scholarly journals Effect of Harvest Season on the Fuel Properties of Sida hermaphrodita (L.) Rusby Biomass as Solid Biofuel

Energies ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 3398 ◽  
Author(s):  
Nikola Bilandžija ◽  
Tajana Krička ◽  
Ana Matin ◽  
Josip Leto ◽  
Mateja Grubor
Keyword(s):  
Positive Impact ◽  
Raw Materials ◽  
Cell Structure ◽  
Combustion Process ◽  
Electric Energy ◽  
Energy Crops ◽  
Fuel Properties ◽  
Biomass Combustion ◽  
Solid Biofuel ◽  
Combustion Processes

Biomass obtained from cultivated energy crops is one of the raw materials with the highest potential in renewable energy production. Although such biomass can be used in production of lignocellulose bioethanol, it is currently mostly used as solid fuel for generating heat and/or electric energy via combustion processes. Calorific values, proximate and ultimate analysis, cell structure and micro- and macro-elements data are considered as basic parameters in the valorization of fuel properties during biomass combustion processes. Energy crops are cultivated with the aim to produce the largest possible quantity of biomass with minimal agro-technical inputs. One of these crops is Sida hermaphrodita (L.) Rusby. Given the fact that the chemical composition of biomass is influenced by a number of agro-ecological and agro-technical factors, the aim of this work was to determine the fuel properties of Sida hermaphrodita biomass obtained from three different harvest seasons (autumn, winter and spring) and cultivated in the area of the Republic of Croatia. On the basis of these investigations it was possible to conclude that harvest delaying towards spring season had a positive impact on suitability of using biomass of Sida hermaphrodita in the combustion process, which primarily means significant lowering the contents of moisture (18.64%), ash (1.94%), and nitrogen (0.65%), but also means increasing the contents of fixed carbon (6.21%) and lignin (25.45%).

scholarly journals The Influence of Cement Substitution by Biomass Fly Ash on the Polymer–Cement Composites Properties

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3079
Author(s):  
Beata Jaworska ◽  
Dominika Stańczak ◽  
Joanna Tarańska ◽  
Jerzy Jaworski
Keyword(s):  
Fly Ash ◽  
Building Materials ◽  
Raw Materials ◽  
Combustion Process ◽  
Biomass Combustion ◽  
Cement Composites ◽  
Cement Mortars ◽  
Mineral Additive ◽  
Biomass Fly Ash

The generation of energy for the needs of the population is currently a problem. In consideration of that, the biomass combustion process has started to be implemented as a new source of energy. The dynamic increase in the use of biomass for energy generation also resulted in the formation of waste in the form of fly ash. This paper presents an efficient way to manage this troublesome material in the polymer–cement composites (PCC), which have investigated to a lesser extent. The research outlined in this article consists of the characterization of biomass fly ash (BFA) as well as PCC containing this waste. The characteristics of PCC with BFA after 3, 7, 14, and 28 days of curing were analyzed. Our main findings are that biomass fly ash is suitable as a mineral additive in polymer–cement composites. The most interesting result is that the addition of biomass fly ash did not affect the rheological properties of the polymer–cement mortars, but it especially influenced its compressive strength. Most importantly, our findings can help prevent this byproduct from being placed in landfills, prevent the mining of new raw materials, and promote the manufacture of durable building materials.

scholarly journals ANALYSIS OF ASH CONTENT IN COMPOSITE BIOMASS FUELS

2017 ◽  
Vol 3 ◽  
pp. 31
Author(s):  
Edgars Čubars ◽  
Liena Poiša
Keyword(s):  
Raw Materials ◽  
Combustion Process ◽  
Optimal Level ◽  
Ash Content ◽  
Biomass Combustion ◽  
Biomass Fuels ◽  
Fuel Production ◽  
Inorganic Substances ◽  
Composite Fuel ◽  
High Level

The study reveals research of ash content in different composite biomass fuels. It contains analysis of samples obtained from various local Latvian biomass types, i.e. reed, wood, hemp, flax shives and peat, by combining them in different proportions. Ash is a by-product derived from combustion process consisting mostly of inorganic substances that are left after a fuel is burnt. High level of ash content in a fuel is undesirable because it causes problems in automation of biomass combustion process. Previous studies carried out by the author show that average ash content in reeds is 2%, which is a high index comparing with wood where ash content is approximately 0,5-1%. Thus, the high ash content in reeds my cause problems in reed combustion in solid fuel boilers. Besides, it is not possible to ensure permanent reed collection that would ensure continuous reed fuel generating process all year long. In order to reduce the ash content to the optimal level and to diversify raw materials necessary for biomass fuel generating process, the author suggests using composite fuels by combining different biomass types. The study contains optimal combining proportions of different biomass types for composite fuel production basing on the ash content in them.

scholarly journals Reception Ferrotungsten from Wolframite Concentrate by Alumimotermic Method

2011 ◽  
Vol 13 (3-4) ◽  
pp. 205
Author(s):  
N.Yu. Golovchenko ◽  
O.S. Bairakova ◽  
G.I. Ksandopulo ◽  
S.Kh. Aknazarov
Keyword(s):  
Positive Impact ◽  
Raw Materials ◽  
Combustion Process ◽  
Metal Extraction ◽  
High Melting Point ◽  
X Ray ◽  
Smooth Flow ◽  
Master Alloys ◽  
Warm Additives ◽  
Selection Of

For the smelting ferrotungsten of raw materials (mineral) took us to calculate the charge for each experiment. To optimize the process of obtaining ferrotungsten of wolframite carried out the following activities: to reduce speed and combustion temperature. A change batch positive impact on the development of the combustion process. Experimental results have shown the effectiveness of the introduction of aluminium additives in excess of stoichiometry because the explosive burning regime turned into stationary. In this work the charge calculated on 300 g volframite concentrate so that as a result of the aluminotermic reaction in the alloy contained 70% of tungsten. Calculations of charge showed that in the case of the smelting of ferro-alloys and master alloys used in this work and have a high melting point (ferrotungsten, ferromolybdenum, etc.) – temperature process of melting alloy is indispensable for the success of melting. To reduce the speed of combustion and the temperature were conducted experiments on selection of ballast additives which allows you to bring the process to a smooth flow of the reaction. As ballast additives used aluminium oxide. It was found that an increase of more than 20 additives reducing the release of the alloy and metal extraction. Also included experiments on selection of warm additives. Use as a warm additive of ammonium nitrate is not desirable because of the rapid reaction and loss of metal slag. The output and the extraction of metal in the application of potassium and sodium nitrate are the same but in the case of kalievoj nitrate slag can be used as a prolonged potash fertilizer. From the x-ray spectrometer alloys were analyzed.

scholarly journals A study on the biomass wastes' combustion process and their biochar

2020 ◽  
Author(s):  
Chaimaa Hadey ◽  
Allouch Malika ◽  
Alami Mohammed ◽  
Boukhlifi Fatima
Keyword(s):  
Thermal Decomposition ◽  
Coal Combustion ◽  
Combustion Process ◽  
Biomass Combustion ◽  
Coal Oxidation ◽  
Char Formation ◽  
Solid Biofuel ◽  
Oxidation Stage ◽  
Three Stages ◽  
Oxidative Atmosphere

Abstract Peanut shells (PS) and sugar canes (SC) constitute an attractive and an energetic biomass source in Morocco since they are renewable, abundant and available. this work seeks to study the thermal decomposition of these biomass samples and their derived solid biofuel under oxidative atmosphere, and it also attempts to determine their kinetic and thermodynamic combustion parameters . The solid biofuel samples were produced by slow pyrolysis at a temperature of 400°C. Based on the TGA results, the biomass combustion process goes through three stages which are the evaporation of moisture, devolatilization and char formation. For the biochar, it takes two steps that corresponds to the evacuation of water and to the coal combustion. Kinetic parameters of each step are evaluated using Coats-Redfern method, and the thermodynamic parameters are calculated. The results have shown that biochar is less reactive than its original biomass, and that the biomass samples are the most reactive ones in the coal oxidation stage. We have also found that the biomass samples present a different combustion process. These results are useful for the configuration and the design of feasible systems for the conversion of this biomass into energy.

scholarly journals Torrefaction of oat straw to use as solid biofuel, an additive to organic fertilizers for agriculture purposes and activated carbon – TGA analysis, kinetics

2020 ◽  
Vol 154 ◽  
pp. 02004 ◽  
Author(s):  
Szymon Szufa ◽  
Maciej Dzikuć ◽  
Łukasz Adrian ◽  
Piotr Piersa ◽  
Zdzisława Romanowska-Duda ◽  
...  
Keyword(s):  
Residence Time ◽  
New Technologies ◽  
Negative Impact ◽  
Renewable Energy Sources ◽  
Combustion Process ◽  
Experimental Studies ◽  
Biomass Energy ◽  
Organic Fertilizers ◽  
Biomass Combustion ◽  
Solid Biofuel

In this paper authors present research results which are the optimum parameters of the torrefaction process using straw from oats and maize. The most important parameters for the torrefaction process are temperature and residence time. Both parameters are essential to designing and construction of industrial biomass torrefaction installations. Energy crops and waste coming from agricultural production have the most promising perspective from all kind of renewable energy sources in Poland. Currently, intensive studies on the process of biomass torrefaction are being carried out. In this experimental investigation, authors examined the torrefaction process of two types of agriculture biomass, such as: oats, maize. The main overarching objective of the experimental studies described below is the development of various biochar as an additive to agricultural fertilizers resulting from the conversion of biomass from agriculture residues – straw from oats and maize. The last of enumerated biomasses is treated through different conversion processes such as: drying, torrefaction to homogenize their physical and chemical properties. Among many of its areas, it is extremely important to optimize the production of biomass energy plants and its refinement (in the torrefaction process), which will improve the balance and profitability of energy production from RES, and reduce the logistics and storage costs of this fuel and improve the efficiency of biomass combustion process. When implementing new technologies indicated in this work and optimizing the harvesting of plant biomass, the negative impact on the environment caused by stored municipal waste can be reduced. This biomass torrefaction process temperature and residence time were necessary for the design and construction of semi-pilot scale biomass torrefaction installations with dryer and torrefaction reactor to perform a continuous biomass torrefaction process using superheated steam

scholarly journals Solid Biofuel Production Perspectives in Ukraine

2019 ◽  
pp. 70-78
Author(s):  
М. V. Panchuk ◽  
І. М. Semianyk ◽  
I. O, Mandryk
Keyword(s):  
High Efficiency ◽  
Raw Materials ◽  
Energy Crops ◽  
Raw Material ◽  
Biofuel Production ◽  
High Concentration ◽  
Potential Yield ◽  
Granulation Process ◽  
Solid Biofuel ◽  
Equivalent Fuel

The reserves of fossil fuel resources in Ukraine are limited, that is why the usage of solid biofuel from renewable raw materials is one of the most important factors of state energy policy directed at the preservation of traditional fuel and energy resources and improvement of the environment condition. The analysis of biological resources is made in this paper, and it is determined that Ukraine has a sufficient potential which is available for energy production and constitutes around 29 million tons of equivalent fuel. Energy crops are an important resource therewith. A potential yield of solid biofuel from perennial energy crops can constitute approximately 35.8 million tons per year. It is shown that raw biomass has a number of disadvantages: low energy density, unstable granulometry, wide spread of moisture content, and low bulk density which are the main problems for its storage and transportation. In order to increase consumer performance properties of biomass, the granulation process is suggested to be used. The implementation of granulation process will allow to eliminate the shortcomings of biological raw material and to transform it into a high-efficiency fuel.  One of the most important conditions of effective and profitable functioning of granulated biomass production is the availability and regular supply of raw materials. Therewith, for Ukraine's conditions it is worthwhile to use sets of high-power equipment for its operation both in the places with high concentration of raw materials and small mobile units which can work in stationary conditions and move to the places with sufficient amount of raw materials decreasing the costs of biomass transportation to minimum. At the same time, there is a need in developing new homeland elaborations, both complex process lines and individual equipment units for different capacities.   The paper determines the main directions of using granulation products among which are: combustion in pellet boilers, common combustion with coal, and gasification of granulated biomass for obtaining motor oils. It is mentioned that the application of granulation technologies solves not only the energy problems but also a set of other problems: ecological, agricultural, forestry and social ones.

EXPERIMENTAL STUDIES ON THE CORROSION OCCURRENCE DURING BIOMASS COMBUSTION PROCESS

2012 ◽  
Vol 11 (9) ◽  
pp. 1555-1560 ◽  
Author(s):  
Ionel Pisa ◽  
Gheorghe Lazaroiu ◽  
Corina Radulescu ◽  
Lucian Mihaescu
Keyword(s):  
Combustion Process ◽  
Experimental Studies ◽  
Biomass Combustion

scholarly journals Effects of Catalysts on Emissions of Pollutants from Combustion Processes of Liquid Fuels

2014 ◽  
Vol 13 (2) ◽  
pp. 5-17
Author(s):  
Agnieszka Bok ◽  
Joanna Guziałowska-Tic ◽  
Wilhelm Jan Tic
Keyword(s):  
Combustion Process ◽  
Combustion Products ◽  
Organometallic Complexes ◽  
Liquid Fuels ◽  
Motor Fuels ◽  
Harmful Emissions ◽  
Fuel Oils ◽  
Sulphur Oxides ◽  
Dynamic Growth ◽  
Combustion Processes

Abstract The dynamic growth of the use of non-renewable fuels for energy purposes results in demand for catalysts to improve their combustion process. The paper describes catalysts used mainly in the processes of combustion of motor fuels and fuel oils. These catalysts make it possible to raise the efficiency of oxidation processes simultanously reducing the emission of pollutants. The key to success is the selection of catalyst compounds that will reduce harmful emissions of combustion products into the atmosphere. Catalysts are introduced into the combustion zone in form of solutions miscible with fuel or with air supplied to the combustion process. The following compounds soluble in fuel are inclused in the composition of the described catalysts: organometallic complexes, manganese compounds, salts originated from organic acids, ferrocen and its derivatives and sodium chloride and magnesium chloride responsible for burning the soot (chlorides). The priority is to minimize emissions of volatile organic compounds, nitrogen oxides, sulphur oxides, and carbon monoxide, as well as particulate matter.

Analyzing taxpayer support for the Krasnodar Krai's agricultural sector

2021 ◽  
Vol 19 (8) ◽  
pp. 1457-1476
Author(s):  
Valentina L. ZAZIMKO ◽  
Nadezhda V. SEDYKH
Keyword(s):  
Regression Analysis ◽  
Agricultural Sector ◽  
Positive Impact ◽  
Raw Materials ◽  
Agricultural Products ◽  
Agricultural Producers ◽  
Krasnodar Krai ◽  
Correlation And Regression Analysis ◽  
Budget Support ◽  
The Government

Subject. This article analyzes the implementation of the government programme of the Krasnodar Krai, Development of Agriculture and Regulation of Markets for Agricultural Products, Raw Materials and Food. Objectives. The article aims to assess the measures of budget support for the agricultural sector of the Krasnodar Krai. Methods. For the study, we used a correlation and regression analysis of official statistics. Results. The article finds that the government programme of the Krasnodar Krai, Development of Agriculture and Regulation of Markets for Agricultural Products, Raw Materials and Food has a positive impact on the progress of production in the agriculture of the region, but it does not contribute to the growth of investment in the industry. Conclusions. It is necessary to move from targeted support for individual agricultural producers to the creation of a modern sectoral infrastructure.

The Effect of Dolomite Addictive Ratio on Torrified Cassava Rhizome in the Biomass Combustion Process

2021 ◽  
Vol 407 ◽  
pp. 113-120
Author(s):  
Nat Thuchayapong ◽  
Nattawut Tharawadee
Keyword(s):  
Combustion Process ◽  
Fixed Bed ◽  
Air Pressure ◽  
Biomass Combustion ◽  
Optimum Ratio ◽  
Bomb Calorimeter ◽  
Useful Heat ◽  
Main Component ◽  
The Cost ◽  
Research Studies

This research studies on the effect of additive (Dolomite) on Biomass powder (Cassava rhizome) which passes Torrefied process and fixed bed at 250 degrees Celsius for one hour and a half. The gasifier with up-draft type was used in this experiment. Air pressure was fixed at 0.1 Bar. The useful heat (Quseful) and Low heating valves (LHV) was investigated by using an Automatic Bomb Calorimeter. Moreover, the dolomite was varied 0, 10 and 15% by weight mixed with Cassava rhizome achieved with Torrefied process. When Low heating valves (LHV) slightly decreases from 21.96±0.22 MJ/kg to 18.15±0.50 MJ/kg, Quseful heat from the burning from gasifier sharply increase when it is mixed with dolomite from 753.34±39.18 to 1,003.97±33.49KJ respectively. The loading of dolomite has significance affecting the useful heat. The present study reveals that low heating valves (LHV) decreases and Quseful heat increase result from dolomite which gives a clean gas product and the Tar molecule can be easily broken. The CO2 gas from the combustion process was absorbed by CaO, which is the main component in dolomite. The cost of mixing 8.9% of Dolomite with Cassava rhizome is the optimum ratio for the biomass combustion process.

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