    Marshall, W. L. and Jones, E. V. (1966), J. Phys. Chem. 70/12, 4028–4040.CrossRefGoogle Scholar
  20. 20.
    Davies, C. W. (1930), The Conductivity of Solutions and the Modern Dissociation Theory, J. Wiley & Sons, New York, NY.Google Scholar

Copyright information

© Humana Press Inc. 2004

Authors and Affiliations

  1. 1.Thayer School of EngineeringDartmouth CollegeHanover

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