Category Archives: Year 2016 Issue 8

Assessment of the measurement uncertainty of the determination of the methane steam conversion catalyst activity in a 4-channel Tiomkin-type reactor

Kamila MICHALSKA, Janusz KRUK* - New Chemical Syntheses Institute, Puławy, Poland Please cite as: CHEMIK 2016, 70, 8, 426–431 Steam reforming of natural gas is currently the most common process, starting the natural gas conversion to carbon monoxide and hydrogen, which are substrates for multiple syntheses of basic products vital for the economy. The process is conducted in gas heated tubular reactors filled with relevant catalyst. The process of methane conversion with steam, represented by the equation...
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Current strategies for searching through structure and chemical compound databases

Grzegorz FIC*, Mariusz SKOMRA, Barbara DĘBSKA – Faculty of Chemistry, Rzeszow University of Technology, Rzeszów, Poland Please cite as: CHEMIK 2016, 70, 8, 410–418 Modern databases which contain chemical compound structures are characterized by a large increase of information. Table 1 shows the increase of data in Pubchem database over the last years. This base originated in 2004 and is managed by the National Center for Biotechnology Information (NCBI) at the US National Institutes of Health (NIH)....
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Characterization of the polycyclic aromatic hydrocarbons emitted from a compression ignition engine powered with biofuels of the 1st and 2nd generation

Joanna CZARNOCKA*, Małgorzata ODZIEMKOWSKA – PIMOT (Automotive Industry Institute), Warsaw, Poland Please cite as: CHEMIK 2016, 70, 8, 419–425 Motor vehicle emissions are an important source of atmospheric air pollution, contributing to the development of respiratory system diseases, tumours, and genetic changes. International regulations discern some substances that are harmful to the environment, such as carbon monoxide (CO), unburnt hydrocarbons (HC), nitrogen oxides (NOx), or particulate matter (PM). The emissions of the chemical compounds mentioned above from...
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