Liquid CO2 is a non-polar fluid, and the injection of fluid into coal seam causes strong water–rock interaction between inorganic minerals organic matter in acidic fluid. The are thereby corroded precipitated to different degrees, dissolved extracted, which further changes physical chemical properties rock. Three kinds samples with metamorphic degrees were selected as research objects, methods ...

Fluorine appears in coal and is released into the atmosphere upon combustion, resulting harmful impacts on environment life, which needs to be removed from before utilization. Coal can processed by flotation gravity separation reduce its fluorine content. In this study, a lignite sample mine Shaanxi Province, China, was characterized using float–sink test, sieving X-ray diffraction (XRD), polar...

Abstract This study investigated the impact of energy consumption on human development in South Africa, using annual data from 1990 to 2019. The used disaggregated measures namely: oil products consumption; electricity renewable natural gas; coal and lignite; total at an aggregate level. Human Development Index (HDI) was as a measure development. By employing autoregressive distributed lag boun...

Reclaimed mine soils (RMS) which develop on post-mining sites play significant role in Carbon sequestration in new ecosystems, especially in local range on areas disturbed by human activity. This study presents the potential for Carbon sequestration in RMS developing on 3 post surface mining areas in Poland (Central Europe) reforested with Scots pine (Pinus sylvestris L). Research was conducted...