Modelling and experimental investigation of small-scale gasification CHP units for enhancing the use of local biowaste

Priall, Oisín de; Gogulancea, Valentina; Brandoni, Caterina; Hewitt, Neil; Johnston, Chris; Onofrei, George; Huang, Ye

doi:10.1016/j.wasman.2021.10.012

Cited by 9 publications

(6 citation statements)

References 43 publications

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“…Additionally, cogeneration systems may be used to accomplish the generation of both electrical and thermal energy. [1][2][3][4][5][6] The gasification process that is used for renewable energy sources that are derived from biomass is quite similar to the gasification process that is used for coal in many aspects. During the process of thermal breakdown, the by-product gases that are produced by the gasification of biomass and coal are identical.…”

Section: Discussionmentioning

confidence: 99%

“…All energy sources used by humans in the economy and industry are included in the total consumption of global energy [2,3]. The high rate of population increases and the amount of energy used per person have a significant impact on energy consumption.…”

Section: Global Energy Statusmentioning

confidence: 99%

“…In this experimental investigation, we evaluated the performance of a downdraft gasifier using three different biomass fuels: wood chips, rice husks, and sugarcane bagasse. [3][4][5][6][7][8][9] The gasifier performance was evaluated in terms of gas composition, tar content, and carbon conversion efficiency. The results showed that the gas composition varied slightly with different biomass fuels, with hydrogen being the main component in all cases.…”

Section: Fig 3: Assessing the Efficiency Of Carbon Conversion In Down...mentioning

confidence: 99%

“…Forestry residues are particularly critical, with efforts to find eco-friendly disposal methods that benefit forest management. [3][4] Mill residues offer cost-effective advantages, as the collecting and chipping processes are integrated into commercial mill operations. They are already being used to generate steam and power.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Investigation of Downdraft Gasifier Using Different Biomass Fuels

2024

IJPREMS

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In a study, methane and carbon dioxide were generated through downdraft fixed-bed gasification, converting rice husks, waste plastic, and sawdust. The heat potential in biomass is crucial for synthetic gas production, and waste plastic, with the highest heating value at 40 MJ/kg, offers superior potential for high hydrogen concentration in synthetic gas (3-18% by volume) compared to rice husk and sawdust. Rice husk yields lower hydrogen and methane concentrations than sawdust. Gasification efficiency and output depend on the gasifier type, with downdraft fixed-bed gasifiers being highly effective. The gasification process's outcomes rely on factors like reactor temperature, catalyst exposure time, residence time, and catalyst heating temperature. This process transforms biomass into synthetic gas, which can power internal combustion engines and facilitate cogeneration for both electricity and heat. Biomass gasification shares similarities with coal gasification, yielding similar by-product gases during thermal breakdown but with less stringent operating requirements. Rice husk, waste plastic, and sawdust are fed into a downdraft fixed-bed gasifier, and synthetic gas is collected at the exhaust end. Analysing synthetic gases involves gas analysers, and this gas can drive engines, boilers, and machinery. Additionally, a MATLAB code snippet integrated into a Gasifier simulation GUI application enables users to visualize performance metrics, aiding understanding and optimization of gasifier dynamics for educational and practical purposes.

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Section: Discussionmentioning

confidence: 99%

Section: Global Energy Statusmentioning

confidence: 99%

Section: Fig 3: Assessing the Efficiency Of Carbon Conversion In Down...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Experimental Investigation of Downdraft Gasifier Using Different Biomass Fuels

2024

IJPREMS

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“…Other thermochemical conversion methods for PL researched include pyrolysis [16] and hydrothermal carbonisation and anaerobic digestion [17]. However, as discussed in [18] there is potential in using small scale (< 250 kW) gasification units for onsite heat and electricity production in poultry farms. Such concepts have already been demonstrated for the paper industry [19], oil waste [20] and the use of gasification by-products for onsite energy was researched by Vakalis [21] but has not been fully explored for the poultry industry.…”

Section: Introductionmentioning

confidence: 99%

Gasification of Biowaste Based on Validated Computational Simulations: A Circular Economy Model to Handle Poultry Litter Waste

Priall

Brandoni

Gogulancea

et al. 2022

Waste Biomass Valor

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Converting waste biomass resources through downdraft gasification can generate a producer gas for a combined heat and power unit. The study includes feedstock analysis, process modelling using ECLIPSE simulation software, and experimental analysis of materials in a pilot-scale fixed-bed downdraft gasifier. Anaerobic digestate and miscanthus were investigated for comparing the gasification potential of poultry litter as an energy source. Models validated through experimental analysis were applied to a case study based on a typical poultry farm in Northern Ireland.; Results found producer gas with a lower heating value up to 4.15 MJ/Nm3 can be generated. Sufficient poultry waste is generated on-site to produce the required heat and electricity for each shed, allowing the farm to switch from fossil fuels to a local renewable resource and addressing the waste disposal issue.; Downdraft gasification coupled with cogeneration could have a payback period of 4–5 years given the correct conditions. The net present value is positive for all technologies considered (i.e. internal combustion engine and the Organic Rankine cycle combined heat and power unit) under different subsidies, showing the economic viability of the solution. The break-even selling price could be lower than the current grid electricity selling price (£120/MWh) when incentives such as: (i) avoiding disposal cost of £30/tonne, (ii) selling the biochar by-product at £200/tonne and (iii) fuel displacement costs of 1.5p/kWh are considered. Graphical abstract

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Modeling, simulation, and optimization of combined heat and power generation from produced syngas

Rossetti¹

2023

Advances in Synthesis Gas : Methods, Technologies and Applications

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Modelling and experimental investigation of small-scale gasification CHP units for enhancing the use of local biowaste

Cited by 9 publications

References 43 publications

Experimental Investigation of Downdraft Gasifier Using Different Biomass Fuels

Experimental Investigation of Downdraft Gasifier Using Different Biomass Fuels

Gasification of Biowaste Based on Validated Computational Simulations: A Circular Economy Model to Handle Poultry Litter Waste

Modeling, simulation, and optimization of combined heat and power generation from produced syngas

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