Performance Analysis of a Biomass Supercritical Water Gasification Process under Energy Self-sufficient Condition

Arpornwichanop, Amornchai; Boonpithak, Nathapol; Kheawhom, Soorathep; Ponpesh, Pimporn; Authayanun, Suthida

doi:10.1016/b978-0-444-63455-9.50118-5

Cited by 6 publications

(4 citation statements)

References 4 publications

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“…Likewise, acceptable correlations were reported between the simulation output under chemical equilibrium and the experimental data obtained for glycerol, corn starch, and saw dust [13] and for the black liquor of wheat straw in supercritical water at 750 • C [38]. In this paper, the suitability of the chemical equilibrium in predicting the performance of the SCWG reactor is compared with the experimental data of two previous studies, using glycerol at a reaction temperature of 800 • C with an Ni-based catalyst [39] and a simulated bio-oil aqueous phase fraction consisting of a mixture of acetic acid, acetol, 1-butanol, and glucose over an Ni-based catalyst [40] at 800 • C. In addition, the experimental data of the SCWG of cornstarch [41] and the simulation output in an SCWG process [42] have also been used for validation.…”

Section: Validation Of the New Approachmentioning

confidence: 99%

A Practical Approach to Using Energy Integration in the Simulation of Biomass Thermochemical Processes: Application to Supercritical Water Gasification

Gutiérrez Ortiz,

López-Guirao

2024

Applied Sciences

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Solid biomass is usually simulated by decomposing it into a solid phase (carbon, ash, and sulfur) and a gas phase (water and diatomic molecules of H2, N2, O2, and Cl2) from the proximate and ultimate analysis before entering a reactor operating under chemical equilibrium when using Aspen Plus. However, this method prevents the use of energy integration for the feed stream from the system inlet to the reactor. This paper proposes an approach to solving this issue, considering biomass with both known and unknown chemical compositions; the latter involves the decomposition of biomass into complex molecular compounds. Different process arrangements were assessed to achieve a realistic simulation, and a sensitivity analysis was carried out to examine the effect of the concentration and heating upstream of the reactor, focused on supercritical water gasification (SCWG) of orange peel. This process is very energy-intensive, so the approach is useful for a better calculation of the energy requirement and exergy losses in a plant; these are usually and mainly related to the train of heat exchangers. In addition to this application to SCWG, this approach can be used for any other thermochemical process, such as gasification, pyrolysis, or combustion, and for any real biomass. Upon a base case study using a wet biomass of 10,000 kg/h with 90 wt.% water where the SCWG reaction takes place at 240 bar and 800 °C, if the temperature at the SCWG reactor inlet increases from 350 °C to 400 °C, the heat exchange increases by 57% from 4 MW and by 34% if the water content decreases to 70 wt.%, although more heat relative to the solid is saved.

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Section: Validation Of the New Approachmentioning

confidence: 99%

A Practical Approach to Using Energy Integration in the Simulation of Biomass Thermochemical Processes: Application to Supercritical Water Gasification

Gutiérrez Ortiz,

López-Guirao

2024

Applied Sciences

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“…nitrous oxides, sulfur dioxide and fine particles) are produced from the gasification, even when the feedstock contains nitrogen and sulfur elements. As a result, SCWG has attracted much attention around the world, and considerable developments and progress have been made in recent years (Arpornwichanop et al, 2014;Azadi and Farnood, 2011;Cao et al, 2013;Ding et al, 2014;Guan et al, 2013;Guo et al, 2013;Muangrat et al, 2010;Peterson et al, 2008;Sawai et al, 2013;Sınag et al, 2010;Yanik et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Gasification of petrochemical sludge in supercritical water

Zhang

Zhao

2016

Proceedings of the Institution of Civil Engineers - Water Manag

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In wastewater treatment plants, petrochemical sludge is generated during the treatment of oily industrial wastewaters produced in petrochemical production. Although most of the oil floats on the wastewater, a portion is carried into the sludge with settling solids. The gasification of petrochemical sludge in supercritical water was investigated in a reactor at temperatures of 530-650°C, pressures of 26-42 MPa and residence times of 200-360 s. Pressure change was found to have no significant influence on gasification efficiency. Higher temperatures and longer residence times enhanced gasification efficiency, and lower temperatures favoured hydrogen production. The addition of potassium carbonate increased both the hydrogen fraction and the gas yield. The precipitated alkali in the reactor still showed a high catalytic effect on the subsequent gasification of petrochemical sludge without further alkali addition. The catalytic activity was slightly reduced because the potassium carbonate is transformed to potassium hydrogen carbonate.

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“…These impressive abilities of supercritical water to treat organic materials are based on its unique thermo physical properties [10,11]. Under SCWG conditions, water is not only a solvent, but also an active reactant contributing to gasification chemistry [12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Petrochemical Wastewater Gasification with Na2CO3 and K2CO3

Fan¹

2015

Pol. J. Environ. Stud.

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Gasification of petrochemical wastewater for hydrogen production in supercritical water was studied in a fluidization bed system with the presence of Na 2 CO 3 and K 2 CO 3 . The influences of the main parameters, including temperature, pressure, feedstock concentration, and catalyst addition, on the gasification process were discussed. Experiment results show that temperature is the key factor and pressure has a minor effect on petrochemical wastewater gasification. Higher temperature and pressure favors petrochemical wastewater gasification. Gasification performance of petrochemical wastewater decreases with increasing concentration. Gasification efficiency increases and molar fraction of CO decreases with Na 2 CO 3 and K 2 CO 3 addition. It is implied that the supercritical water fluidization bed system is effective for hydrogen production by biomass gasification.

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Performance Analysis of a Biomass Supercritical Water Gasification Process under Energy Self-sufficient Condition

Cited by 6 publications

References 4 publications

A Practical Approach to Using Energy Integration in the Simulation of Biomass Thermochemical Processes: Application to Supercritical Water Gasification

A Practical Approach to Using Energy Integration in the Simulation of Biomass Thermochemical Processes: Application to Supercritical Water Gasification

Gasification of petrochemical sludge in supercritical water

Petrochemical Wastewater Gasification with Na2CO3 and K2CO3

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