Comparison between secondary thermal cracking methods and venturi scrubber filtering in order to reduce tar in biomass gasification

Surjosatyo, Adi; Anggriawan, Muhammad Barryl; Hermawan, Andika Akbar; Dafiqurrohman, Hafif

doi:10.1016/j.egypro.2019.01.200

Cited by 14 publications

(6 citation statements)

References 1 publication

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“…In summary, Table shows the performances of most of the above-discussed tar handling methods reported, which are operated on an industrial scale. ,− By observing Table , it is understood that OLGA manages to achieve removal efficiencies of 80–92% even when employed as hot gas cleaning (673 K), since oil-based scrubbers can be effective without cooling. Other than OLGA, which is used at high temperatures, only the venturi scrubbers and bed filters, which are used at low temperatures, show removal efficiencies >90%.…”

Section: Tar Destruction/removal: Existing Technologiesmentioning

confidence: 99%

Tar Formation in Gasification Systems: A Holistic Review of Remediation Approaches and Removal Methods

Jayanarasimhan,

Pathak,

Shivapuji

et al. 2024

ACS Omega

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Gasification is an advanced thermochemical process that converts carbonaceous feedstock into syngas, a mixture of hydrogen, carbon monoxide, and other gases. However, the presence of tar in syngas, which is composed of higher molecular weight aromatic hydrocarbons, poses significant challenges for the downstream utilization of syngas. This Review offers a comprehensive overview of tar from gasification, encompassing gasifier chemistry and configuration that notably impact tar formation during gasification. It explores the concentration and composition of tar in the syngas and the purity of syngas required for the applications. Various tar removal methods are discussed, including mechanical, chemical/catalytic, and plasma technologies. The Review provides insights into the strengths, limitations, and challenges associated with each tar removal method. It also highlights the importance of integrating multiple techniques to enhance the tar removal efficiency and syngas quality. The selection of an appropriate tar removal strategy depends on factors such as tar composition, gasifier operating and design factors, economic considerations, and the extent of purity required at the downstream application. Future research should focus on developing cleaning strategies that consume less energy and cause a smaller environmental impact.

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Section: Tar Destruction/removal: Existing Technologiesmentioning

confidence: 99%

Tar Formation in Gasification Systems: A Holistic Review of Remediation Approaches and Removal Methods

Jayanarasimhan,

Pathak,

Shivapuji

et al. 2024

ACS Omega

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“…In this context, the increase in temperature can shift the equilibrium of the reactions, favoring the direction of CH 4 towards additional reactions that convert it into thermal cracking products, such as H 2 . These opposite trends in the concentrations of H 2 and CH 4 reveal the complexity of the reactions involved in the gasification process and the importance of temperature as a decisive variable that influences reaction rates and equilibria [41,42].…”

Section: Effect Of Temperature On Gasification Testsmentioning

confidence: 99%

Techno-Economic Evaluation of Downdraft Fixed Bed Gasification of Almond Shell and Husk as a Process Step in Energy Production for Decentralized Solutions Applied in Biorefinery Systems

Carmo-Calado,

Hermoso-Orzáez,

La Cal-Herrera

et al. 2023

Agronomy

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The objective of the present study was to carry out a technical study of the gasification of almond shells and husks at different temperatures and, subsequently, an economic analysis for the in situ installation of a decentralized unit to produce electricity, through a syngas generator, that would overcome the use of fossil fuels used in this agroindustry. The gasification tests were carried out at three different temperatures (700, 750 and 800 °C) and the results for the tests carried out were as follows: a 50:50 mixture of almond husks and shells was found to have a lower heating value of value of 6.4 MJ/Nm3, a flow rate of 187.3 Nm3/h, a syngas yield of 1.9 Nm3/kg, cold gas efficiency of 68.9% and carbon conversion efficiency of 70.2%. Based on all the assumptions, a 100 kg/h (100 kWh) installation was proposed, located near the raw material processing industries studied, for an economic analysis. The technical–economic analysis indicated that the project was economically viable, under current market conditions, with a calculated net present value of k€204.3, an internal rate of return of 20.84% and a payback period of 5.7 years. It was concluded that thermal gasification is a perfectly suitable technology for the recovery of raw materials of lignocellulosic origin, presenting very interesting data in terms of economic viability for the fixed bed gasification system.

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“…Char and tar usually occur because of secondary polymerization reactions during SCWG. However, at high reaction temperatures (≥500 °C), gasification and reforming of tar and char have been reported, which lowers their formation [56]. The formation of tar and char is not typically observed from SCWG of liquid feedstocks such as It should be noted that a fraction of H 2 in the gas phase can be contributed through water splitting during the SCWG process [50].…”

Section: Validity Of Model Equation With Simulated Crude Glycerol And...mentioning

confidence: 99%

Hydrogen Production from Supercritical Water Gasification of Model Compounds of Crude Glycerol from Biodiesel Industries

et al. 2023

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Biodiesel production through transesterification results in a large quantity of crude glycerol as a byproduct, the utilization of which is technically and economically challenging. Because of the ability to efficiently process wet feedstocks, supercritical water gasification (SCWG) is utilized in this study to convert crude glycerol into hydrogen-rich syngas. A significant challenge addressed through this study is the decomposition routes of different heterogeneous components of crude glycerol during SCWG. Pure glycerol, methanol and oleic acid were investigated for SCWG as the model compounds of crude glycerol. SCWG of model compounds at temperature, pressure, feedstock concentration and reaction time of 500 °C, 23–25 MPa, 10 wt% and 1 h, respectively, revealed methanol to exhibit the highest H2 yield of 7.7 mmol/g, followed by pure glycerol (4.4 mmol/g) and oleic acid (1.1 mmol/g). The effects of feedstock concentration from 30 wt% to 10 wt% increased H2 yield from all model compounds. Response surface methodology (RSM) was used to develop a response curve to visualize the interactive behavior and develop model equations for the prediction of H2-rich gas yields as a function of the composition of model compounds in the crude glycerol mixture. Predictive models showed a good agreement with experimental results, demonstrating high accuracy and robustness of the model. These findings demonstrated a strong potential of crude glycerol for SCWG to generate H2-rich syngas.

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Comparison between secondary thermal cracking methods and venturi scrubber filtering in order to reduce tar in biomass gasification

Cited by 14 publications

References 1 publication

Tar Formation in Gasification Systems: A Holistic Review of Remediation Approaches and Removal Methods

Tar Formation in Gasification Systems: A Holistic Review of Remediation Approaches and Removal Methods

Techno-Economic Evaluation of Downdraft Fixed Bed Gasification of Almond Shell and Husk as a Process Step in Energy Production for Decentralized Solutions Applied in Biorefinery Systems

Hydrogen Production from Supercritical Water Gasification of Model Compounds of Crude Glycerol from Biodiesel Industries

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