Suchergebnisse

Nowadays, when the energy, industry and transport sectors are adapting to climate change and need to reduce their environmental impact, it is vital that the optimal solutions are found for individual countries and their different circumstances. Territories, which have a hydrocarbon deficit, should use non-conventional energy sources while the countries with substantial resources of hydrocarbons should be focused on the strategy of raising the energy efficiency, i.e. to reduce the specific consumption of fuel consumed. The paper discusses these scenarios and describes some innovative technologies for both cases. Energy production from biomass is encouraged in some European countries by the granting of generous economic subsidies so that renewable energy plants, such as anaerobic digestion plants that produce biogas for use in internal combustion engines, in particular, are receiving much funding. An alternative technology for biogas valorisation could be that of biomethane (so called green gas) production through biogas purification and upgrading processes to remove CO2, H2S and water vapour. Different technologies have been proposed to remove CO2 from gas streams, such as physical absorption, absorption by chemical solvents, cryogenic and membrane separation and CO2 fixation by chemical or biological methods. Production of biomethane and its introduction into the natural gas grid or its use as a fuel for vehicles could increase the energy efficiency and reduce specific emissions (combined cycle gas turbines, district heating of CHP units, methane powered vehicles). A simple and low-cost method of improving energy efficiency and environmental safety of transport by introducing into hydrocarbon fuels micro doses of a universal multifunctional additive is proposed. The method will make a significant contribution towards solving the problems of adapting to global climate change and improving the environment. It is capable of reducing specific fuel consumption by up to 12% and the requirements for a gasoline octane number by 10 points. It significantly reduces emission levels of greenhouse gases and toxic substances and provides complex improvement of the properties of fuels and the condition of engines. © 2017 WIT Press. ; In order to evaluate the pollutant dispersion a Gaussian model was used. The meteorological data was supplied by the Piedmont Regional Agency for the Environmental Protection (ARPA). ; ACKNOWLEDGEMENT This research was supported by Act 211 Government of the Russian Federation, contract № 02.A03.21.0006.

Nowadays the world energy consumption continuously increases due to various human-related activities. Increasing energy efficiency and decarbonizing the economic development, especially with measures aimed at the most energy-intensive sectors (industry, buildings, and mobility) is therefore a way towards the "eco-sustainable" community. The energy efficiency improving has environmental implications as it results in a reduction of the atmosphere polluting emissions. For the GHG (and in particular for the carbon dioxide) it is necessary to study and to analyze the so-called "negative technologies" - technologies that allow a carbon dioxide concentrations reduction. Considering the strategies in order to limit the climate change and to improve the air quality, it is necessary to assess the impacts of both these phenomena and therefore to identify synergies (win - win) and avoiding solutions that improve one of the two phenomena and worsen the other one (win - lose). The aim of this work is to analyze the opportunities of the "negative technologies" application for the climate change mitigation and to formulate the hypothesis of mobility modification using methods for the fuel consumption reduction. The negative technologies were studied from a technological point of view analyzing the potential advantages and disadvantages and stressing the technical challenge. The new approach for reduction of environmental and climatic impacts of vehicle operation on the environment by changes in the albedo of a vehicle roof is suggested. The proposed method allows to reduce the fuel consumption and greenhouse gases emission while idle with the engine running. The cost-effective modification in fuel quality using the microdose of the developed surface-active additive enables to reduce the specific fuel consumption dramatically, and substantially improves the environmental characteristics of vehicles operation. The combination of the proposed methods provides the opportunity for significant reduction of the GNG and toxic substances emissions by motor transport. © 2018 WIT Press. ; ACKNOWLEDGEMENT This research was funded by the Russian Scientific Fund (Research Project 15-19-30001) and was supported by Act 211 Government of the Russian Federation, contract № 02.A03.21.0006.