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Abstract

The most common chemical’s spills in typical transportation accidents are those with petroleum products such as diesel fuel, the consequence of which is an extensive pollution of the soil. In order to plan properly fuel recovery from the soil, it is important to gain information about the soil depth which may be affected by pollutant and to predict the pollutant concentration in different soil layers. This study deals with the impact of basic atmospheric conditions, i.e. air temperature and humidity on the diesel fuel migration through the soil. The diesel fuel was spilled into columns (L = 30 cm; D = 4.6 cm) filled with sandy and clay soil samples, and its concentrations at various depths were measured after 11 days under various air temperature (20 and 40°C) and relative humidity (30–100%) conditions. The effects observed were explained by understanding physical processes, such as fuel evaporation, diffusion and adsorption on soil grains. The increase in temperature results in higher fuel evaporation loss and its faster vertical migration. The relative humidity effect is less pronounced but more complex, and it depends much on the soil type.
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Abstract

The aim of this study was to analyze diesel fuel consumption in Poland and identification of the causes of changes in the needs of individual sectors of the economy for this type of fuel. Time range of the researches covered from 2004 to 2014. Data from the Central Statistical Office (CSO) were the source material. In the years 2004-2014 diesel consumption in Poland was 111 553 thousand tons. In 2014 domestic consumption of diesel fuel was 11 203 thousand tons and it was more than 2 times higher than the level of consumption of this fuel in 2004. The highest consumption of diesel in Poland in the period took place in 2012. The increase in the consumption of diesel fuel in Poland had benefited from increased demand for diesel in transport, which became a result of an increased amount of transport services. The share of transport in the consumption of diesel fuel in Poland for the period 2004- 2014 was about 75%. Another area, which consumes the largest quantity of DF in Poland is agriculture. Consumption of this fuel in agriculture in the years 2004- 2014 increased by 7%. DF consumption in industry and the manufacturing sector it was variable. DF biggest consumption in these sectors of the economy in the period was recorded in 2004. The analyzes did not allow to identify the specific causes of changes in the use of DF in the industry and manufacturing. In transport it showed a relationship between the consumption of diesel fuel and the amount of transport work and the transported cargo.
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Abstract

The aim of the study was to determine the effect of adding bio-components in the form of methyl esters of corn oil to the milesPLUS diesel oil on its fractional composition. The corn biofuel was produced in-house by using an own-design GW-200 reactor. The diesel fuel evaporated at temperatures ranging from 162 to 352oC. The addition of 7, 20 and 40% of a bio-component in principle does not affect the deterioration of the starting point distillation temperatures. They affect the temperature at the end of distillation to a greater extent, resulting in temperatures exceeding 360oC.
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