Co-gasification of municipal solid waste and biomass in a commercial scale downdraft gasifier

Bhoi, Prakash; Huhnke, Raymond L.; Kumar, Ajay; Indrawan, Natarianto; Thapa, Sunil

doi:10.1016/j.energy.2018.08.151

Cited by 113 publications

(40 citation statements)

References 12 publications

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“…This phenomenon indicates that the promotion of temperature is more evident than O 2 in lower oxygen concentrations. Although there were few studied on MSW gasification under medium temperatures, the trends of the syngas components were similar with MSW gasification research [11,20,21]. The volume fractions of syngas components at 650 • C were in agreement with Dong's research [21], lower than the pilot gasifier [11], slightly better than that in Liu' study [20].…”

Section: Effects Of Temperature and Oxygen Concentrationsupporting

confidence: 80%

“…The main syngas composition was CO, CH 4 , CO 2 , and H 2 [7,11,25,28], which were analyzed by an ecom J2KN Pro gas analyzer (Ecom GmbH, Iserlohn, Germany) in the present study, and the total gas volumes were obtained by integral calculation. A further devolatilization test was conducted for the solid residue in an elevator furnace (Yixing Feida electric furnace Co., Ltd., Yixing, China) at 900 • C. The liquid product was captured into the isopropanol solution (Chengdu Chron chemical CO., Ltd., Chengdu, China) located in an ice bath.…”

Section: Analysis Methodsmentioning

confidence: 99%

“…In the past few years, a number of studies have begun to investigate the novel waste-to-energy (WtE) treatments: pyrolysis (no oxygen) and gasification (partial oxygen). Then, MSW gasification was tested in various facilities, such as a semi-industrial fluidized bed plant [8,9], a "two-step" facility [10], a downdraft gasifier [11], a fixed bed gasifier [12], and a pilot plasma furnace [13], and all of the MSW gasification research was operated above 700 • C, and even higher in the plasma [13]. The research in Reference [14] has indicated that the economic and environmental performances of MSW gasification had some advantages, and MSW gasification can also be operated commercially.…”

Section: Introductionmentioning

confidence: 99%

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Analyses for Synthesis Gas from Municipal Solid Waste Gasification under Medium Temperatures

Jin

et al. 2020

Processes

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Municipal solid waste (MSW) gasification could be a novel method that shows the various advantages over traditional MSW treatments in China. Other research concluded that MSW gasification was operating by the assistant heat, and the gasification may occur under medium temperature. So, this study is aimed to investigate MSW gasification and pyrolysis behavior and analyze the syngas evolution and reaction mechanism. The MSW samples were collected in daily life and the experiments were carried out in a fixed tubular reactor below 650 °C. The effects of medium temperature and oxygen content on syngas quality were elucidated in depth. The results have shown that temperature can promote the syngas quality in the range of 550–650 °C, because the increasing temperature strengthens the reaction rate. The oxygen content should be controlled in a certain range, or oxidation reactions will be more prominent during gasification. The optimal gasification condition in this study was obtained at 650 °C and an oxygen concentration of 1.25%, the combustible gas yield and the lower heating value (LHV) of syngas of this condition were 0.296 L/g and 10.98 kJ/L, respectively. This study provides insights for MSW gasification under medium temperature, and a practical gasification system can be designed under a certain condition.

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Section: Effects Of Temperature and Oxygen Concentrationsupporting

confidence: 80%

Section: Analysis Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Analyses for Synthesis Gas from Municipal Solid Waste Gasification under Medium Temperatures

Jin

et al. 2020

Processes

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“…Co-gasification of MSW with switchgrass cuttings, by means of a small commercial-scale downdraft gasifier (100 kg/h), indicates that co-gasification of up to 40% MSW performed satisfactorily. The heating values of syngas were 6.2, 6.5, and 6.7 MJ/Nm 3 for co-gasification ratios of 0, 20, and 40%, respectively; in the same cases, the cold and hot gas efficiencies were 60.1, 51.1, and 60.0% and 65.0, 55.2, and 64.4% [15]. Eghtedaei et al also analyzed co-gasification with biomass and found an improvement in the H 2 concentration [16].…”

Section: Introductionmentioning

confidence: 81%

Waste to Energy and Syngas

Posada¹,

Saenz²

2019

Sustainable Alternative Syngas Fuel [Working Title]

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Getting energy from waste is one of the best alternatives for sustainable handling of waste. Mass burning is generally the preferred option. Usually, this applies to large facilities where more than 500 tons of waste per day are treated. Syngas production from waste has also been tried with mixed success. This chapter reviews the situation in this field and proposes an alternative based on co-combustion with coal as a possible route, applied preferably to treat municipal solid waste (MSW) and biosolids from small-or medium-sized municipalities, producing less than 200 tons of waste per day, with the aim of generating electric energy. For this, a theoretical model is proposed and applied to a specific case.

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“…Among these conversion techniques, thermochemical gasification shows a promising approach to convert DDWS into clean syngas fuel. Syngas is mainly a mixture of combustible gases such as H2, CO and CH4, and noncombustible gases such as CO2 and N2 [5,6]. The gasification is a complex process that includes drying, pyrolysis, combustion, and reduction processes, as elaborated by Diyoke et al [7].…”

Section: Introductionmentioning

confidence: 99%

Fuel Characterization Study and Simulation of Dewatered Domestic Wastewater Sludge Gasification Using ASPEN Plus

Ali¹,

Akıllı²

2019

acperpro

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Dewatered domestic wastewater sludge (DDWS) is one of the largest contributors of waste material in the world, and it immediately elevates local environmental problems, especially in the urban area. The conversion of this material into a usable form of green energy, such as syngas through gasification, can be a vital solution. Hence, this method not only solves the environmental issues related to DDWS disposal but also participates as an energy source. To achieve this goal, the essential fuel characterization, which includes initial moisture content, high heating value, ultimate analysis, and proximate analysis, were carried out to assess the potential energy in DDWS. Due to the high expenses of the successful design of the gasifier reactor, and there are no efficient methods to predict the gasification performance, the model of the DDWS gasification process using ASPEN Plus software was developed. As ASPEN Plus software does not contain a built-in gasifier reactor model, a combination of various reactors is used to simulate the gasification processes. These processes were divided out into two stages. In the first stage, DDWS was decomposed into its element by specifying yield distribution. By using Gibbs free energy minimization approach, the gasification reactions were modeled. The current model was validated with the previously published work. From the characterization findings, DDWS showed high initial moisture content 84.64% and potential energy with 16.84 MJ/kg high heating value. The proximate analysis based on the dry base of DDWS exhibited that more than 55.42 % of their mass is composed of volatile materials, and ash content is found to be less than 25.79%. The elemental of carbon, hydrogen, nitrogen, sulfur, and oxygen component in the DDWS sample was 34.29%, 5.20%, 5.80%, 3.12%, and 25.80%, respectively. By applying operating parameters, which include reaction temperature, reaction pressure, airflow rate, and moisture content, it's found that the increase in reaction temperature (673-1673K) enhanced the production of CO and H2 while increasing reaction pressure adversely affected the generation of H2 and CO. The increase in the airflow rate increases CO2 mole fraction in syngas and shift the gasification process to combustion. The heating value of syngas sharply decreased with the increase in the DDWS moisture content. From the simulation results, ASPEN Plus simulator software is presented with the high capability to be used as a predictive tool for optimization of the gasifier performance.

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Co-gasification of municipal solid waste and biomass in a commercial scale downdraft gasifier

Cited by 113 publications

References 12 publications

Analyses for Synthesis Gas from Municipal Solid Waste Gasification under Medium Temperatures

Analyses for Synthesis Gas from Municipal Solid Waste Gasification under Medium Temperatures

Waste to Energy and Syngas

Fuel Characterization Study and Simulation of Dewatered Domestic Wastewater Sludge Gasification Using ASPEN Plus

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