Brown Coal Bulletin, 2020 (vol. 60), issue 1
Pyrolysis and direct coal liquefaction - maltenes addition effect on the vacuum gas oil hydrocracking
Dr. José Miguel Hidalgo Herrador, Ing. Jakub Fratczak, Ing. Aleš Vráblík, Dr. José Luis Gómez de la Fuente, Ing. Lukáš Anděl, Ing. Petr Svoboda, CSc., Jaroslav Kusý, RNDr. Ing. Josef Valeš
Zpravodaj Hnědé uhlí 2020, 60(1)
The maltenes fraction of coal tar pyrolysis or direct coal liquefaction product with a boiling range higher than 220 °C was mixed with vacuum gas oil for hydrocracking. The aim of the work was to study how an addition of coal derived compounds addition to vacuum gas oil affects the final product characteristics (comparing the tests using pure vacuum gas oil). Nickel tungsten supported on silico-alumina catalysts were used. Tests were performed in bench-scale (fast screening) and pilot-scale continuous flow reactors. For the fast screening, the feedstock and liquid products were analysed by simulated distillation. For longer-term tests, gases and liquids...
History of lignite mining at Malhostice
Ing. Tomáš Vácha
Zpravodaj Hnědé uhlí 2020, 60(1)
The article summarizes the history of lignite extraction in a separate brown coal basin near the village of Malhostice in the Teplice district. It describes the obvious underground mines active in this basin and the mining methods used by these mines in the extraction of the coal seam.
Long-term prognosis of soil dump consolidation based on satellite radar interferometry (InSAR) data
RNDr. Jan Burda, Ph.D., Mgr. Jan Kolomazník
Zpravodaj Hnědé uhlí 2020, 60(1)
Satellite radar interferometry is state-of-the-art method of remote exploration of the Earth. Data from the sensors of European satellite constellation Sentinel-1 (ESA, 2020), which systematically captures radar images of the world's land at fixed intervals and from several directions, was used to demonstrate the capability of using radar satellite interferometry in retrospective evaluation of earth's surface movements on abandoned and dump sites being normally outside the scope of regular monitoring. The results show how these data and method facilitate forecasting when forecasting the consolidation of dump surface, whether in the line of the selected...
Evaluation of the impact of hydric reclamation of brown coal open pit mines on fresh air quality in the Ústí region
Ing. Jan Brejcha
Zpravodaj Hnědé uhlí 2020, 60(1)
The article provides the results of the "Study of the impact of hydric reclamation of surface mines on fresh air quality and microclimate in the ústí region". The study upgrades the results of the project "Impacts on microclimate, air quality, water and soil ecosystems within the framework of the hydric reclamation of brown coal open pit mines", which was carried on with the support of Technology Agency of Czech Republic under No. TA01020592 within the period 2011 to 2014. Based on the evaluation of the measured data, it can be assumed that the change in microclimatic conditions on the reclaimed area of and including Lake Most, will not change climatic...