scholarly journals Emission estimates and air quality impacts from the use of alternative fuels by the Titan cement factory in Thessaloniki

2013 ◽  
Vol 14 (2) ◽  
pp. 218-224
Keyword(s):  
Alternative Fuels ◽  
Fossil Fuels ◽  
Alternative Fuel ◽  
Cement Industry ◽  
Partial Replacement ◽  
Limit Values ◽  
Cement Factory ◽  
Pollution Levels ◽  
Fuel Substitution ◽  
The Impact

Cement production is an energy-intensive process. Utilisation of fossil fuels is common practice in the cement industry around the world. Alternative fuel substitution rates increase every year. More specifically, 18 % of the fuel used by the European cement industry in 2006 consists of alternative fuels. This study aims to investigate the prospects for the partial replacement of conventional fossil fuels currently used in the TITAN cement factory in Thessaloniki, Greece, with alternative fuels, focusing on the impact of alternative fuel use on the emissions of air pollutants from co-incineration operations. Air emissions were estimated for both the conventional fuel and mixtures of conventional fuel with alternative fuels, based on emission factors found in the literature but also using the measurements conducted by TITAN in 2010. Emission estimates indicate that legislative limit values for all pollutants are not exceeded. Based on the emission estimates and measurements in the flue gas, the dispersion of the plume around the factory has been described with an appropriate numerical simulation model. Results suggest that the factory’s contribution to the air pollution levels in the surrounding area is very low for most regulated pollutants.

scholarly journals The Use of Biodrying to Prevent Self-Heating of Alternative Fuel

Materials ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 3039 ◽  
Author(s):  
Teresa Gajewska ◽  
Mateusz Malinowski ◽  
Maciej Szkoda
Keyword(s):  
Alternative Fuels ◽  
Fossil Fuels ◽  
Calorific Value ◽  
Alternative Fuel ◽  
The Self ◽  
Process Efficiency ◽  
Self Heating ◽  
Maximum Temperatures ◽  
Refuse Derived Fuels ◽  
The Impact

Alternative fuels (refuse-derived fuels—RDF) have been a substitute for fossil fuels in cement production for many years. RDF are produced from various materials characterized by high calorific value. Due to the possibility of self-ignition in the pile of stored alternative fuel, treatments are carried out to help protect entrepreneurs against material losses and employees against loss of health or life. The objective of the research was to assess the impact of alternative fuel biodrying on the ability to self-heat this material. Three variants of materials (alternative fuel produced on the basis of mixed municipal solid waste (MSW) and on the basis of bulky waste (mainly varnished wood and textiles) and residues from selective collection waste (mainly plastics and tires) were adopted for the analysis. The novelty of the proposed solution consists in processing the analyzed materials inside the innovative ecological waste apparatus bioreactor (EWA), which results in increased process efficiency and shortening its duration. The passive thermography technique was used to assess the impact of alternative fuel biodrying on the decrease in the self-heating ability of RDF. As a result of the conducted analyses, it was clear that the biodrying process inhibited the self-heating of alternative fuel. The temperature of the stored fuel reached over 60 °C before the biodrying process. However, after the biodrying process, the maximum temperatures in each of the variants were about 30 °C, which indicates a decrease in the activity of microorganisms and the lack of self-ignition risk. The maximum temperatures obtained (>71 °C), the time to reach them (≈4 h), and the duration of the thermophilic phase (≈65 h) are much shorter than in the studies of other authors, where the duration of the thermophilic phase was over 80 h.

scholarly journals Ethanol/Gasoline Blends as Alternative Fuel in Last Generation Spark-Ignition Engines: A Review on CO and HC Engine Out Emissions

Energies ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 4034
Author(s):  
Paolo Iodice ◽  
Massimo Cardone
Keyword(s):  
Physicochemical Properties ◽  
Alternative Fuels ◽  
Experimental Studies ◽  
Alternative Fuel ◽  
Exhaust Emissions ◽  
Spark Ignition ◽  
Operating Conditions ◽  
Spark Ignition Engine ◽  
Spark Ignition Engines ◽  
The Impact

Among the alternative fuels existing for spark-ignition engines, ethanol is considered worldwide as an important renewable fuel when mixed with pure gasoline because of its favorable physicochemical properties. An in-depth and updated investigation on the issue of CO and HC engine out emissions related to use of ethanol/gasoline fuels in spark-ignition engines is therefore necessary. Starting from our experimental studies on engine out emissions of a last generation spark-ignition engine fueled with ethanol/gasoline fuels, the aim of this new investigation is to offer a complete literature review on the present state of ethanol combustion in last generation spark-ignition engines under real working conditions to clarify the possible change in CO and HC emissions. In the first section of this paper, a comparison between physicochemical properties of ethanol and gasoline is examined to assess the practicability of using ethanol as an alternative fuel for spark-ignition engines and to investigate the effect on engine out emissions and combustion efficiency. In the next section, this article focuses on the impact of ethanol/gasoline fuels on CO and HC formation. Many studies related to combustion characteristics and exhaust emissions in spark-ignition engines fueled with ethanol/gasoline fuels are thus discussed in detail. Most of these experimental investigations conclude that the addition of ethanol with gasoline fuel mixtures can really decrease the CO and HC exhaust emissions of last generation spark-ignition engines in several operating conditions.

A comparative study of the effect of compression ratio on the efficiency and flame development angle in a Cooperative Fuel Research engine fueled with binary gasoline–alcohol blends

2019 ◽  
pp. 146808741985910 ◽  
Author(s):  
Guillermo Rubio-Gómez ◽  
Lis Corral-Gómez ◽  
David Rodriguez-Rosa ◽  
Fausto A Sánchez-Cruz ◽  
Simón Martínez-Martínez
Keyword(s):  
Comparative Study ◽  
Compression Ratio ◽  
Alternative Fuels ◽  
Internal Combustion Engines ◽  
Fossil Fuels ◽  
Combustion Process ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Flame Development ◽  
The Impact

In the last few years, increasing concern about the harmful effects of the use of fossil fuels in internal combustion engines has been observed. In addition, the limited availability of crude oil has driven the interest in alternative fuels, especially biofuels. In the context of spark ignition engines, bioalcohols are of great interest owing to their similarities and blend capacities with gasoline. Methanol and ethanol have been widely used, mainly due to their knocking resistance. Another alcohol of great interest is butanol, thanks to its potential of being produced as biofuel and its heat value closer to gasoline. In this study, a comparative study of gasoline–alcohol blend combustion, with up to 20% volume, with neat gasoline has been carried out. A single-cylinder, variable compression ratio, Cooperative Fuel Research-type spark ignition engine has been employed. The comparison is made in terms of fuel conversion efficiency and flame development angle. Relevant information related to the impact in the combustion process of the use of the three main alcohols used in blends with gasoline has been obtained.

Performance and emission characteristics of turbocharged diesel engine fueled with palm biodiesel blends

2018 ◽  
Vol 7 (3) ◽  
pp. 1040
Author(s):  
Byungmo Yang ◽  
M A. Kalam ◽  
Haengmuk Cho
Keyword(s):  
Alternative Fuels ◽  
Fossil Fuels ◽  
Engine Performance ◽  
Alternative Fuel ◽  
Performance And Emission ◽  
Crude Oil Prices ◽  
Gas Measurement ◽  
Consumption Rates ◽  
Hc Emissions ◽  
Main Component

The exhaustion of fossil fuels and sharp rise in crude oil prices has led to the development of various alternative fuels. Alternative fuels are a necessity to meet rising energy consumption rates and to ensure eco-friendly growth. Alternative fuels that can be regenerated, are sustainable and have clean burning capacity to help promote an eco-friendly development. Whereas there have been various ideas and technologies relating to biodiesel as an alternative fuel, these tend to be restricted to the distant future insofar as compression-ignition engines are concerned. Biodiesel, produced by reacting triglycerides which are the main component of animal or plant-based fatty acids with methanol, is known to be an eco-friendly alternative fuel that can take the place of conventional petroleum diesel. In the present study, biodiesel (palm oil) was mixed at a certain ratio with commercially sold diesel, then introduced into a TCDI engine which was run at low load conditions for engine performance and exhaust gas measurement. Both engine output and torque were reduced, and fuel consumption increased to make up for the reduction in output. There were slight reductions in NOx and CO2 emissions, but changes in CO and HC emissions were negligible.  

scholarly journals Multiple Impinging Jet Air-Assisted Atomization

2017 ◽  
Author(s):  
Mário Costa ◽  
Bruno Pizziol ◽  
Miguel Panao ◽  
André Silva
Keyword(s):  
Mass Flow Rate ◽  
Mass Flow ◽  
Flow Rate ◽  
Alternative Fuels ◽  
Fossil Fuels ◽  
Cross Flow ◽  
Liquid Sheet ◽  
Air Mass ◽  
Breakup Mechanism ◽  
The Impact

The growth of the aviation sector triggered the search for alternative fuels and continued improvements in thecombustion process. This work addresses the technological challenges associated with spray systems and theconcern of mixing biofuels with fossil fuels to produce alternative and more ecological fuels for aviation. This workproposes a new injector design based on sprays produced from the simultaneous impact of multiple jets, using anadditional jet of air to assist the atomization process. The results evidence the ability to control the average dropsize through the air-mass flow rate. Depending on the air-mass flow rate there is a transition between atomizationby hydrodynamic breakup of the liquid sheet formed on the impact point, to an aerodynamic breakup mechanism,as found in the atomization of inclined jets under cross-flow conditions. The aerodynamic shear breakupdeteriorates the atomization performance, but within the same order of magnitude. Finally, our experiments showthat mixing a biofuel with a fossil fuel does not significantly alter the spray characteristics, regarded as a stepfurther in developing alternative and more ecological fuels for aero-engines.DOI: http://dx.doi.org/10.4995/ILASS2017.2017.4737

scholarly journals Use of hydrogen as a source of clean energy

2021 ◽  
Vol 239 ◽  
pp. 00013
Author(s):  
Danut Grecea ◽  
Gabriela Pupazan ◽  
Marius Darie ◽  
Mihaela Paraian ◽  
Cosmin Colda
Keyword(s):  
Alternative Fuels ◽  
Fossil Fuels ◽  
Necessary Conditions ◽  
Clean Energy ◽  
Hydrogen Gas ◽  
Human Society ◽  
Legal Requirements ◽  
Pollution Levels ◽  
Gas Stations ◽  
Car Transportation

The increase in energy consumption is closely correlated with the continuous evolution of human society, which implies both the depletion of fossil fuels and the increase in pollution levels. One solution to these problems is to obtain electricity from renewable sources but also to use alternative fuels for car transportation. Within the paper, there are presented the necessary conditions for the design of hydrogen gas stations in accordance with the legal requirements in force regarding the protection to explosion.

scholarly journals ECONOMICS AND RISK MANAGEMENT OF BIOFUEL PRODUCTION IN AGRICULTURE

2021 ◽  
Vol 2 (37) ◽  
pp. 271-279
Author(s):  
I. Perevozova ◽  
Iu. Samoilyk ◽  
О. Radchenko ◽  
N. Shportiuk ◽  
M. Demydova
Keyword(s):  
Risk Management ◽  
Alternative Fuels ◽  
Production Management ◽  
Jel Classification ◽  
Climatic Conditions ◽  
Biofuel Production ◽  
Limit Values ◽  
Agricultural Enterprises ◽  
The Cost ◽  
The Impact

Abstract. The development of the biofuel market in the world has a positive dynamic for growth. The substantiation of the directions of further improvement of the methodology of production management of alternative fuels is taking into account the policy of climate change and the possibility of reducing dependence on external suppliers of traditional fuels. Ukraine has favorable natural and climatic conditions for the development of production of non-traditional fuels. The most common crops that can be grown in Ukraine for biofuels are rapeseed and corn. Based on the material and technical base and production conditions, rapeseed is the best crop for cultivation. Therefore, the object that we have chosen for this study is the production of biodiesel, which does not require significant capital expenditures by agricultural enterprises. For the purposes of the study, the risks were grouped according to various classification criteria (operational and production; marketing; financial; legal and infrastructural; weather; environmental) and the weights of their impact on the performance of agricultural enterprises. The structural scheme of the algorithm of the automated estimation of influence of risk factors for development of bases of the analysis and management of risks of production of biodiesel is constructed. The author's method of calculating the impact of the risk complex takes into account the limit values of the intervals of fuzzy quantities. To preserve soil fertility and reduce the corresponding risks, the proportion of rapeseed in growing areas should be at the limit of 17—18% (when also growing sunflower the upper limit is 12%), then all three analyzed farms can not only use their own land for rapeseed crops, but also, if necessary, rent the necessary plot, or, according to the results of the relevant analysis, its part. In some cases, farms even purchase some of the seeds needed to load the equipment. The results of calculations of the cost of production of biofuels showed that the increase in the cost for small and medium producers is not significant compared to large producers. Keywords: biofuels, biodiesel, risk management, agricultural enterprises, risk management, efficiency. JEL Classification O13, Q42 Formulas: 6; fig.: 1; tabl.: 5; bibl.: 19.

scholarly journals The Study Influences the Jatropha-Diesel Mixing Ratio to the Formation of Soot Emissions in Diesel Exhaust Gases

2019 ◽  
Vol 4 (8) ◽  
pp. 80-84
Author(s):  
Van Quy Nguyen ◽  
Huu Cuong Le
Keyword(s):  
Alternative Fuels ◽  
Internal Combustion Engines ◽  
Fossil Fuels ◽  
Environmentally Friendly ◽  
Fuel Mixture ◽  
Internal Combustion ◽  
Combustion Engines ◽  
Mixing Ratio ◽  
Pollution Levels ◽  
Jatropha Seeds

To cope with the depletion of fossil fuels and the threat of exhaust pollution from internal combustion engines, research finds alternative fuels. Step by step to completely replace fossil fuels that will be exhausted in the future and environmentally friendly due to internal combustion engines is an urgent and important issue. Diversify fuel sources used for internal combustion engines and environmentally friendly when using Jatropha - Diesel fuel mixture. The paper focuses on studying the ability to use biodiesel derived from Jatropha seeds with the volume ratios of 5%, 10% and 15% on experimental engines. Thereby, it will analyze and evaluate the technical features and pollution levels of engines compared to pure fuels. Experimental study assessing the effect of Jatropha - Diesel mixing ratio on the emission formation compared with emissions in Vikyno EV2600 engines.

The feasibility co-firing biomass for electricity in Missouri

2012 ◽  
Author(s):  
◽  
Zuoming Liu
Keyword(s):  
Power Plants ◽  
Fossil Fuels ◽  
Programming Model ◽  
Renewable Energy Sources ◽  
Transportation Cost ◽  
Partial Replacement ◽  
University Of Missouri ◽  
Biomass Availability ◽  
The Individual ◽  
The Impact

[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] With the growing concerns regarding energy security, sustainability and global warming, more and more efforts have been expended to find clean, safe and renewable energy sources. Bioenergy is considered as one of the significant potential energy resources to serve as a partial replacement for fossil fuels. Use biomass as fuels to produce electricity, i.e. biopower, is one of the most popular uses of bioenergy. The main objective of this study is to investigate the feasibility co-firing biomass for electricity at the existing coal-powered plants in Missouri. A linear programming model was built to simulate the whole process of co-firing biomass in 9 selected power plants with the objective of minimizing the total cost involved in the process. Two biomass co-firing levels (10% and 15%) with three levels (10%, 20% and 30%) of biomass availability are assumed to conduct sensitivity analysis. Moreover, this study also analyzed the impact of transportation cost, resource and harvesting cost on the model's optimization outcomes. The results of the model show that co-firing biomass in those selected power plants costs more than using coal. The additional cost from co-firing biomass will decrease as the availability of biomass increases. The results from the individual plants show that the optimal capacity of biomass co-firing is about 10-15MW based on the settings of this study.

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