(752f) Intensification of Biorefinery Operations Using Building Blocks
- Conference: AIChE Annual Meeting
- Year: 2019
- Proceeding: 2019 AIChE Annual Meeting
- Group: Computing and Systems Technology Division
- Time: Friday, November 15, 2019 - 9:35am-9:54am
Recently, a new method for systematic process intensification, which relies on building block-based representation of chemical process flowsheets, has been introduced . These building blocks can be integrated to form a two-dimensional grid embedding numerous non-trivial process alternatives [6-9]. Each block can be assigned with several physicochemical phenomena, e.g. reaction, vapor-Liquid equilibrium, solid-liquid equilibrium, etc., combination of which can yield various intensification pathways. In this work, we extend this novel representation methodology to various operations that take place in a biorefinery. Pulping which occurs in a pulp digester lies at the heart of a pulp mill and, here, we develop a new representation based on fundamental building blocks to represent the pulp digestion process. Mass transfer boundary layer is represented by the boundary shared by two neighboring blocks in different phases and digestion process is represented within the interior of the block. This building-block based representation is modeled using a mixed-integer nonlinear programming (MINLP) problem so as to minimize the energy consumption and increasing the yield of the process while searching for several intensified pathways. The proposed approach is demonstrated through several case studies focusing on the conventional Kraft pulping process, Kraft pulping process with pre-extraction of hemicellulose, Kraft pulping process with pre-extraction of hemicellulose and short fibers.
 Huang, H., Lin, W., Ramaswamy, S., Tschirner, U. (2009) Process Modeling of Comprehensive Integrated Forest Biorefinery â An Integrated Approach. Applied Biochemistry and Biotechnology, 154, pp. 205-216.
 Tian, Yuhe., Demirel, S.E.., Hasan, M.M.F., Pistikopoulos, E.N., (2018) An overview of process systems engineering approaches for process intensification: State of the art. Chemical Engineering and Processing - Process Intensification, 133, pp. 160-210.
 Aden, A., Ruth, M., Ibsen, K., Jechura, J., Neeves, K., Sheehan, J., Wallace, B., Montague, L., Slayton, A., Lukas, J., (2002) NREL Report TP-510-32438. Lignocellulosic Biomass to Ethanol Process Design and Economics Utilizing Co-Current Dilute Acid Prehydrolysis and Enzymatic Hydrolysis for Corn Stover.
 Huang, H., Ramaswamy, S., Al-Dajani, W.W., Tschirner, U. (2010) Process modeling and analysis of pulp-mill based integrated biorefinery with hemicelluloses pre-extraction for ethanol production: A comparative study. Bioresource Technology 101, pp. 624-631.
 Demirel, S.E., Li, J., Hasan, M.M.F., (2017) Systematic process intensification using building blocks. Computers and Chemical Engineering, 105, pp. 2-38.
 Li, J., Demirel, S. E., Hasan, M. M. F., (2018) Process Synthesis Using Block Superstructure with Automated Flowsheet Generation and Optimization. AIChE Journal, 64(8), pp. 3082-3100.
 Li J., Demirel S.E., Hasan M.M.F. (2018) Process Integration using Block Superstructure. Industrial & Engineering Chemistry Research, 57(12), pp. 4377â4398.
 Li, J., Demirel, S.E., & Hasan, M. M. F. (2019). Building Block-Based Synthesis and Intensification of Work-Heat Exchanger Networks (WHENS). Processes, 7(1), 23.
 Demirel, S. E., Li, J., and Hasan, M. M. F. (2019). A General Framework for Process Synthesis, Integration, and Intensification. Industrial & Engineering Chemistry Research. DOI: 10.1021/acs.iecr.8b05961.