Assessment of black liquor hydrothermal treatment under sub- and supercritical conditions: Products distribution and economic perspectives

Barros, Thiago Vinícius; Carregosa, Jhonattas de Carvalho; Wisniewski, Alberto; Freitas, Antônio Carlos Daltro de; Guirardello, Reginaldo; Ferreira‐Pinto, Leandro; Bonfim-Rocha, Lucas; Jegatheesan, Veeriah; Cardozo‐Filho, Lúcio

doi:10.1016/j.chemosphere.2021.131774

Cited by 22 publications

(15 citation statements)

References 41 publications

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“…For calculating part of operating costs, Table 1 presents the prices adopted based on the Aspen Process Utility costs databank and market references aligned to a similar work developed in the Brazilian scenario ( Barros et al, 2022 ).…”

Section: Methodsmentioning

confidence: 99%

Simultaneous extraction of sunflower oil and active compounds from olive leaves using pressurized propane

Jaski

Abrantes

Zanqui

et al. 2022

Current Research in Food Science

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Section: Methodsmentioning

confidence: 99%

Simultaneous extraction of sunflower oil and active compounds from olive leaves using pressurized propane

Jaski

Abrantes

Zanqui

et al. 2022

Current Research in Food Science

Self Cite

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“…The results show that BL gasification is an attractive technology to generate electricity co-generated energy based on gas turbines (Eriksson and Harvey, 2004). Liquid and gaseous products from BL gasification could be an interesting route for obtaining fuel gases and value-added bioproducts (Barros et al, 2022).…”

Section: Market Opportunities For Blgmentioning

confidence: 97%

“…Liquid and gaseous products from gasification could be obtained at a cost of $ 56.64 and $ 3.35 per ton of stream, respectively. Therefore, black liquor gasification is an interesting challenge for obtaining fuel gases and value-added bioproducts (Barros et al, 2022). The in situ gasification experiment included the following parameters: temperature of 1173 K, water mass fraction of 80 %, heating rate of 10 K/min and feed temperature of 673 K. By applying this technology, a gaseous product was developed, named syngas, with a low carbon footprint, rich in H2, with a calorific value comparable to other types of fossil or alternative gas fuels (Cao et al, 2019);(Bach et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Study on the Process of Gasification of Black Liquor

Marian,

Zaharioiu,

Bucura

et al. 2023

CTNS

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This review paper describes the potential of developing a new lignocellulosic biorefinery concept integrated with the Kraft industry. To demonstrate that gasification is a sustainable and more valuable processing route than burning it in recovery boilers, additional processes of syngas cleaning and high sulfur recovery are required in order to achieve a significant reduction in operating costs to improve economic feasibility through BL gasification. BL gasification is performed using two types of gasifiers, one with a fluidized bed, which requires a higher air velocity to increase the yield of valuable products aiding to increase the calorific value of the produced gas compared to fixed bed gasifiers. Fixed-bed gasifiers produce gas with a high tar content because the heat and mass transfer between the gasifier and the biomass is low and non-uniform. BL gasification offers great potential for increased energy recovery with a reduced amount of emissions compared to that of conventional BL burning in recovery boilers.

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“…To simplify the thermodynamic modeling, the solid phase is treated as ideal, as indicated by Equation (7), thus eliminating the need to estimate non-idealities. This approach seems reasonable given the significant amounts of water introduced into the reactive system during supercritical water gasification, which hinders the formation of solid phase components [10,12,17].…”

Section: Chemical and Phase Equilibrium Formulated As A Gibbs Energy ...mentioning

confidence: 99%

Gasification of Lignocellulosic Waste in Supercritical Water: Study of Thermodynamic Equilibrium as a Nonlinear Programming Problem

dos Santos Junior,

Mariano

2024

Eng

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As one of the main industrial segments of the current geoeconomics scenario, agro-industrial activities generate excessive amounts of waste. The gasification of such waste using supercritical water (SCWG) has the potential to convert the waste and generate products with high added value, hydrogen being the product of greatest interest. Within this context, this article presents studies on the SCWG processes of lignocellulosic residues from cotton, rice, and mustard husks. The Gibbs energy minimization (minG) and entropy maximization (maxS) approaches were applied to evaluate the processes conditioned in isothermal and adiabatic reactors, respectively. The thermodynamic and phase equilibria were written as a nonlinear programming problem using the Peng–Robinson state solution for the prediction of fugacity coefficients. As an optimization tool, TeS (Thermodynamic Equilibrium Simulation) software v.10 was used with the help of the trust-constr algorithm to search for the optimal point. The simulated results were validated with experimental data presenting surface coefficients greater than 0.99, validating the use of the proposed modeling to evaluate reaction systems of interest. It was found that increases in temperature and amounts of biomass in the process feed tend to maximize hydrogen formation. In addition to these variables, the H2/CO ratio is of interest considering that these processes can be directed toward the production of synthesis gas (syngas). The results indicated that the selected processes can be directed to the production of synthesis gas, including the production of chemicals such as methanol, dimethyl ether, and ammonia. Using an entropy maximization approach, it was possible to verify the thermal behavior of reaction systems. The maxS results indicated that the selected processes have a predominantly exothermic character. The initial temperature and biomass composition had predominant effects on the equilibrium temperature of the system. In summary, this work applied advanced optimization and modeling methodologies to validate the feasibility of SCWG processes in producing hydrogen and other valuable chemicals from agro-industrial waste.

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Assessment of black liquor hydrothermal treatment under sub- and supercritical conditions: Products distribution and economic perspectives

Cited by 22 publications

References 41 publications

Simultaneous extraction of sunflower oil and active compounds from olive leaves using pressurized propane

Simultaneous extraction of sunflower oil and active compounds from olive leaves using pressurized propane

Study on the Process of Gasification of Black Liquor

Gasification of Lignocellulosic Waste in Supercritical Water: Study of Thermodynamic Equilibrium as a Nonlinear Programming Problem

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