The Experts below are selected from a list of 150 Experts worldwide ranked by ideXlab platform

Pavel A. Strizhak - One of the best experts on this subject based on the ideXlab platform.

  • Combustion and emission behavior of different waste Fuel blends in a laboratory furnace
    Fuel, 2021
    Co-Authors: Ksenia Vershinina, Pavel A. Strizhak, Vadim Dorokhov, D. S. Romanov
    Abstract:

    Abstract The paper discusses the results of lab-scale combustion of complex Waste-Derived Fuel mixtures in different forms. Composite Fuels based on a combination of widespread industrial and municipal waste were considered. The scientific and practical novelty of this study comes from the fact that for the first time, a group of integral parameters was researched. They describe the ignition and combustion of mixtures in different forms: pressed dry Fuel (pellets), a wet slurry, and granules of different moisture content. The most efficient method in terms of increasing the rate and reducing the temperature threshold of the oxidation reaction is firing a low-moisture mixture based on municipal solid waste (with a predominance of wood components). Pelleted coal sludge combustion was characterized by a rather long delay in heterogeneous ignition and underburning. It was shown that in order to reduce emissions and increase the degree of burnout, coal processing waste should be burned as wet granules or slurry droplets.

  • Comparing the ignition parameters of promising coal Fuels
    Process Safety and Environmental Protection, 2020
    Co-Authors: Kseniya Yurievna Vershinina, Vadim Dorokhov, D. S. Romanov, Pavel A. Strizhak
    Abstract:

    Abstract Here we compare the ignition and burnout parameters of lignite, bituminous coal, and anthracite particles, as well as slurry droplets. We also study the fire hazard of traditional fossil Fuels and promising Fuel types (coal-water slurry, coal processing waste, and Waste-Derived slurry). The micro-explosion of multi-component droplets is considered in terms of safety at an energy enterprise, i.e., under the actual furnace conditions. Dimensionless integral fire hazard indexes of Fuels are calculated and compared with those of lignite as the most reactive Fuel. Coal processing wastes are found to be the safest. The relative fire hazard indexes of bituminous coal particles and coal-water slurry are comparable. Adding used turbine oil to the Waste-Derived Fuel mixture makes it more fire-hazardous. Finally, we explore the micro-explosive dispersion of Waste-Derived slurry droplets before and during combustion in terms of the risk of their spontaneous ignition.

  • effective incineration of Fuel waste slurries from several related industries
    Environmental Research, 2019
    Co-Authors: G.s. Nyashina, N.e. Shlegel, Ksenia Yu Vershinina, Pavel A. Strizhak
    Abstract:

    This study is based on the analysis of a set of industrial sectors (coal processing, wood processing, transport, oil, and water treatment) in order to identify the amount and type of combustible waste suitable for incineration. The main ignition and combustion parameters of these wastes have been experimentally obtained from their direct individual incineration in the original form and as part of a slurry based on wastewater. It has been established that a set of parameters allow Waste-Derived Fuel mixtures to compete with coal dust and Fuel oil with an environmental advantage. In particular, the concentration of sulfur and nitrogen oxides in the combustion products of all the tested slurries is 1.5-3 times as low as that of coal dust. Most of the wastes in question do not provide such advantages when burnt individually. We have assessed the fire safety of Fuel mixtures and analyzed the prospects of mass waste incineration technologies. The calculations show that about 14-20% of coal and oil can be saved annually by extensively involving industrial waste in the energy sector. The experimental results obtained are the basis for the development of useful technologies for the safe and efficient combustion of waste from different industries.

  • Combustion of the Waste-Derived Fuel compositions metallized by aluminium powder
    Combustion and Flame, 2017
    Co-Authors: T. R. Valiullin, Roman I. Egorov, Pavel A. Strizhak
    Abstract:

    Abstract Usage of the Waste-Derived Fuels is a very promising way for different industrial processes. It can yield both environmental and economic benefits, but for the heat production to be effective, Fuel compositions must be prepared in an intelligent way. The combustion heat of such Fuels is lower than that of conventional ones, so their improvement and successful application is in our best interests. Our goal was to investigate experimentally the effect of adding a small amount of aluminium powder (particle size ∼ 10 µm) to optimize Waste-Derived coal-water slurry with waste petrochemicals. We show the optimal metal concentration rate (3 wt%) that provides a significant increase in the maximum combustion temperature (by more than 100°), while keeping the ignition delay time at the appropriate level. Moreover, another mode is possible, when the combustion temperature is almost independent of the temperature inside the combustion chamber. The combustion duration and underburning levels were observed, too.

  • The light-induced gasification of Waste-Derived Fuel
    Fuel, 2017
    Co-Authors: Roman I. Egorov, Pavel A. Strizhak
    Abstract:

    Abstract We have realized the effective approach of light-induced gasification of the Waste-Derived Fuel. The coal-water slurry doped by waste petrochemicals was converted into the syngas by laser pulses (40 mJ and 10 ns). The simple experiment shows more than 30% conversion efficiency as well as an evident generation of CO and H 2 . Together with this, the absence of CO 2 inside the conversion products and fire-free “cold” processing of the initial Fuel allow us making conclusion about good practical potential of the proposed way for industrial conversion of the wastes into the syngas. In contrary to catalytic techniques, the light-induced conversion does not need rare-Earth metals and other expensive components.

John Nicholls - One of the best experts on this subject based on the ideXlab platform.

  • Hot corrosion tests on corrosion resistant coatings developed for gas turbines burning biomass and waste derived Fuel gases
    Surface and Coatings Technology, 2013
    Co-Authors: A. Bradshaw, Nigel J. Simms, John Nicholls
    Abstract:

    Abstract This paper reports on results of hot corrosion tests carried out on silicon–aluminide coatings developed for hot components of gas turbines burning biomass and waste derived Fuel gases. The corrosion tests of the silicon–aluminide coatings, applied to superalloys IN738LC and CMSX-4, each consisted of five 100 h periods; at 700 °C for the type II tests and at 900 °C for the type I tests. Deposits of Cd + alkali and Pb + alkali were applied before each exposure. These deposits had been previously identified as being trace species produced from gasification of biomass containing Fuels which after combustion had the potential to initiate hot corrosion in a gas turbine. Additionally, gases were supplied to the furnace to simulate the atmosphere anticipated post-combustion of these biomass derived Fuel gases. Results of the type I hot corrosion tests showed that these novel coatings remained in the incubation stage for at least 300 h, after which some of the coating entered propagation. Mass change results for the first 100 h confirmed this early incubation stage. For the type II hot corrosion tests, differences occurred in oxidation and sulphidation rates between the two substrates; the incubation stages for CMSX-4 samples continued for all but the Cd + alkali high salt flux samples, whereas, for IN738LC, all samples exhibited consistent incubation rates. Following both the type I and type II corrosion tests, assessments using BSE/EDX results and XRD analysis confirmed that there has to be remnant coating, sufficient to grow a protective scale. In this study, the novel silicon–aluminide coating development was based on coating technology originally evolved for gas turbines burning natural gas and fossil Fuel oils. So in this paper comparisons of performance have been made with three commercially available coatings; a CoCrAlY overlay, a platinum-aluminide diffusion, and triple layer nickel–aluminide/silicon–aluminide-diffusion coatings. These comparisons showed that the novel single-step silicon–aluminide coatings provide equal or superior type II hot corrosion resistance to the best of the commercial coatings.

  • Development of hot corrosion resistant coatings for gas turbines burning biomass and waste derived Fuel gases
    Surface and Coatings Technology, 2013
    Co-Authors: A. Bradshaw, Nigel J. Simms, John Nicholls
    Abstract:

    Abstract Carbon dioxide emission reductions are being sought worldwide to mitigate climate change. These need to proceed in parallel with optimisation of thermal efficiency in energy conversion systems on economic grounds to achieve overall sustainability. The use of renewable energy is one strategy being adopted to achieve these needs; with one route being the burning of biomass and waste derived Fuels in the gas turbines of highly efficient, integrated gasification combined cycle (IGCC) electricity generating units. A major factor to be taken into account with gas turbines using such Fuels, compared with natural gas, is the potentially higher rates of hot corrosion caused by molten trace species which can be deposited on hot gas path components. This paper describes the development of hot corrosion protective coatings for such applications. Diffusion coatings were the basis for coating development, which consisted of chemical vapour deposition (CVD) trials, using aluminising and single step silicon-aluminising processes to develop new coating structures on two nickel-based superalloys, one conventionally cast and one single crystal (IN738LC and CMSX-4). These coatings were characterised using SEM/EDX analysis and their performance evaluated in oxidation and hot corrosion screening tests. A variant of the single step silicon-aluminide coating was identified as having sufficient oxidation/hot corrosion resistance and microstructural stability to form the basis for future coating optimisation.

Fang-chih Chang - One of the best experts on this subject based on the ideXlab platform.

  • Agricultural waste derived Fuel from oil meal and waste cooking oil
    Environmental Science and Pollution Research, 2018
    Co-Authors: Fang-chih Chang, Ming-jer Tsai
    Abstract:

    Oil meal is a by-product of the oil industry (peanut meal, sesame meal, and camellia meal). Oil is extracted from seeds, and the leftover meal is then pelletized, and this process generates a large amount of waste oil meal in Taiwan. In this study, peanut meal, sesame meal, and camellia meal derived Fuels were prepared from the waste oil meal with waste cooking oil. The combustion behaviors of the oil meal derived Fuels were also investigated. The characteristics of the derived Fuel made from oil meal with waste cooking oil showed that the ash content is less than 10% and its calorific value reached 5000 kcal/kg. Additionally, the activation energy of the oil meal and waste cooking oil was analyzed by the Kissinger method. The results show that the Fuel prepared in this work from the oil meal mixed with waste cooking oil is suitable for use as an alternative Fuel and also avoids food safety issues.

  • Forest Waste Derived Fuel with Waste Cooking Oil
    Energy Procedia, 2017
    Co-Authors: Ming-jer Tsai, Fang-chih Chang
    Abstract:

    Abstract Accompanying with the rapidly increasing scarcity of the Earth's limited resources, the recycling-based society is an imperative objective of sustainable development and is also the future worldwide trend. Forestry waste can be regarded as important environmental resources. The potential applications of forestry waste resources in green energy included the biomass-derived Fuel, bio-ethanol, and bio-diesel. Forest waste is the by-product of the wood utilization industry in Taiwan. In this study, the forest waste derived Fuels were prepared with the waste cooking oil. The combustion behaviors of the forest waste derived Fuels were also investigated. The characteristics of the derived Fuel made from forest waste with 20% waste cooking oil showed that the ash content is less than 10% and its calorific value reached 5,000 kcal/kg. The results show that the Fuel prepared in this work from the forest waste mixed with waste cooking oil is suitable for use as an alternative Fuel and also reduces the global greenhouse gas emissions.

Ming-jer Tsai - One of the best experts on this subject based on the ideXlab platform.

  • Agricultural waste derived Fuel from oil meal and waste cooking oil
    Environmental Science and Pollution Research, 2018
    Co-Authors: Fang-chih Chang, Ming-jer Tsai
    Abstract:

    Oil meal is a by-product of the oil industry (peanut meal, sesame meal, and camellia meal). Oil is extracted from seeds, and the leftover meal is then pelletized, and this process generates a large amount of waste oil meal in Taiwan. In this study, peanut meal, sesame meal, and camellia meal derived Fuels were prepared from the waste oil meal with waste cooking oil. The combustion behaviors of the oil meal derived Fuels were also investigated. The characteristics of the derived Fuel made from oil meal with waste cooking oil showed that the ash content is less than 10% and its calorific value reached 5000 kcal/kg. Additionally, the activation energy of the oil meal and waste cooking oil was analyzed by the Kissinger method. The results show that the Fuel prepared in this work from the oil meal mixed with waste cooking oil is suitable for use as an alternative Fuel and also avoids food safety issues.

  • Forest Waste Derived Fuel with Waste Cooking Oil
    Energy Procedia, 2017
    Co-Authors: Ming-jer Tsai, Fang-chih Chang
    Abstract:

    Abstract Accompanying with the rapidly increasing scarcity of the Earth's limited resources, the recycling-based society is an imperative objective of sustainable development and is also the future worldwide trend. Forestry waste can be regarded as important environmental resources. The potential applications of forestry waste resources in green energy included the biomass-derived Fuel, bio-ethanol, and bio-diesel. Forest waste is the by-product of the wood utilization industry in Taiwan. In this study, the forest waste derived Fuels were prepared with the waste cooking oil. The combustion behaviors of the forest waste derived Fuels were also investigated. The characteristics of the derived Fuel made from forest waste with 20% waste cooking oil showed that the ash content is less than 10% and its calorific value reached 5,000 kcal/kg. The results show that the Fuel prepared in this work from the forest waste mixed with waste cooking oil is suitable for use as an alternative Fuel and also reduces the global greenhouse gas emissions.

Dimitrios Komilis - One of the best experts on this subject based on the ideXlab platform.