Experimental production of ethanol, electricity, and furfural under the biorefinery concept

Aristizábal-Marulanda, Valentina; Cardona, A A Carlos

doi:10.1016/j.ces.2020.116047

Cited by 9 publications

(6 citation statements)

References 32 publications

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“…Before the dehydration reaction, the neutralized liquor was mixed with HCl to 0.44 mol L −1 and NaCl at a ratio of 2 kg 10 kg −1 of hydrolysate. The pentose dehydration reaction was carried out at 164 °C and nitrogen was added up to 10 bar (see Supporting Information, Table S4, for hemicellulose conversion) 24 . The liquor was carried to a distillation train to separate and purify furfural.…”

Section: Methodsmentioning

confidence: 99%

“…The pentose dehydration reaction was carried out at 164 °C and nitrogen was added up to 10 bar (see Supporting Information, Table S4, for hemicellulose conversion). 24 The liquor was carried to a distillation train to separate and purify furfural. Subsequently, toluene was added as an adsorption solvent, recirculating more than 95% of the solvent.…”

Section: Process Simulationmentioning

confidence: 99%

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Sustainability assessment of lignocellulosic biorefineries based on sequential pretreatments

Poveda‐Giraldo,

Cardona Alzate

2023

J of Chemical Tech & Biotech

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BackgroundPretreatments are critical in biorefinery analysis, affecting further reactions and downstream processes. However, most pretreatments are studied and optimized as single‐step schemes, focusing on maximizing a sidestream. Sequential pretreatments have been shown to improve the selective isolation of platforms for further valorization. However, pretreatment performance can consider not only technical but also economic, environmental, and social concerns. This work assessed the sustainability of sequential pretreatments in rice husk‐based biorefineries.ResultsFour biorefinery scenarios were designed, simulated, and assessed considering dilute acid and wet air oxidation pretreatment technologies in sequential and single‐step schemes. Economic feasibility was demonstrated for sequential pretreatments when phenolic compounds are contemplated, generating gross incomes of 4.76 M‐USD year‐1. From an environmental perspective, the rice supply chain generated a carbon footprint of 2.17 kg CO2 eq kg‐1 of rice husks, where the producer link is the largest contributor due to fertilizer use. Likewise, it was shown that supplying energy demands using black liquor as fuel relieves operating costs and reduces the carbon footprint. The social dimension showed that between 69 and 77 jobs could be generated annually along the value chain and the biorefinery schemes. However, biorefineries have a high risk due to the high volume of cooling water.ConclusionsAll dimensions were weighted to calculate a sustainability index, where it was concluded that sequential pretreatment biorefineries improved sustainability against the single‐step schemes. However, the scenario of valorization of the three fractions (Sc1) is the best scheme to be implemented as it has always demonstrated economic feasibility.This article is protected by copyright. All rights reserved.

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Section: Methodsmentioning

confidence: 99%

Section: Process Simulationmentioning

confidence: 99%

Sustainability assessment of lignocellulosic biorefineries based on sequential pretreatments

Poveda‐Giraldo,

Cardona Alzate

2023

J of Chemical Tech & Biotech

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“…e spent co ee grounds-a waste product-are used to obtain biodiesel, bioethanol, bio-oil, and also pellets [1,2]. Drying spent co ee grounds represents an important step in its use as green energy and involves high energy consumption, approximately 5 MJ/kg of water when using convective dryers [3].…”

Section: Introductionmentioning

confidence: 99%

Isothermal Drying Kinetic Study of Spent Coffee Grounds Using Thermogravimetric Analysis

Bejenari

Lisa

Cernătescu

et al. 2022

International Journal of Chemical Engineering

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Drying coffee grounds involves high energy consumption and represents an important step in using coffee waste materials as green energy. This study analyzes the drying process using thermogravimetric analysis. The kinetics of the drying process of coffee grounds, containing equal proportions of Arabica and Robusta, were evaluated under isothermal conditions at various temperatures: 50, 60, 70, and 80°C, with sample layer thicknesses of 0.6, 1.2, 1.8, and 2.4 mm. The thermogravimetric curves obtained for the coffee grounds samples under conditions of constant temperature allowed the tracing of the drying curves (moisture content—drying time). The influence of the furnace air velocity on the drying and water evaporation process was analyzed. The drying rate has been established to be about 2.6 times slower than the rate of water evaporation under the same conditions; as a result the overall process is controlled by the effective water diffusion in the layer. This aspect is important in industrial practice for sizing tubular dryers. The activation energy was found to be influenced by the thickness of the coffee grounds layer subjected to the drying process and had values between 8.3 kJ/mol and 10.3 kJ/mol.

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“…The evolution of distinct approaches, which conferred similar biorefineries, has been done in biorefineries' initial configuration. An additional component causing the development in bio-and solar plants commonly used and valorizing the CO2 generated within biorefineries is to combine sustainable energy [7]. Zhang et al [8] proposed biorefineries-based photosynthesis to generate vast volumes of compounds through H2/power and CO2 for next-generation.…”

Section: Introductionmentioning

confidence: 99%

Recent advances in bio-electrochemical system analysis in biorefineries

Siwal

Zhang

Saini

et al. 2021

Journal of Environmental Chemical Engineering

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Experimental production of ethanol, electricity, and furfural under the biorefinery concept

Cited by 9 publications

References 32 publications

Sustainability assessment of lignocellulosic biorefineries based on sequential pretreatments

Sustainability assessment of lignocellulosic biorefineries based on sequential pretreatments

Isothermal Drying Kinetic Study of Spent Coffee Grounds Using Thermogravimetric Analysis

Recent advances in bio-electrochemical system analysis in biorefineries

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