Numerical analysis of bio-methane production from biomass-sewage sludge oxy-steam gasification and methanation process

Gabbrielli, Roberto; Barontini, Federica; Frigo, Stefano; Bressan, L.

doi:10.1016/j.apenergy.2021.118292

Cited by 20 publications

(5 citation statements)

References 29 publications

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“…In order to analyze the CH4 yield, a simulation model of the plant has been constructed and implemented in Aspen Plus [21]. The plant lay-out, covered by patent [23], is reported in Figure 8 and is composed by a water shift reactor for the transformation of CO into CO2, and by four Sabatier catalytic reactors where the following reaction takes place: CO2 + 4 H2 → CH4 + 2 H2O A CO2 capture system using KOH solution and a water separator assure the production of a high pure methane stream.…”

Section: Methanation Modelling Activitymentioning

confidence: 99%

“…An initial experimental campaign has been conducted utilizing a small-scale downdraft gasifier (roughly 100 kWth). The results have been utilized to set a pseudo-kinetic model of the gasification process, implemented in Aspen Plus environment, already developed [20,21]. The model has then been used to analyse the performance of the oxy-CO2 gasification strategy varying the operative parameters.…”

Section: Introductionmentioning

confidence: 99%

“…The model has then been used to analyse the performance of the oxy-CO2 gasification strategy varying the operative parameters. Finally, the numerical model of a methanation plant, already created [21], has been utilised to study the possibility of transforming the syngas into synthetic methane.…”

Section: Introductionmentioning

confidence: 99%

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Biomass oxy-CO₂ gasification process for bio-methane production: an experimental and numerical activity

Gabbrielli

Barontini

Frigo

et al. 2022

J. Phys.: Conf. Ser.

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Biomass gasification is a thermochemical process in which the biomass is converted into a mixture of gases, called syngas, commonly utilised in thermal machines to produce electricity and heat. In the present research activity, the conventional air-gasification in downdraft gasifier is replaced by oxy-CO2 gasification technology. This strategy allows to obtain a nitrogen-free syngas, mainly composed by CO, H2, CO2 and CH4, which can be used into the synthesis of various bio-fuels like methanol or synthetic natural gas (SNG). Carbon dioxide is utilized as gasifying agent together with oxygen to mitigate the reactivity of the latter, which can lead to excessive reaction temperatures. In particular, the present work shows the preliminary results of an experimental campaign carried on utilizing a small scale downdraft gasifier (max thermal power of roughly 100 kW) fed with wood pellet and using a mixture of oxygen and CO2 as gasification agent. The experimental results have been utilized to calibrate a pseudo-kinetic model of the oxy-CO2 gasification process, implemented in Aspen Plus environment. To analyse the possibility to transform the produced syngas into methane, an additional numerical model of a methanation plant was then utilised. As a whole, the numerical analysis confirms its usefulness in predicting the performance of the gasifier, which can reach a cold gas efficiency of around 70%, while the methanation plant can achieve a production of roughly 20 kg of methane per 100 kg of gasified wood.

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Section: Methanation Modelling Activitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Biomass oxy-CO₂ gasification process for bio-methane production: an experimental and numerical activity

Gabbrielli

Barontini

Frigo

et al. 2022

J. Phys.: Conf. Ser.

Self Cite

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“…To achieve this goal, research are focused on achieving effective syngas clean-up and purification and the development of new catalysts [25][26][27][28][29]. Gasification technology is being used to produce a variety of chemicals such as methane, methanol, ammonia, hydrogen, and sustainable aviation fuels [30][31][32][33][34][35][36], which can help reduce the reliance on fossil fuels for chemical production. This approach, coupled with CCS technology to capture and store carbon emissions, has the potential to significantly reduce greenhouse gas emissions from the chemical and energy sector [16].…”

Section: Introductionmentioning

confidence: 99%

Costs of Gasification Technologies for Energy and Fuel Production: Overview, Analysis, and Numerical Estimation

Lourinho

Alves

Garcia³

et al. 2023

Recycling

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During recent years, gasification technology has gained a high potential and attractiveness to convert biomass and other solid wastes into a valuable syngas for energy production or synthesis of new biofuels. The implementation of real gasification facilities implies a good insight of all expenses that are involved, namely investments required in equipment during the project and construction phases (capital expenditures, CapEx) and costs linked to the operation of the plant, or periodic maintenance interventions (operational expenditures, OpEx) or costs related to operations required for an efficient and sustainable performance of a gasification plant (e.g., feedstock pre-treatment and management of by-products). Knowledge of these economic parameters and their corresponding trends over time may help decision-makers to make adequate choices regarding the eligible technologies and to perform comparisons with other conventional scenarios. The present work aims to provide an overview on CapEx associated with gasification technologies devoted to convert biomass or solid waste sources, with a view of reducing the carbon footprint during energy generation or production of new energy carriers. In addition, an analysis of technology cost trends over time using regression methods is also presented, as well as an evaluation of specific capital investments according to the amount of output products generated for different gasification facilities. The novelty of this work is focused on an analysis of CapEx of existing gasification technologies to obtain distinct products (energy and fuels), and to determine mathematical correlations relating technology costs with time and product output. For these purposes, a survey of data and categorization of gasification plants based on the final products was made, and mathematical regression methods were used to obtain the correlations, with a statistical analysis (coefficient of determination) for validation. Specific investments on liquid biofuel production plants exhibited the highest decreasing trend over time, while electricity production became the least attractive solution. Linear correlations of specific investment versus time fitted better for electricity production plants (R2 = 0.67), while those relating the product output were better for liquid biofuel plants through exponential regressions (R2 = 0.65).

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“…Biomass has been thermochemically converted into different products, such as oil, char, and chemicals as well as syngas [ 7 , 8 , 9 , 10 , 11 , 12 ]. Among various thermochemical technology, gasification is considered as the most promising approach because the produced gas can be used in many fields [ 13 , 14 , 15 , 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of an Improved Updraft Biomass Gasifier Based on Aspen Plus

Zhu

Shen

et al. 2022

IJERPH

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In this paper, numerical investigation and optimization is conducted upon an improved updraft gasifier which is expected to overcome the weakness of conventional updraft gasifier. The comprehensive Aspen Plus model of the improved updraft gasifier is based on the RYield and RCSTR reactor. The tar prediction model is constructed, and the yield of tar is determined by the volatile of biomass and gasification temperature. The Aspen Plus simulation results agree very well with experiment results for the product yields and gasification efficiency, which shows the accuracy of the Aspen Plus model. The tar content in syngas of the improved gasifier is proved to be much lower than that of the conventional one by this model. The inflection point of the gasification efficiency occurs when air ratio is 0.25, and the optimum steam proportion in the air is 7.5%. Such a comprehensive investigation could provide necessary information for the optimal design and operation of the improved updraft gasifier.

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Numerical analysis of bio-methane production from biomass-sewage sludge oxy-steam gasification and methanation process

Cited by 20 publications

References 29 publications

Biomass oxy-CO₂ gasification process for bio-methane production: an experimental and numerical activity

Biomass oxy-CO₂ gasification process for bio-methane production: an experimental and numerical activity

Costs of Gasification Technologies for Energy and Fuel Production: Overview, Analysis, and Numerical Estimation

Numerical Simulation of an Improved Updraft Biomass Gasifier Based on Aspen Plus

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Numerical analysis of bio-methane production from biomass-sewage sludge oxy-steam gasification and methanation process

Cited by 20 publications

References 29 publications

Biomass oxy-CO2 gasification process for bio-methane production: an experimental and numerical activity

Biomass oxy-CO2 gasification process for bio-methane production: an experimental and numerical activity

Costs of Gasification Technologies for Energy and Fuel Production: Overview, Analysis, and Numerical Estimation

Numerical Simulation of an Improved Updraft Biomass Gasifier Based on Aspen Plus

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Product

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Biomass oxy-CO₂ gasification process for bio-methane production: an experimental and numerical activity

Biomass oxy-CO₂ gasification process for bio-methane production: an experimental and numerical activity