Combustion of sewage sludge in a fluidized bed of catalyst: ASPEN PLUS model

Fedorov, A. P.; Dubinin, Yu. V.; Fedorov, I. A.; Shelest, S.N.; Yakovlev, V. А.

doi:10.1016/j.jhazmat.2020.124196

Cited by 25 publications

(6 citation statements)

References 38 publications

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“…A lower temperature can be used if halogen gas is introduced as the fluidization gas. Several patents describe EHFB purification of graphite. ,,,,, Some of the earlier research on this topic was conducted at Iowa State University, ,, while more recent work has been reported by T&MEC. , A schematic representation of the T&MEC EHFB is shown in Figure . Heating was provided by a DC electrical current applied in a radial direction to the center electrode and the interior wall of the reactor.…”

Section: Applicationsmentioning

confidence: 99%

Electrically Heated Fluidized Beds─A Review

Ahmed,

Duchesne,

Tan

et al. 2024

Ind. Eng. Chem. Res.

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Fluidized beds heated via fossil fuel combustion have been widely used in industry for various applications. Heating these fluidized beds with clean electricity is emerging as a promising solution to reduce greenhouse gas emissions, improve overall energy efficiency, and for some applications, improve product quality. This review covers the development status of electrically heated fluidized beds (EHFBs) with a variety of heating principles, including Joule heating, induction heating, electromagnetic irradiation, sonication, plasma heating and gas preheating. An analysis of the advantages and disadvantages of these heating principles is presented, along with their suitability for different applications. Current and potential industrial applications using EHFBs for highly diversified processes, from material processing and biomass gasification to space exploration, are highlighted. Each application presents its own unique opportunities and challenges. The selection of a method to deliver electrical heat depends on the specific purpose of each application, materials involved, and the required configuration of the EHFB. Hence, methods to assess key performance indicators are described. To date, only a few applications have been commercialized, mostly for drying and material processing. Recommendations for EHFB advancement are provided so that their full potential can be realized.

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Section: Applicationsmentioning

confidence: 99%

Electrically Heated Fluidized Beds─A Review

Ahmed,

Duchesne,

Tan

et al. 2024

Ind. Eng. Chem. Res.

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“…At the Boreskov Institute of Catalysis, the technology based combustion in a fluidized bed of a deep oxidation catalysts has been developed, that was successfully tested for combustion of various fuels [13,14], including such difficult to utilize ones like shale heavy coal-tar products [15], heavy high-sulfuric oils [16,17], as well as sewage sludge [18]. The use of the deep oxidation catalyst for fuel combustion allows heat production and extraction to be carried out within the same fluidized bed at a near stoichiometric air-to-fuel ratio.…”

Section: Introductionmentioning

confidence: 99%

Green approach to production of porous char adsorbents via oxidative carbonization in fluidized catalyst bed

Yeletsky,

Yazykov,

Dubinin

et al. 2024

Nanosystems: Phys. Chem. Math.

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A green and energy-efficient technique for production of porous carbon-mineral chars from agricultural wastes (rice husk, wheat bran) and sedimentary carbonaceous feedstocks (high-ash peat, coal) was developed. It is based on partial combustion in fluidized bed of a deep oxidation catalyst at low temperatures (465 -600 • C). This technique yields porous chars with an elevated mineral content that depends on a feedstock used, and gaseous products of complete oxidation. It was found that the obtained chars have developed porosity with BET specific surface area of ca. 50 -170 m 2 g −1 , pore volume of 0.05 -0.17 ml•g −1 , and ash content of 16 -79 wt. %. They were additionally characterized by TGA and FTIR. Their testing as adsorbents for heavy metal ions (by the example of Cu 2+ ) and organic dyes (by the example of methyl green) revealed that their adsorption capacities are comparable to those of chars produced by the conventional pyrolytic approaches. KEYWORDS biochar, biomass, rice husk, bran, fluidized catalyst bed, composite

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“…At the same time formation of NO x and SO x gases were not considered in this particular study, as well. More recent model for the sewage sludge thermal decomposition in an FBR unit by Fedorov et al (2021), adapted a simple reaction kinetics. In particular, seven reactions were considered for carbon conversion into carbon monoxide with a further oxidation to carbon dioxide.…”

Section: Introductionmentioning

confidence: 99%

Flue gas analysis for biomass and coal co-firing in fluidized bed: process simulation and validation

Zhakupov

Kulmukanova

Sarbassov

et al. 2022

Int J Coal Sci Technol

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Coal-conversion technologies, although used ubiquitously, are often discredited due to high pollutant emissions, thereby emphasizing a dire need to optimize the combustion process. The co-firing of coal/biomass in a fluidized bed reactor has been an efficient way to optimize the pollutants emission. Herein, a new model has been designed in Aspen Plus® to simultaneously include detailed reaction kinetics, volatile compositions, tar combustion, and hydrodynamics of the reactor. Validation of the process model was done with variations in the fuel including high-sulfur Spanish lignite, high-ash Ekibastuz coal, wood pellets, and locally collected municipal solid waste (MSW) and the temperature ranging from 1073 to 1223 K. The composition of the exhaust gases, namely, CO/CO2/NO/SO2 were determined from the model to be within 2% of the experimental observations. Co-combustion of local MSW with Ekibastuz coal had flue gas composition ranging from 1000 to 5000 ppm of CO, 16.2%–17.2% of CO2, 200–550 ppm of NO, and 130–210 ppm of SO2. A sensitivity analysis on co-firing of local biomass and Ekibastuz coal demonstrated the optimal operating temperature for fluidized bed reactor at 1148 K with the recommended biomass-to-coal ratio is 1/4, leading to minimum emissions of CO, NO, and SO2.

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Combustion of sewage sludge in a fluidized bed of catalyst: ASPEN PLUS model

Cited by 25 publications

References 38 publications

Electrically Heated Fluidized Beds─A Review

Electrically Heated Fluidized Beds─A Review

Green approach to production of porous char adsorbents via oxidative carbonization in fluidized catalyst bed

Flue gas analysis for biomass and coal co-firing in fluidized bed: process simulation and validation

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