The IBUS Process – Lignocellulosic Bioethanol Close to a Commercial Reality

Larsen, Jan; Petersen, Mai Østergaard; Thirup, Laila; Li, H. Wen; Iversen, Frank

doi:10.1002/ceat.200800048

Cited by 266 publications

(178 citation statements)

References 11 publications

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“…The conversion route from lignocellulosic material to products with higher added value consists of: pretreatment, enzymatic hydrolysis, fermentation, and purification [1,4]. Lignocellulosic biomass contains cellulose, hemicellulose (xylan and arabinan), lignin, ash, and other residues [5].…”

Section: Modeling and Simulation Are Used In This Study As Enabling Tmentioning

confidence: 99%

“…These stages are illustrated in to produce the required steam for ethanol recovery [22]. The exchange of biopellets for steam illustrates the symbiosis between the biorefinery and the nearby power plant following the Integrated Biomass Utilization System (IBUS) [4].…”

Section: Second Generation Bioethanol Plantmentioning

confidence: 99%

“…The pretreatment costs are only due to the steam used in the thermal reactor. The biorefinery is considered to be integrated with a local power plant, possibly owned by the same company following the IBUS principle [4]. Such a design lowers the cost of steam significantly and can be neglected.…”

Section: Uncertainty Analysis Of Costs Profit and Optimal Solutionmentioning

confidence: 99%

“…The latest developments in biorefinery technology show that integrating the facility with a nearby power plant following the Integrated Biomass Utilization System (IBUS) [4] has a major impact on cost efficiency. E.g.…”

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confidence: 99%

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Model-based plantwide optimization of large scale lignocellulosic bioethanol plants

Prunescu

Blanke

Jakobsen

et al. 2017

Biochemical Engineering Journal

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Second generation biorefineries transform lignocellulosic biomass into chemicals with higher added value following a conversion mechanism that consists of: pretreatment, enzymatic hydrolysis, fermentation and purification. The objective of this study is to identify the optimal operational point with respect to maximum economic profit of a large scale biorefinery plant using a systematic model-based plantwide optimization methodology. The following key process parameters are identified as decision variables: pretreatment temperature, enzyme dosage in enzymatic hydrolysis, and yeast loading per batch in fermentation. The plant is treated in an integrated manner taking into account the interactions and trade-offs between the conversion steps. A sensitivity and uncertainty analysis follows at the optimal solution considering both model and feed parameters. * Corresponding authorEmail address: gsi@kt.dtu.dk (Gürkan Sin) March 20, 2017 It is found that the optimal point is more sensitive to feedstock composition than to model parameters, and that the optimization supervisory layer as part of a plantwide automation system has the following benefits: (1) increases the economical profit, (2) flattens the objective function allowing a wider range of operation without negative impact on profit, and (3) reduces considerably the uncertainty on profit. Preprint submitted to Biochemical Engineering Journal

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Section: Modeling and Simulation Are Used In This Study As Enabling Tmentioning

confidence: 99%

Section: Second Generation Bioethanol Plantmentioning

confidence: 99%

Section: Uncertainty Analysis Of Costs Profit and Optimal Solutionmentioning

confidence: 99%

mentioning

confidence: 99%

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Model-based plantwide optimization of large scale lignocellulosic bioethanol plants

Prunescu

Blanke

Jakobsen

et al. 2017

Biochemical Engineering Journal

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“…Ethanol is distilled from the resulting fermentation broth, leaving a fibre stillage which is treated in various separation stages alongside the pretreatment liquid fraction, generating a solid biofuel fraction, a molasses fraction, and a waste water fraction. The molasses fraction can be used in anaerobic fermentation to produce biogas [9] or as animal feed [18], while the solid biofuel can be used for combustion or gasification.…”

Section: Modelling and Dimensioning Of The Ethanol Facilitymentioning

confidence: 99%

Exergy analysis of a combined heat and power plant with integrated lignocellulosic ethanol production

Lythcke-Jørgensen

Haglind

Clausen

2014

Energy Conversion and Management

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Lignocellulosic ethanol production is often assumed integrated in polygeneration systems because of its energy intensive nature. The objective of this study is to investigate potential irreversibilities from such integration, and what impact it has on the efficiency of the integrated ethanol production.An exergy analysis is carried out for a modeled polygeneration system in which lignocellulosic ethanol production based on hydrothermal pretreatment is integrated in an existing combined heat and power (CHP) plant. The ethanol facility is driven by steam extracted from the CHP unit when feasible, and a gas boiler is used as back-up when integration is not possible. The system was evaluated according to six operation points that alternate on the following three different operation parameters: Load in the CHP unit, integrated versus separate operation, and inclusion of district heating production in the ethanol facility. The calculated standard exergy efficiency of the ethanol facility varied from 0.564 to 0.855, of which the highest was obtained for integrated operation at Complete revised manuscript Click here to view linked References 2 minimum CHP load and full district heating production in the ethanol facility, and the lowest for separate operation with zero district heating production in the ethanol facility. The results suggest that the efficiency of integrating lignocellulosic ethanol production in CHP plants is highly dependent on operation, and it is therefore suggested that the expected operation pattern of such polygeneration system is taken into account when evaluating the potential of the ethanol production.

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