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Treatment Variable Effects on Supercritical Gasification of High-Diversity Grassland Perennials

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Abstract

Low-input high-diversity (LIHD) mixtures of native grassland perennials were subjected to a supercritical treatment process with the aim of obtaining hydrogen-rich gases. The process was studied based on the following treatment variables: reaction temperature (374 °C to 575 °C, corresponding to a pressure range of 22.1 to 40 MPa), residence time (10 to 30 min), biomass content in the feed, and catalysts (0% to 4% NaOH and solid alkali CaO–ZrO2). The gaseous phase produced from gasification of LIHD primarily consisted of hydrogen (H2), with a mixture of carbon monoxide (CO), methane (CH4), and carbon dioxide (CO2). The statistical significance of treatment variables was evaluated using analysis of variance (ANOVA). It showed that at the level of P < 0.05, temperature, catalysts, and biomass content in the feed significantly affected gas yields, while residence time was not significant.

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Acknowledgements

The University of Minnesota Initiative for Renewable Energy and the Environment (IREE) is gratefully acknowledged for its financial support. The authors would like to thank collaborators: Dr. David Tilman, Dr. Shri Ramaswamy, Dr. Ulrike W Tschirner, Dr. Waleed Wafa Al-Dajani, and Dr. Huajiang Huang.

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Authors and Affiliations

  1. BioTechnology Institute, University of Minnesota, 240 Gortner Labs, 1479 Gortner Avenue, St. Paul, MN, 55108, USA

    Bo Zhang, Zhigang Zhang, Marc von Keitz & Kenneth Valentas

  2. Biological Engineering Program, Department of Natural Resources and Environmental Design, North Carolina A&T State University, 1601 East Market Street, Greensboro, NC, 27411, USA

    Bo Zhang

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  1. Bo Zhang
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  2. Zhigang Zhang
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  3. Marc von Keitz
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  4. Kenneth Valentas
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Correspondence to Bo Zhang.

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Zhang, B., Zhang, Z., von Keitz, M. et al. Treatment Variable Effects on Supercritical Gasification of High-Diversity Grassland Perennials. Appl Biochem Biotechnol 154, 59–66 (2009). https://doi.org/10.1007/s12010-009-8563-6

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  • DOI: https://doi.org/10.1007/s12010-009-8563-6

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