More and more frequently recurring questions regarding the possibility of replacing classical coal mining and combustion for obtaining energy have recently motivated a number of research works. Over last 5 years the intensive research in this area has been also conducted in Poland. However, this paper presents two other cases of gasification: in surface gasification reactors, used successfully by Sasol Group and underground gasification based on Linc Energy technology. Coal gasification in South African Sasol can be seen as a very good example of implementation of technology, which allowed this country to develop under certain political and economic conditions. Nowadays, Sasol with current prices of its coal and global crude oil prices manufactures 120 different products, including liquid fuels, olefins, explosives, cosmetics, etc., which can successfully compete with petroleum products. The other case of gasification – underground one based on the...
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
Janusz LASEK, Aleksander SOBOLEWSKI ? Institute for Chemical Processing of Coal (IChPW), Zabrze
Please cite as: CHEMIK 2013, 67, 6, 514-527
The article presents the state of art on thermal bio-refinery in context of pilot and industrial scale deployments. It presents classification and basic characteristics of the unit processes in thermal bio-refinery, techno-economic analysis based on available data and assessment of development of different types of bio-refinery.
According to the definition proposed by the US National Renewable Energy Laboratory (NREL) ?bio-refinery is an integrated system of processes and equipment used to produce fuels, power and chemicals from biomass? . Bio-refinery is therefore a system in which multidirectional and complex conversion of biomass is made. Implementation of thermochemical processes, such as gasification or pyrolysis, is one of the ways of converting biomass to obtain valuable products in bio-refinery. Application of thermo-chemical processes can take place within a single, comprehensive concept , or be part of a larger system, called ?two platforms?, which is divided into two paths: the...
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 .