Biorefineries for Sustainable Food-Fuel-Fibre Production: Towards a Circular Economy

Gheewala, Shabbir H.

doi:10.1051/e3sconf/201912501002

Cited by 4 publications

(2 citation statements)

References 3 publications

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“…Innovation in biofuel production (for example, advanced biofuels) need to be continually promoted. The optimal utilization of biomass residues via the so-called biorefineries is also important for resource and energy-efficient biofuel and bioproducts production (Gheewala, 2019). Thailand, for example, has been promoting the so-called Bio-Circular-Green Economy (BCG) model, which emphasizes the utilization of biomass for energy and materials, particularly value-added products, to help transition to a circular economy and address some of the United Nations' Sustainable Development Goals (SDGs).…”

Section: Lca Of Biofuels and Bioproductsmentioning

confidence: 99%

“…Handled properly, biofuels, though not a silver bullet or the major energy carriers, can still play an important role in a sustainable energy transition towards net zero. Also, combining value-added biomaterials with biofuels in biorefineries would make the production profitable and more environmentally friendly and stabilize the security of both bio-based energy and materials (Gheewala, 2019;.…”

Section: Quo Vadis?mentioning

confidence: 99%

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Life cycle assessment for sustainability assessment of biofuels and bioproducts

Gheewala

2023

Biofuel Res. J.

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Bio-based materials have been used traditionally for millennia. Their use was overtaken in recent times by the discovery and utilization of fossil-based resources for materials and energy. However, concerns about the non-renewability of fossil resources and greenhouse gas and other emissions associated with their use have brought forth a renewed interest in using bio-based materials in recent years. The environmental advantages of bio-based materials cannot be taken for granted without a rigorous scientific assessment. Many tools based on energy, economics, and environmental impacts have been used. Life cycle assessment is one such tool developed and successfully utilized for the environmental assessment of biofuels and bioproducts. However, many methodological challenges, among other things related to system boundaries, functional units, allocation, and carbon accounting, still need further research and consideration. In this work, the related issues are summarized, and the directions for addressing them are discussed. Despite the methodological challenges in their assessment, biofuels and bioproducts show promise in terms of their environmental advantages compared to their fossil-oriented counterparts. These advantages can be further enhanced by utilizing all parts of the feedstock biomass, especially for value-added materials and chemicals via biorefineries.

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Section: Lca Of Biofuels and Bioproductsmentioning

confidence: 99%

Section: Quo Vadis?mentioning

confidence: 99%

Life cycle assessment for sustainability assessment of biofuels and bioproducts

Gheewala

2023

Biofuel Res. J.

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Techno-economic analysis and eco-efficiency indicators of a biomass-solar hybrid renewable energy system for João Pinheiro City

Campos,

de Sá Machado,

Soares

et al. 2024

Discov Sustain

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The study aims to rapidly scale up Hybrid Renewable Energy System (HRES) specifically emphasizing bioenergy generation for isolated rural communities. It aims to identify the most profitable and efficient configuration for HRES biomass-solar in João Pinheiro, taking advantage of local eucalyptus production to reduce costs associated with the transport of biomass waste, considering energy, economic and ecological indicators. Eucalyptus waste was chosen as the source of biomass as fuel, the Downdraft gasifier with air as the gasification agent, and monocrystalline silicon technology was selected for photovoltaic modules. Two case study scenarios were proposed based on global efficiency calculations. The techno-economic analysis was applied based on the First Law of Thermodynamics and the Levelized Cost of Electricity (LCOE) method. Case 2 showed the overall energy efficiency of 17.43% and LCOE 0.034 US$/kWh more suitable for HRES solar-biomass technology. Additionally, the eco-efficiency indicator indicator based on the calculated Net Present Value and ecological efficiency indicator, allowed evaluation of the relationship between added value and the environmental impacts associated with the studied configurations, with case 2 presenting 9.28e−05 kgCO2/US$ as best result. The conclusions show that the techno-economic analysis applied to the HRES syngas-solar, along with the eco-efficiency indicator, presents the viability of decentralized bioenergy supply, particularly in isolated rural communities. This innovative approach encourages sustainable measures to meet energy needs in isolated regions with climatic, environmental and biomass supply conditions like those of João Pinheiro.

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The combustion of lemon peel oil/gasoline blends in spark ignition engine with high-insulation piston crown coating

Saravanan,

Varuvel,

Vikneswaran

et al. 2024

Sci Rep

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This study explored the recovery of oil from lemon peel biomass and then tested it in a spark ignition as a substitute for gasoline. The study adopted the micro-arc oxidation coating technique, intending to improve the engine performance of the lemon peel oil-gasoline blends. The oil was recovered from discarded lemon peel biomass using steam distillation and then tested in the engine as a fuel by blending it with gasoline at volume ratios of 10, 20, and 30%. An endoscopic visualization approach was employed in this research work to assess the combustion initiation and flame characteristics of gasoline and lemon peel oil blends under different test conditions. Compared to gasoline and blends comprising 20 and 30% lemon peel oil, the 10% lemon peel oil mix produced higher thermal efficiency and lower emissions. The optical analysis demonstrated that premixed combustion with the 10% blend was found to be the highest, resulting in improved combustion and subsequently increased cylinder pressure. To improve the engine performance of the lemon peel oil blends with higher substitution (20 and 30%), the piston was coated with a ceramic coating. A novel technique, namely the micro-arc oxidation technique, was utilized for the coating. The coated piston engine fueled with a 20% lemon peel oil blend showed a 3% and 4.69% increase in thermal efficiency compared to the uncoated piston fueled with a 20% blend and sole gasoline, respectively. The hydrocarbon and carbon monoxide emissions of the engine with a coated piston fueled by the 20% lemon peel oil blend were reduced by 12.7% and 12%, respectively, as compared to gasoline operation in the engine with an uncoated piston.

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Biorefineries for Sustainable Food-Fuel-Fibre Production: Towards a Circular Economy

Cited by 4 publications

References 3 publications

Life cycle assessment for sustainability assessment of biofuels and bioproducts

Life cycle assessment for sustainability assessment of biofuels and bioproducts

Techno-economic analysis and eco-efficiency indicators of a biomass-solar hybrid renewable energy system for João Pinheiro City

The combustion of lemon peel oil/gasoline blends in spark ignition engine with high-insulation piston crown coating

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