Fluidized Bed Combustion Articles
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Biomass alternative fuel: co-combustion of coal explodes!
Biomass fuel blending in Europe Europe has used biomass fuels on a large scale for more than 30 years. The UK has adopted the direct-fired co-combustion route for large coal-fired power plants and has continuously increased the proportion of biomass coupling. Through policy drive, cost management and safety control, it achieved multiple 100% biomass-fired thermal power plants in 2018. ...
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Installation of DFB Gasifier in progress at full swing for Edison Power at Diago, Japan - Case Study
GP Energy has completed entire supply of Double Fluidized Bed Gasifier for Edison Power at Diago, Japan. Installation work is in progress at full ...
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10 ton CFB Power Plant Boiler
This type of boilers is very popular in recent years. Energy saving circulating fluidized bed power plant boiler mainly used for large central heating, thermal power plants to generate electricity or other purposes Type: ZG Capacity/Hot Power:35 ~ 670t/h ZG Pressure: 1.25 ~ 13.7 MPa ZG Temperature: 450 ~ 560 ? Energy-saving circulating fluidized bed power plant ...
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Integration of Fischer-Tropsch fuel production with a complex oil refinery
The oil refining industry is facing harder policies on renewable content in its products. One way to meet this is to produce diesel and gasoline from gasification of biomass via a Fischer-Tropsch (FT) synthesis. In this paper, heat integrating a biomass-to-FT syncrude process with a refinery is compared to a stand-alone biomass-to-FT syncrude process, in terms of the consequences for GHG ...
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Influence of bed height on the quality of rice husk ash in a fluidised bed combustor
The purpose of this study was to investigate the effect of bed height on the quality of rice husk ash in a 210–mm diameter pilot scale fluidised bed combustor. The degree of rice husk burning in the fluidised bed could be deduced from the temperature of the combustor and the particle size of the resulting ash. The turbulence in the bed would break down the char skeleton of the rice husk ...
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Heavy metals in wet scrubber residue from a medium–sized (32 MW) municipal district heating plant incinerating wood and peat in a fluidised bed boiler
Due to the low total concentrations of heavy metals and extractable compounds, it is recommended that the wet scrubber residue be used as a construction agent instead of being disposed of in landfills. According to five–stage sequential extraction, the highest concentrations of most of the heavy metals occurred in the residual fraction (i.e., HF + HNO3 + HCl), which means that the heavy metals in ...
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N-butane partial oxidation to maleic anhydride under transient regimes
Maleic anhydride (MA) is commercially produced from partial oxidation of n-butane by air over vanadium pyrophosphate (VPP) catalyst. There has been a huge research interest to better understand the different aspects of this industrially attractive reaction including mechanism, dynamic catalyst phase evolutions as well as the effect of redox operating conditions such as gas/solid residence time, ...
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Hydrogen production through chemical looping using NiO/NiAl2O4 as oxygen carrier
A new autothermal route to produce hydrogen from natural gas via chemical looping technology was investigated. Nowadays, 90% of the worldwide produced hydrogen comes from fossil fuels, the most common process being Steam Methane Reforming (SMR), which produces several kg of CO2 equivalent per kg of hydrogen. In classic SMR technology, most of the greenhouse gases are vented to the atmosphere. ...
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Air gasification of Malaysia agricultural waste in a fluidised bed gasifier
Hydrogen production from agricultural waste has been investigated experimentally using a bench-scale fluidised bed gasifier with 60 mm diameter and 425 mm height. During the experiments, the fuel properties and the effects of operating parameters such as gasification temperatures (800?900?C), fluidisation ratio (2.0?3.33 m/s), static bed height (10?30 mm) and equivalence ratio (0.16?0.46) were ...
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Fluidised bed combustion and gasification of rice husk and rice straw – a state of art review
Rice is cultivated in all the main regions of world. The worldwide annual rice production is 666 million tons for the year 2008. The combustion and gasification of rice husk/rice straw in fluidised bed reactors seems to be an attractive possibility of future for power generation, the solution of waste disposal problems and the reduction of greenhouse gases. In this paper, overview of fluidised ...
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Low-emission coal burning technology
Customer: Foster Wheeler Energy, Siemens, EnergoProjekt Katowice Challenge: One third of carbon dioxide emissions caused by humans come from the burning of fossil fuels in energy production. How to reduce them? Solution: Developing a circulating fluidised bed (CFB) boiler where fossil fuels are combusted with pure oxygen separated from the air. Key benefits: 15-20 per cent lower carbon dioxide ...
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Hydrogen production by catalytic methane decomposition and catalyst regeneration by oxygen mixtures in fluidised and fixed bed reactors
In the present paper, the Thermo-Catalytic Decomposition (TCD) of methane has been investigated in a laboratory-scale bubbling fluidised bed reactor using copper dispersed on γ-alumina as a catalyst. The usefulness of a fluidised bed operation instead of a fixed bed operation has been assessed in terms of methane-to-hydrogen conversion and the amount of carbon accumulated on the catalyst. The ...
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Low-volatile coal combustion technologies in Vietnam: issues and strategies
Vietnam has planned to install a number of coal-fired power plants with unit's capacity of up to 600 MW. Present experience shows that available low volatile anthracite coal is difficult to burn in the PC fired boilers. In this paper, the CFB combustion technology is proposed based on the experiences of coal-fired power plants around the world used similar coal characteristics. Later, a ...
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Techno-economic evaluation of revamping of coal-fired power plants in India
A techno-economic feasibility study has been conducted to investigate the revamping of two 32 MWe Pulverised-Coal (PC) boilers with a number of firing options. The options investigated were: (1) conventional PC revamping, (2) replacement with a new PC boiler, (3) PC to Circulating Fluidised Bed (CFB) revamping, (4) replacement with a new CFB boiler, and (5) Bubbling Fluidised Bed (BFB) revamping. ...
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Cleaning Up Gasification Syngas
Documento sin título Introduction By definition, gasification is the art of changing a non-gaseous substance, such as a liquid or a solid, into a gas. By this definition, processes such as combustion, anaerobic digestion and pyrolysis would be classified as gasification. However, in today’s world, gasification is defined as any process, which produces a “synthesis gas” or a ...
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Catalytic boilers with catalytic fluidised bed
In this paper, conditions of work, special features and problems of boilers with catalytic fluidised bed are described. The specific conditions, when the catalyst layer remains stationary and granular or becomes spouting, are also considered. There are some main zones in the catalytic boilers with fluidised bed, which characterise such boilers and which must exist in them under normal working ...
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Design of boilers with catalytic fluidised bed and their connection to heat supply system
The new advantage of catalytic boiler consisting of the location of heat source near the consumer is described. It imposes some restrictions on the design of such a boiler, which is based on the zonal arrangement approach. The details of such design of boilers with catalytic fluidised bed intended for different purposes (water heating, steam generation, steam superheating) are considered and, in ...
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Some theoretical fundamentals of catalytic fuel combustion
In the following paper, the special features of catalytic combustion, which are distinct from the developed theory of flame combustion are considered. They are connected with the properties and characteristics of catalysts, the developed surface for reaction and the comparatively low catalysts' temperatures. They determine the rate of catalytic reaction and the corresponding three main regions of ...
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Two-stage fuel oxidation and comparison of water catalytic boilers with fluidised bed and fixed layer
The new method of decreasing NOx emissions in catalytic boilers consisting of two-stage (two-chamber) fuel oxidation is presented in the following paper. The corresponding plant and parameters in it are described. The second part of article contains the comparison of technical and economic characteristics of Russian and foreign hot water catalytic boilers with fluidised bed and fixed ...
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The impacts of technological learning on the optimum technology mix: simulations for the Indian power sector
For the investigation of the optimum technology mix of any country, which is clearly an issue of dynamic nature, technological learning and economies of scale play a significant role. Hence, in this paper's long term planning exercise for the Indian power sector (2000-2025), our simulation analysis specifically includes the impacts of technological learning on the optimal inter-temporal choice of ...
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