Assessment of municipal solid wastes gasification in a semi-industrial gasifier using syngas quality indices

Couto, Nuno; Silva, Valter; Monteiro, Eliseu; Rouboa, Abel

doi:10.1016/j.energy.2015.09.064

Cited by 74 publications

(54 citation statements)

References 27 publications

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“…The CH 4 /H 2 and H 2 /CO ratios play an important role in determining the end‐use application for the produced syngas. Syngas with higher CH 4 /H 2 ratio produces a gas more suitable for domestic use whereas syngas with higher H 2 /CO is more convenient for fuel cell integration purposes and chemical industry . Figure E,F presents the CH 4 /H 2 and the H 2 /CO ratio responses.…”

Section: Resultssupporting

confidence: 93%

“…Throughout this process, the said model successfully predicted the syngas compositions at various operating conditions with minor deviations (consistently within an error margin of 20%), perfectly suitable to describe a system as complex as gasification . Figure depicts this agreement by comparing the experimental and numerical syngas compositions for five experimental MSW gasification runs collected from a laboratory‐scale fluidized bed reactor . Additional gasification runs and corresponding validation can be found in the previous studies …”

Section: Resultsmentioning

confidence: 52%

“…Figure depicts this agreement by comparing the experimental and numerical syngas compositions for five experimental MSW gasification runs collected from a laboratory‐scale fluidized bed reactor . Additional gasification runs and corresponding validation can be found in the previous studies …”

Section: Resultsmentioning

confidence: 99%

“…To comprehend the CO 2 addition impact in the gasifying mixture and its further performance during the optimization process responses, the MSW gasification process with air‐CO 2 mixtures and with air alone as a gasifying agent is comparatively addressed. The optimization procedure was engaged considering the results gathered from previous works developed by the research team for both MSW gasification with mixtures of air‐CO 2 and MSW gasification with air . Overall, 18 computer simulations were performed using as input factors for MSW gasification with mixtures of air‐CO 2 the fuel/air equivalence ratio (ER) and CO 2 ‐to‐MSW ratio (CDMR), while MSW feeding rate and air flow rate were used for the MSW air gasification process.…”

Section: Methodsmentioning

confidence: 99%

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Process optimization and robustness analysis of municipal solid waste gasification using air‐carbon dioxide mixtures as gasifying agent

2019

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Summary In this work, a computational fluid dynamics (CFD) model was coupled with an advanced statistical strategy combining design of experiments (DoE) and the Monte Carlo method to comparatively optimize and test the robustness of two municipal solid waste (MSW) gasification processes one using air‐carbon dioxide (CO2) mixtures as a gasifying agent and the other using air alone. A 3k full factorial design of 18 computer simulations was performed using as input factors for air‐CO2 mixtures the equivalence ratio and CO2‐to‐MSW ratio, while MSW feeding rate and air flow rate were used for air gasification. The selected responses were CO2, H2, CO, and CnHm generation, CH4/H2 and H2/CO ratios, carbon conversion, and cold gas efficiency (CGE). Findings were that DoE allowed determining the best‐operating conditions to achieve optimal syngas quality. Monte Carlo identified the best‐operating conditions reaching a more stable high‐quality syngas. Air‐CO2 mixture gasification showed enhanced responses with major improvements in CO2 conversion and CGE, both up to a 13% increase. The optimal operating conditions that set the optimized responses showed to not always imply the most stable set of values to operate the system. Finally, this combined optimization process performance revealed to grant professionals the ability to make smarter decisions in an industrial environment.

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Section: Resultssupporting

confidence: 93%

Section: Resultsmentioning

confidence: 52%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Process optimization and robustness analysis of municipal solid waste gasification using air‐carbon dioxide mixtures as gasifying agent

2019

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“…The resulting slow-down of biomass devolatilization leads to a lower gasification temperature and less carbon conversion and syngas yield [9][10][11][12]. Couto et al [13] assessed the gasification of municipal solids' wastes in a semi-industrial gasifier. They noted an increase in H 2 and CO contents due to a higher gasifier temperature, which in turn led to an increase in the lower heating value (LHV) of syngas.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Recycled Wood Chips, Syngas Yield, and Tar Formation in an Industrial Updraft Gasifier

et al. 2018

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Abstract:In this study, the moisture content, calorific value, and particle size of recycled wood chips were measured. The wood chips were used to fuel an 8.5 MW th updraft gasifier to produce syngas for combustion in a steam-producing boiler. In-situ syngas composition and tar concentrations were measured and analyzed against biomass fuel properties. No efforts were made to adjust the properties of biomass or the routine operating conditions for the gasifier. A sampling device developed by CanmetENERGY-Ottawa (Ottawa, ON, Canada) was used to obtain syngas and tar samples. Wood chip samples fed to the gasifier were taken at the same time the gas was sampled. Results indicate that as the fuel moisture content increases from 20% to 35%, the production of CO drops along with a slight decrease in concentrations of H 2 and CH 4 . Tar concentration increased slightly with increased moisture content and proportion of small fuel particles (3.15-6.3 mm). Based on the findings of this study, biomass fuel moisture content of 20% and particles larger than 6.3 mm (1/4 ) are recommended for the industrial updraft gasifier in order to achieve a higher syngas quality and a lower tar concentration.

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A study on the characteristics of particulate matter in the syngas produced from the waste gasification with cleaning systems for energy utilization

Min

Nam

Kim

et al. 2016

J Mater Cycles Waste Manag

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Assessment of municipal solid wastes gasification in a semi-industrial gasifier using syngas quality indices

Cited by 74 publications

References 27 publications

Process optimization and robustness analysis of municipal solid waste gasification using air‐carbon dioxide mixtures as gasifying agent

Process optimization and robustness analysis of municipal solid waste gasification using air‐carbon dioxide mixtures as gasifying agent

Characterization of Recycled Wood Chips, Syngas Yield, and Tar Formation in an Industrial Updraft Gasifier

A study on the characteristics of particulate matter in the syngas produced from the waste gasification with cleaning systems for energy utilization

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