Towards model-based design of biofuel value chains

Villeda, JJ Victoria; Dahmen, Manuel; Hechinger, Manuel; Voll, Anna; Marquardt, Wolfgang

doi:10.1016/j.coche.2012.08.001

Cited by 11 publications

(4 citation statements)

References 54 publications

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“…Figure 1). 2,3 Selective bio- and chemo-catalytic process steps aim for an energy- and carbon-efficient conversion of lignocellulosic biomass into molecularly well-defined fuel compounds. Generally, preservation of nature’s synthetic power to the extent possible is envisaged to minimise the number of process steps in the transformation process (cf.…”

Section: Fuel Designmentioning

confidence: 99%

Tailor-made fuels for future engine concepts

Hoppe

Heuser

Thewes

et al. 2015

International Journal of Engine Research

107

103

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Increasing carbon dioxide accumulation in earth's atmosphere and the depletion of fossil resources pose huge challenges for our society and, in particular, for all stakeholders in the transportation sector. The Cluster of Excellence 'Tailor-Made Fuels from Biomass' at RWTH Aachen University establishes innovative and sustainable processes for the conversion of whole plants into molecularly well-defined fuels exhibiting tailored properties for low-temperature combustion engine processes, enabling high efficiency and low pollutant emissions. The concept of fuel design, that is, considering fuel's molecular structure to be a design degree of freedom, aims for the simultaneous optimisation of fuel production and combustion systems. In the present contribution, three examples of tailor-made biofuels are presented. For spark ignition engines, both 2-methylfuran and 2-butanone show increased knock resistance compared to RON95 gasoline, thus enabling a higher compression ratio and an efficiency gain of up to 20% at full-load operation. Moreover, both fuels comprise a good mixture formation superior to the one of ethanol, especially under difficult boundary conditions. For compression ignition engines, 1-octanol enables a remarkable reduction in engine-out soot emissions compared to standard diesel fuel due to the high oxygen content and lower reactivity. This advantage is achieved without sacrificing the high indicated efficiency and low NO X emissions.

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Section: Fuel Designmentioning

confidence: 99%

Tailor-made fuels for future engine concepts

Hoppe

Heuser

Thewes

et al. 2015

International Journal of Engine Research

107

103

View full text Add to dashboard Cite

show abstract

“…Whereas biofuel production based on gasification or pyrolysis is thought to yield mixtures of hydrocarbons designed to match the properties of fossil fuels, the aqueous phase processing of carbohydrates derived from hydrolysis of cellulose and hemicellulose enables selective access to one or few oxygenated fuel components, e.g., ethanol, 2-methyltetrahydrofuran, γ-valerolactone, ethyl-levulinate or 2-methylfuran . The molecular structure of such oxygenated fuel can be tailored to exhibit desired physicochemical properties that unlock the full potential of advanced internal combustion engines. − …”

Section: Introductionmentioning

confidence: 99%

Model-Based Formulation of Biofuel Blends by Simultaneous Product and Pathway Design

Dahmen

Marquardt

2017

Energy Fuels

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Oxygenated species obtained from the selective chemo-catalytic refunctionalization of lignocellulosic materials and rationally formulated mixtures thereof can be tailored to the needs of advanced internal combustion engine concepts like low temperature compression-ignition or highly boosted spark-ignition combustion. In the present contribution, we present a framework for model-based formulation of biofuel blends with tailored properties by considering the fuel’s molecular composition as the fundamental design degree of freedom. To this end, optimization-based reaction pathway screening is combined with mathematical fuel property prediction by means of structural group contribution and quantitative structure–property relationship modeling in order to formulate and solve an integrated product and pathway design problem. The model-based approach is envisioned (i) to guide fundamental experimental investigations of the combustion behavior of blended biofuels toward the most favorable mixtures and (ii) to identify promising conversion pathways for further elaboration by means of reaction engineering and conceptual process design. The latter is ultimately needed to bridge the gap from the mass- and energy-based molecular level analysis presented here to a process level analysis addressing the economics of the involved conversion and separation steps. A case study is dedicated to the identification of promising blends and respective production routes for the spark-ignition (SI) engine. The goal here is to produce a 100% bioderived fuel with tailored properties from hexoses and pentoses of lignocellulosic biomass by utilizing renewable hydrogen from carbon-free energy sources such as wind or solar to boost the energy of fuel produced for a given quantity of biomass supplied.

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“…gas, solid residue, and aqueous phase) valorization and designing an entire sustainable value chain, future liquid biofuel production towards poly-generation through technique integration may be also promising. However, considering the complexity of the liquid biofuel production system, it is necessary to simulate the target products and process design in chemical engineering [199].…”

Section: Conceptual Innovation and Designmentioning

confidence: 99%

Liquid biofuel powering the sustainable transport with a low-carbon emission: a review

Tao,

Chen,

Wang

et al. 2023

Prog. Energy

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Energy consumption from transport has been increasing at a fast rate and become a major sector, which takes 29% of total global energy demand. Since transport energy consumption primarily relies on fossil fuels, it has resulted in serious carbon emissions and environmental degradation. Moreover, the volatility prices of fossil fuel and unstable international security have attracted keen interest for many developing and industrialized countries looking for sustainable and clean alternatives. Liquid biofuels, including but not limited to bioethanol, biodiesel, bio-jet fuel, are considered as the most promising alternative and more expansive role in powering sustainable transport, for its carbon neutral and low-emissions properties. Liquid biofuels contribute 4% of transport in 2020 and have been foreseen to continuously grow. Liquid biofuels can be produced by diverse technologies and commercialized in various ways, easy-adapt to technical and policy challenges. Major challenges include technical bottleneck, initial and operational cost, byproduct treatment, and associated environmental concern. This paper critically reviews: (1) Categories and production of different liquid biofuels; (2) Application scenarios of liquid biofuels; (3) Environmental impact assessment of liquid biofuels; (4) Opportunities and challenges of liquid biofuels; (5) Future perspectives. Each type of liquid biofuel requires specific production processes and has a strong correlation with biomass raw materials. Liquid biofuels find extensive applications in transportation, aviation, and other functional domains. In addition, the life cycle assessment of liquid biofuels is carried out from the numerous aspects of raw materials, pretreatment, production process, and application. Furthermore, this study analyzes the related policies, highlighting the challenges associated with the unstable supply of clean energy, raw materials, and quality control. Finally, the future perspectives of liquid biofuels were presented. This comprehensive review aims to provide a systematic understanding of liquid biofuels, covering their production and applications from multiple perspectives, while offering insights into future developments.

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Towards model-based design of biofuel value chains

Cited by 11 publications

References 54 publications

Tailor-made fuels for future engine concepts

Tailor-made fuels for future engine concepts

Model-Based Formulation of Biofuel Blends by Simultaneous Product and Pathway Design

Liquid biofuel powering the sustainable transport with a low-carbon emission: a review

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