Recent advances in thermodynamic analysis of biomass gasification: A review on numerical modelling and simulation

Ajorloo, Mojtaba; Ghodrat, Maryam; Scott, Jason; Strezov, Vladimir

doi:10.1016/j.joei.2022.05.003

Cited by 76 publications

(30 citation statements)

References 164 publications

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“…Известны затруднения, связанные с использованием результатов экспериментальных испытаний конкретных конструкций для создания других конструкций, отличающихся видом используемой биомассы и режимными характеристиками. Поэтому изучению процессов термической переработки биомассы и их математическому моделированию уделяется большое внимание [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Моделирование процессов проводят чаще всего с использованием равновесных или кинетических подходов [1,5].…”

Section: введение литературный обзорunclassified

“…Моделирование процессов проводят чаще всего с использованием равновесных или кинетических подходов [1,5]. Наряду с равновесными и кинетическими моделями находят применение модели на основе методов CFD-моделирования и искусственных нейронных сетей [2,4,6,7,9,10].…”

Section: введение литературный обзорunclassified

“…При выполнении исследований принято, что условная биомасса представляет собой механическую смесь органической и минеральной частей с определенным влагосодержанием. Элементный состав условной биомассы был принят на основе анализа и обобщения известных данных [1,2,7,10] При моделировании процессов газификации использована нестехиометрическая модель, основанная на предположении, что химически реагирующая многокомпонентная смесь находится в состоянии термодинамического и химического равновесия, которому соответствует минимальное значение изобарно-изотермического потенциала. В конденсированной фазе находятся частицы золы, а также, в зависимости от условий организации процессов, может присутствовать часть углерода.…”

Section: материалы и методыunclassified

See 2 more Smart Citations

Environmental characteristics of thermal utilization of waste with external and internal supply of thermal energy

Демин

Demina

2023

«Izvestiya vysshikh uchebnykh zavedenii. PROBLEMY ENERGETIKI»

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THE PURPOSE. Identification of optimal regimes for autothermal and allothermic methods of gasification of plant biomass in terms of energy parameters of generator gases, as well as determination of environmental indicators during subsequent combustion of generator gases to obtain thermal energy.METHODS. When modeling gasification processes, a nonstoichiometric model was used, based on the assumption that a chemically reacting multicomponent mixture is in a state of thermodynamic and chemical equilibrium, which corresponds to the minimum value of the isobaric-isothermal potential. When modeling the combustion of generator gas in a mixture with air, a kinetic model of a perfectly mixed flow reactor was used and the detailed mechanism of chemical interaction for the C-H-O-N-S reacting system was taken into account. The calorific value of generator gas obtained by steam gasification and external supply of thermal energy is significantly higher than the calorific value of gas obtained by internal supply of thermal energy. However, the values of the energy potential and thermochemical efficiency are very close for both types of gasification.RESULTS. For plant biomass with a given averaged elemental composition, gasification conditions are determined that increase the degree of conversion of initial materials into generator gas. In particular, for the autothermal gasification method, the maximum calculated values of the energy potential of dry ash-free generator gas and thermochemical efficiency were obtained at an excess air coefficient α ≈ 0.32. For the allothermic gasification method, the maximum calculated values of the energy potential of the generator gas and the thermochemical efficiency correspond to the gasification temperature range T ≈ 1050 -1100 K and the mass fraction of the supplied steam gH2O ≈ 0.217. To ensure these conditions, it will be necessary to supply thermal energy through combustion of ≈ 37 wt. % generator gas. Generator gas produced by the allothermic method has higher energy performance, and the negative impact on the environment during its subsequent combustion is characterized by lower specific CO and CO2 emissions in terms of a ton of reference fuel.

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Section: введение литературный обзорunclassified

Section: материалы и методыunclassified

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Environmental characteristics of thermal utilization of waste with external and internal supply of thermal energy

Демин

Demina

2023

«Izvestiya vysshikh uchebnykh zavedenii. PROBLEMY ENERGETIKI»

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“…However, there are other factors that affect gasification besides the carbon component. Typically, the CO, methane, and H 2 gas components in the final composition of syngas emerge from reactions between hydrogen and oxygen elements obtained from oxidants and moisture in the gasification process . Therefore, the feedstock characterizations of various biomass–plastic feedstocks utilized for co-gasification with their calorific value is reported in Table .…”

Section: Lignocellulosic Biomass (Lcb) and Plastic Feedstock Characte...mentioning

confidence: 99%

A Critical Outlook on Lignocellulosic Biomass and Plastics Co-Gasification: A Mini-Review

2022

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The generation of solid waste and lignocellulosic biomass (LCB) residues and their environmentally responsible disposal have emerged as major global challenges. A major part (around 12%) of solid waste is plastic, and the increased accumulation has become a serious public health and environmental hazard. For the combined management of residual LCB biomass and plastic waste, thermochemical conversion, particularly gasification, appears to be a potential alternative. Gasification is a process that turns high carbon-containing solid feedstocks into a combustible gas mixture known as syngas or producer gas based on the gasifying agent. Co-gasification (the gasification of two distinct feedstocks) has the potential to facilitate eco-friendly plastic waste disposal while also contributing to the production of green energy. The literature on the co-gasification of LCB and plastic waste is reviewed in the current study. These are mostly experimental studies on biomass and plastics carried out in various reactors with multiple gasifying mediums. The synergistic effects of various feedstock compositions and attributes are examined during co-gasification using experimental studies and reactor-level modeling. The impacts of operating parameters on the gas yield, tar formation, and gasifier performance are also analyzed. Finally, the challenges, research gaps, and the way toward commercialization in the context of co-gasification of various combinations of LCB and plastics are presented.

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“…Many Aspen Plus simulation [ 28 , 29 , 30 , 31 , 32 , 33 ] on updraft gasification have been carried out to investigate the effects of operating conditions on the gasification characteristics, such as temperature, biomass raw materials, types of gasification agents, and so on. Ismail et al [ 34 ] constructed a two-dimensions simulation model using COMMENT code and investigated the gasification and combustion process in an updraft gasifier.…”

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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Recent advances in thermodynamic analysis of biomass gasification: A review on numerical modelling and simulation

Cited by 76 publications

References 164 publications

Environmental characteristics of thermal utilization of waste with external and internal supply of thermal energy

Environmental characteristics of thermal utilization of waste with external and internal supply of thermal energy

A Critical Outlook on Lignocellulosic Biomass and Plastics Co-Gasification: A Mini-Review

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

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