Abstract
ASPEN-PlusŖ process modeling software is used to model carbonic acid pretreatment of biomass. ASPEN-Plus was used because of the thorough treatment of thermodynamic interactions and its status as a widely accepted process simulator. Because most of the physical property data for many of the key components used in the simulation of pretreatment processes are not available in the standard ASPEN-Plus property databases, values from an in-house database (INHSPCD) developed by the National Renewable Energy Laboratory were used. The standard non-random-two-liquid (NRTL) or renon route was used as the main property method because of the need to distill ethanol and to handle dissolved gases. The pretreatment reactor was modeled as a “black box” stoichiometric reactor owing to the unavailability of reaction kinetics. The ASPEN-Plus model was used to calculate the process equipment costs, power requirements, and heating and cooling loads. Equipment costs were derived from published modeling studies. Wall thickness calculations were used to predict construction costs for the high-pressure pretreatment reactor. Published laboratory data were used to determine a suitable severity range for the operation of the carbonic acid reactor. The results indicate that combined capital and operating costs of the carbonic acid system are slightly higher than on H2SO4-based system and highly sensitive to reactor pressure and solids concentration.
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References
Lynd, L., Elander, R. T., and Wyman, C. E. (1996), Appl. Biochem. Biotechnol. 54/55, 741–749.
Wooley, R. and Putsche V. (1996), NREL/MP-425-20685, National Renewable Energy Laboratory, Golden, CO.
Wooley, R., Ruth, M., Ibsen, K., Sheehan, J., Majdeski, H., and Galvez, A. (1999), NREL/TP-580-26157, National Renewable Energy Laboratory, Golden, CO.
van Walsum, G. P. (2001), Appl. Biochem. Biotechnol. 91/93, 317–328.
van Walsum, G. P., McWilliams, R., and Shi, H. (2002), in Proceedings of the 12 th European Conference and Technology Exhibition on Biomass for Energy, Industry and Climate Protection. p. 809–812.
McWilliams, R. C., and van Walsum, G. P., (2002), Appl. Biochem. Biotechnol. 98/100, 109–134.
Yourchisin, D. and van Walsum, G. P. (2004), in Appl. Biochem. Biotechnol. submitted.
van Walsum, G. P. and Shi, H. (2004), Bioresour. Technol., submitted.
Puri, V. P., and Mamers, H., (1983), Biotechnol. Bioeng. 25, 3149–3161.
Wooley, R., and Ibsen, E., (1987), Phil. Trans. R. Soc. Lond. A321, 523–536.
Wooley, R. and Ibsen, K. (2000)., Rapid Evaluation of Research Proposals Using Aspen Plus, presentation at Aspen World 2000, Feburary, 4–7, Orlando, FL.
Perry, H. R., and Green, D. W., (1993), in Handbook of Chemical Engineering, 5th Ed. McGraw-Hill, New York, NY, pp. 10,136–10,156.
McAloon, A., Taylor, F., Yee, W., Wooley, R., and Ibsen, K., (2000), DOE-ac36-99-GO 10337, National Renewable Energy Laboratory, Golden, CO.
American Institute of Chemical Engineers. (2001), Chemical Engineering Plant Cost Index, Chemical Engineering Progress, p. 134.
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Jayawardhana, K., Peter Van Walsum, G. Modeling of carbonic acid pretreatment process using ASPEN-plusŖ . Appl Biochem Biotechnol 115, 1087–1102 (2004). https://doi.org/10.1385/ABAB:115:1-3:1087
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DOI: https://doi.org/10.1385/ABAB:115:1-3:1087