Development of Biorefineries–Technical and Economic Considerations

Dean, Bill; Dodge, Tim; Valle, Fernando Cano; Chotani, Gopal

doi:10.1002/9783527619849.ch3

Cited by 4 publications

(2 citation statements)

References 13 publications

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“…Performance in saccharification was indistinguishable among fresh whole fermentation broth, fresh fully recovered and formulated product, and 28-d-old fermentation broth. These results suggest that typical recovery and formulation costs can be eliminated for use in biorefinery operations, especially in an integrated plant that both makes and uses the cellulase enzymes (Dean et al 2006).…”

Section: Process Economicsmentioning

confidence: 98%

The economics of current and future biofuels

Tao

Aden

2009

In Vitro Cell.Dev.Biol.-Plant

143

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This work presents detailed comparative analysis on the production economics of both current and future biofuels, including ethanol, biodiesel, and butanol. Our objectives include demonstrating the impact of key parameters on the overall process economics (e.g., plant capacity, raw material pricing, and yield) and comparing how nextgeneration technologies and fuels will differ from today's technologies. The commercialized processes and corresponding economics presented here include corn-based ethanol, sugarcane-based ethanol, and soy-based biodiesel. While actual full-scale economic data are available for these processes, they have also been modeled using detailed process simulation. For future biofuel technologies, detailed technoeconomic data exist for cellulosic ethanol from both biochemical and thermochemical conversion. In addition, similar techno-economic models have been created for n-butanol production based on publicly available literature data. Key technical and economic challenges facing all of these biofuels are discussed.

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Section: Process Economicsmentioning

confidence: 98%

The economics of current and future biofuels

Tao

Aden

2009

In Vitro Cell.Dev.Biol.-Plant

143

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“…This might change with the increase of CO2-pricing, thereby demanding low carbon emitting technologies. However, ongoing development of innovative production processes and sustainable resource management still have to be done to guarantee the most efficient use of the raw materials (Dean et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Conversion of xylose into D-xylitol using catalytic transfer hydrogenation with formic acid as H-donor

Aigner,

Hinterholzer,

Almhofer

et al. 2023

BioRes

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d-Xylitol, a biomass-derived sweetener, is increasingly used in cosmetics and pharmaceutical products. The raw material for d-xylitol production, d-xylose, is easily accessible from dissolving pulp production. d-xylitol production involves the heterogeneously catalyzed hydrogenation of d-xylose; this process is energy intensive, as the use of H2 requires high pressure and temperature. This work examined catalytic transfer hydrogenation for xylose conversion into xylitol. Formic acid (FA) was used to replace H2 as the H-donor, as it is easily available, inexpensive, may be obtained from renewable sources, and it avoids the risks associated with the use of high-pressure inflammable gas. A variety of commercially available catalysts were screened to reveal the one enabling the highest yield. The experiments were performed at 40, 80, and 140 °C, with pure xylose as a model compound. Triethylamine (Et3N) was added to ensure sufficient conversion rates. Based on the preliminary studies an experimental design was created (Design Expert®), including the two best performing catalysts Ru/Al2O3 and Ru/C, to investigate the influence of temperature and H-donor and base concentration on xylitol yield. Ru/C resulted in maximum d-xylitol yield of 73.2 % at 100 °C, FA to d-xylose ratio 5:1 and Et3N to FA ratio 0.4.

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