Structural Effects of Cellulose on Hydrolysis and Carbonization Behavior during Hydrothermal Treatment

Paksung, Nattacha; Pfersich, Jens; Arauzo, Pablo J.; Jung, Dennis W.; Kruse, Andrea

doi:10.1021/acsomega.0c00737

Cited by 68 publications

(56 citation statements)

References 83 publications

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“…Differences between the raw sugar beets and the spent sugar beets may be caused by a partial hydrolysis of the amorphous part of cellulose during sugar extraction, while the crystalline structure remains mostly unaffected in the SPB. This agrees with previous studies, which showed that the amorphous structure of the cellulose tends to be hydrolyzed faster than the crystalline structure [ 5 , 30 , 31 ].…”

Section: Resultssupporting

confidence: 93%

“…Thermochemical conversion of biomass is considered as one of the pathways for the production of renewable energy and valuable chemicals or materials. The study of different thermochemical processes such as pyrolysis, gasification, combustion and hydrothermal carbonization (HTC) are well-illustrated in previous studies with model compounds (i.e., microcrystalline cellulose and glucose) for the production of different products [ 3 , 4 , 5 ]. On the other hand, the wish to use biomass in the frame of biorefinery still necessitates research to improve the processes and implement different kinds of biomasses.…”

Section: Introductionmentioning

confidence: 99%

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Hydrothermal Conversion of Spent Sugar Beets into High-Value Platform Molecules

et al. 2020

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The growing importance of bio-based products, combined with the desire to decrease the production of wastes, boosts the necessity to use wastes as raw materials for bio-based products. A waste material with a large potential is spent sugar beets, which are mainly used as animal feeds or fertilizers. After hydrothermal treatment, the produced chars exhibited an H/C ratio of 1.2 and a higher heating value of 22.7 MJ/kg, which were similar to that of subbituminous coal and higher than that of lignite. Moreover, the treatment of 25 g/L of glucose and 22 g/L of fructose by heating up to 160 °C led to a possible application of spent sugar beets for the production of 5-hydroxymethylfurfural. In the present study, the maximum concentration of 5-hydroxymethylfurfural was 3.4 g/L after heating up to 200 °C.

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Section: Resultssupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Hydrothermal Conversion of Spent Sugar Beets into High-Value Platform Molecules

et al. 2020

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“…The datasets encompass a wide range of operational conditions and serve as a stress-test for assessing the routines' reliability. Substrates are representative of herbaceous biomass [miscanthus (Smith and Ross, 2019)], model carbohydrates [cellulose (Paksung et al, 2020)], lignocellulosic materials (fir) and agro-food industry scraps (potato starch). Temperature ranges from 200 to 250 • C, reaction duration from 2 to 24 h, the solid-liquid ratio from 1:3.5 to 1:14.…”

Section: Programsmentioning

confidence: 99%

“…The remaining schemes are worth considering as tentative, more detailed descriptions of the HTC reactions. The literature remarks on the solid-phase autocatalytic behavior of HTC (Brown, 1997;Paksung et al, 2020), and the first reaction of schemes 2, 3, and 6 accounts for this. For activating the process, a certain amount of HC1 should be present as the reactions start (time zero, reactor heated up to the setpoint temperature).…”

Section: Scheme Network Propensity Functionsmentioning

confidence: 99%

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Biomass Hydrothermal Carbonization: Markov-Chain Monte Carlo Data Analysis and Modeling

2021

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This paper introduces Bayesian statistical methods for studying the kinetics of biomass hydrothermal carbonization. Two simple, specially developed computer programs implement Markov-chain Monte Carlo methods to illustrate these techniques' potential, long since established in other areas of chemical reaction engineering. A range of experimental data, both from this study and the literature, test the soundness of a Bayesian approach to modeling biomass hydrothermal carbonization kinetics. The first program carries out parameter estimations and performs better or equal than the traditional deterministic methods (R2 as high as 0.9998). For three out of the 22 datasets, the program detected the global minima of the parameter space, while the deterministic least-square found local values. The second program uses Gillespie's algorithm for the statistical simulation of the reactions occurring in hydrothermal carbonization. Comparing six basic kinetic models with literature data tested the stochastic simulation as a tool for assessing biomass conversion reaction networks rapidly. Among the simple models discussed, reaction scheme 3 fitted better to the experimental data (R2 > 0.999). The proposed approach is worth extending to more complex, time-consuming computer models and could support other techniques for studying hydrothermal conversions.

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A Comparative Techno‐Economic and Lifecycle Analysis of Biomass‐Derived Anode Materials for Lithium‐ and Sodium‐Ion Batteries

Trotta

Wang

Guo

et al. 2022

Advanced Sustainable Systems

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The transition towards renewable energy and electric transportation depends on the development of efficient energy storage technologies. Lithium‐ion batteries (LIBs) have gained increasing popularity despite rising prices and uncertainty around sourcing the component materials. This has recently prompted the development of alternative alkali batteries, such as sodium‐ion batteries (SIBs). However, despite academic efforts focused on optimizing technical performance, few have studied the underlying economic and environmental impacts of alkali batteries. Therefore, this research examines the techno‐economic and environmental performance of SIBs, using a “cradle‐to‐gate” life cycle assessment of cell manufacturing, comparing sodium‐ion half cells (coin cells) with their lithium counterparts. An optimal charge capacity of 312.4 mAh g−1 for sodium‐ion half‐cells has been achieved using glucose‐derived hard‐carbons, a 45% charge capacity increase compared to lithium. Sodium half‐cells are shown to be 18% cheaper compared to lithium. From the life cycle analysis, it is found that sodium‐ion half‐cells show the lowest environmental footprint across all impact categories compared to lithium. It can be concluded that sodium is a credible alternative to LIBs with a preference for SIBs when environmental factors are jointly considered with techno‐economics.

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Structural Effects of Cellulose on Hydrolysis and Carbonization Behavior during Hydrothermal Treatment

Cited by 68 publications

References 83 publications

Hydrothermal Conversion of Spent Sugar Beets into High-Value Platform Molecules

Hydrothermal Conversion of Spent Sugar Beets into High-Value Platform Molecules

Biomass Hydrothermal Carbonization: Markov-Chain Monte Carlo Data Analysis and Modeling

A Comparative Techno‐Economic and Lifecycle Analysis of Biomass‐Derived Anode Materials for Lithium‐ and Sodium‐Ion Batteries

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