scholarly journals Possibilities of Using By-Products in the Circular Production Process in Biogas Power Plants

2020 ◽  
Author(s):  
Nikola Dražić ◽  
Gordana Dražić ◽  
Nikola Rakašćan
Keyword(s):  
Production Process ◽  
Power Plants ◽  
By Products

The Latest Research in Mongolia on the Utilization of Coal Combustion By-Products

2021 ◽  
Vol 323 ◽  
pp. 8-13
Author(s):  
Jadambaa Temuujin ◽  
Damdinsuren Munkhtuvshin ◽  
Claus H. Ruescher
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Coal Combustion ◽  
Power Plants ◽  
Thermal Power ◽  
Thermal Power Plants ◽  
Power Stations ◽  
Thermal Power Stations ◽  
Coal Ashes ◽  
By Products

With a geological reserve of over 170 billion tons, coal is the most abundant energy source in Mongolia with six operating thermal power stations. Moreover, in Ulaanbaatar city over 210000 families live in the Ger district and use over 800000 tons of coal as a fuel. The three thermal power plants in Ulaanbaatar burn about 5 million tons of coal, resulting in more than 500000 tons of coal combustion by-products per year. Globally, the ashes produced by thermal power plants, boilers, and single ovens pose serious environmental problems. The utilization of various types of waste is one of the factors determining the sustainability of cities. Therefore, the processing of wastes for re-use or disposal is a critical topic in waste management and materials research. According to research, the Mongolian capital city's air and soil quality has reached a disastrous level. The main reasons for air pollution in Ulaanbaatar are reported as being coal-fired stoves of the Ger residential district, thermal power stations, small and medium-sized low-pressure furnaces, and motor vehicles. Previously, coal ashes have been used to prepare advanced materials such as glass-ceramics with the hardness of 6.35 GPa, geopolymer concrete with compressive strength of over 30 MPa and zeolite A with a Cr (III) removal capacity of 35.8 mg/g. Here we discuss our latest results on the utilization of fly ash for preparation of a cement stabilized base layer for paved roads, mechanically activated fly ash for use in concrete production, and coal ash from the Ger district for preparation of an adsorbent. An addition of 20% fly ash to 5-8% cement made from a mixture of road base gave a compressive strength of ~ 4MPa, which exceeds the standard. Using coal ashes from Ger district prepared a new type of adsorbent material capable of removing various organic pollutants from tannery water was developed. This ash also showed weak leaching characteristics in water and acidic environment, which opens up an excellent opportunity to utilize.

Effects of the Different Crystallization Time on Synthesis of Zeolite 4A from by-Products of Polysilicon Production Process

2011 ◽  
Vol 347-353 ◽  
pp. 246-251
Author(s):  
Xing Yong Liu ◽  
Min Li ◽  
Hong Chen ◽  
Wei Wei
Keyword(s):  
Production Process ◽  
Degree Of Crystallinity ◽  
Crystallization Time ◽  
Crystallinity Degree ◽  
Structure Morphology ◽  
Zeolite 4A ◽  
Single Structure ◽  
Ft Ir ◽  
The Degree Of Crystallinity ◽  
By Products

Pure form,single phase and high crystalline zeolite 4A samples were synthesized during hydrothermal treatment of by-products in polysilicon production process. The effects of the different crystallization time on the degree of crystallinity, skeleton structure, morphology, size of the particle and its distribution of zeolite 4A samples were investigated using XRD,FT-IR,SEM and Zetasizer. The results indicated that the zeolite 4A sample featured high crystallinity degree, excellent dispersivity, high purity and single structure.

scholarly journals Evaluation of the application for new alternative biodiesel production process for rendered fat including Category 1 animal by‐products (BDI‐RepCat® process, AT)

EFSA Journal ◽  
2021 ◽  
Vol 19 (4) ◽  
Author(s):  
◽  
Konstantinos Koutsoumanis ◽  
Ana Allende ◽  
Declan Bolton ◽  
Sara Bover‐Cid ◽  
...  
Keyword(s):  
Production Process ◽  
Biodiesel Production ◽  
Rendered Fat ◽  
By Products

scholarly journals A BIM-driven framework for integrating rules and regulations in the decommissioning of nuclear power plants

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Akponanabofa Henry Oti ◽  
Peter Farrell ◽  
Fonbeyin Henry Abanda ◽  
Paul McMahon ◽  
Abdul-Majeed Mahamadu ◽  
...  
Keyword(s):  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Building Information Modelling ◽  
Content Type ◽  
Nuclear Plants ◽  
Task Requirements ◽  
Building Information ◽  
Query System ◽  
By Products

Purpose The relatively low capital cost and contributions to mitigating global warming have favoured the continuous construction and operation of nuclear power plants (NPPs) across the world. One critical phase in the operation of nuclear plants for ensuring the safety and security of radioactive products and by-products is decommissioning. With the advent of digital twinning in the building information modelling (BIM) methodology, efficiency and safety can be improved from context-focus access to regulations pertaining to demolition of structures and the cleaning-up of radioactivity inherent in nuclear stations. The purpose of this study, therefore, is to propose a BIM-driven framework to achieve a more regulation-aware and safer decommissioning of nuclear power plants. Design/methodology/approach The framework considers task requirements, and landscape and environmental factors in modelling demolition scenarios that characterise decommissioning processes. The framework integrates decommissioning rules/regulations in a BIM linked non-structured query system to model items and decommissioning tasks, which are implemented based on context-focussed retrieval of decommissioning rules and regulations. The concept’s efficacy is demonstrated using example cases of digitalised NPPs. Findings This approach contributes to enhancing improvements in nuclear plant decommissioning with potential for appropriate activity sequencing, risk reduction and ensuring safety. Originality/value A BIM-driven framework hinged on querying non-structured databases to provide context-focussed access to nuclear rules and regulations and to aiding decommissioning is new.

scholarly journals Physiognomies and Strength Investigation of Concrete Part Blended by Wood Ash

2021 ◽  
pp. 143-155
Author(s):  
Smruti Saswati Dash ◽  
Siba Prasad Mishra ◽  
Sagarika Panda
Keyword(s):  
Power Plants ◽  
Chemical Constituents ◽  
Paper Industry ◽  
Testing Machine ◽  
Wood Ash ◽  
Wood Dust ◽  
Universal Testing ◽  
Compressive Testing ◽  
Strength And Durability ◽  
By Products

Introduction: Cement during its manufacture emits enormous CO2, and heat to the atmosphere and deteriorate the environment affecting its sustainability. Wood ashes (WA) are the by-products wood based power plants, timber mills as wood dust, barks from forestry, paper industry, and forest fire are simple wastes and are noxious to atmosphere. Present study is investigating the strength and durability of concrete when blended with 0%, 10%, 30%, and 40% wood ash replacing cement to have these wastes effective waste management. Methodology: The process of investigation is to find the chemical constituents of fly ash, and its suitability to part substitute cement by using X-ray fluorescent spectrometer (XRF), and digital compressive testing machine (CTM) and Universal Testing Machine (UTM) to verify the physical, chemical, and mechanical properties to assess appropriate strength of wood ash blended concrete (WABC). Results: Strength characteristic at various proportion of mix of (WABC) on testing exhibited decreasing trend on increasing WA percent. The blended concrete exhibited the required compressive strength at 10% addition of WA and after curing for 28days. By utilizing wood ash as cement substitute the environment can be saved from black carbon and further deterioration. 

Use of Unconventional Fuels in Gas Turbines

2000 ◽  
Author(s):  
Dilip K. Mukherjee
Keyword(s):  
Heavy Oil ◽  
Gas Turbines ◽  
Power Plants ◽  
Operating Experience ◽  
Combined Cycle ◽  
Oil Refinery ◽  
Power Train ◽  
And Control ◽  
High Degree ◽  
By Products

In several industrial processes, various hydrocarbons, such as low BTU blast furnace gas, syngas, Naphtha, heavy oil and condensate, are available as by-products or residues. Burning such unconventional fuels for combined cycle power generation can be attractive in certain countries due to their low prices or availability compared to natural gas or distillate. In this paper, design and operating experience of combined cycle power plants burning such unconventional fuels, e.g. Bao Shan in China burning LBTU gas, GVK in India burning Naphtha and Api in Italy burning medium Btu gas from heavy oil (refinery bottom) gasification etc. are discussed. The high degree of manufacturers’ ability to develop such projects and design the required equipment — burners/combustors, CC power train and control systems — is illustrated. In addition, the development of Naphtha and condensate burner for GT13E2 is described in short.

Chemical characterization of feed coals and combustion-by-products from Brazilian power plants

2008 ◽  
Vol 76 (3) ◽  
pp. 227-236 ◽  
Author(s):  
Fernanda S. Depoi ◽  
Dirce Pozebon ◽  
Wolfgang D. Kalkreuth
Keyword(s):  
Power Plants ◽  
Chemical Characterization ◽  
By Products
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