The Polish power industry is based on coal, both hard coal and brown coal. In the nearest future, for about another 50 to 100 years coal will still be a foundation of Polish and global power industry. Therefore, burning crude oil and natural gas is an unrecoverable waste of these precious resources. Renewable energy sources currently represent only small share of electricity production. Energy from renewable energy sources is expensive and has no ready to use economical solutions. In countries such as Poland, with no large water flows or strong winds, coal for a long time will remain basic energy source for power industry.
Keywords: power industry, coal, renewable energy sources
Coal Gasification using clean coal technology
MACHOWSKA H., KNAPIK E.
Please cite as: CHEMIK 2011, 65, 10, 946-953
The paper presents the gasification process as the foundation of new ?clean? coal technologies. The current situation on global coal market was assessed and the technological and environmental aspects of the gasification process were discussed.
Keywords: gasification, coal, power engineering
Pressure agglomeration of hard and brown coals
DZIK T., MARCINIAK-KOWALSKA J., MADEJSKA L.
Please cite as: CHEMIK 2012, 66, 5, 445-452
The results of granulation of low quality hard coals and brown coal, with grain size under 2 [mm] were presented in the article. The influence of coal size analysis on the content of ash, sulfur and nitrogen were tested, as well as heat of combustion. The agglomeration tests were performed in closed die and the results were the basis for calculation of specific work in granulation process. The pelletizing experiments were made in granulator with flat die, with tha addition of sodium lignosulfonate as binder. The compressive strength of pellets was defined.
Keywords: coal, granulation, pellet, energy, compressive strength
Krzysztof DRESZER, Lucyna WIĘCŁAW-SOLNY, Lesław ZAPART ? Institute for Chemical Processing of Coal (IChPW), Zabrze, Poland
Please cite as: CHEMIK 2013, 67, 6, 490-501
Coal is one of the most important sources of electrical energy in the world economy. Applying appropriate technologies enables its use also in the chemical and fuel sector. The development degree of available technologies guarantees the possibility of manufacturing the desired chemical products with high efficiency and compliance with environmental requirements. The decisive element in applying those technologies is the viability of the used processes, and that depends on the market environment of a considered investment. The paper presents an analysis of technical and economical conditions of converting coal to liquid fuels.
Fossil fuels currently satisfy over 80% of world demand for energy. Still, the energy-climate policy of many countries, especially in the EU, aims at lowering their share in the fuel structure. The effect of such a policy in the EU was i.a. the 2008 adoption of the so called 3x20 climate package, which requires...
Tomasz CHMIELNIAK, Józef POPOWICZ ? Institute for Chemical Processing of Coal (IChPW), Zabrze, Poland
Please cite as: CHEMIK 2013, 67, 5, 415?422
The reasons for the development of fuel gasification technologies in power engineering and chemical industry that has been observed in recent years are high efficiency of the gasification process, the possibility of a multi-purpose use of process gas in both energy production and chemical synthesis, as well as relatively small negative impact of those technologies on the natural environment. Besides the intensive development of fuel gasification technologies, fluidised bed gasification is drawing an increasing interest. Process temperatures lower than in entrained-flow reactors (below the temperature of ash melting) influence the reduction in investment and operation costs and improve the reliability and availability of the discussed technology. Moreover, fluidised bed reactors are considered to be an attractive alternative for gasification process in entrained-flow reactors due to their high performance, moderate oxygen and steam requirements, and high fuel flexibility .