Paliva (Fuels) is a scientific journal issued quarterly by the Faculty of Environmental Technology, ICT Prague. Fuels publishes papers on a broad range of topics covering exploitation, processing, upgrading, and utilization of various types of fuels, and power engineering.

1/2024

4/2014

Preparation and testing of adsorbents for carbon dioxide separating from flue gas

The article is focused on the preparation of special adsorption materials for CO2 removal from flue gases and their testing in a laboratory scale, using model gas mixtures and various methods of testing. A few commercially available adsorbents have been selected and their structural properties and adsorption isotherms for CO2 were measured. On the basis of the results obtained were some of tested adsorbents consequently chemically modified using different procedures and following used to further testing. The aim of the experiments was to design a suitable adsorption material for the pilot unit for the removal of CO2 from flue gas produced in electricity block burning brown coal, which is operated in a power plant station Prunéřov II.

Development of apparatus for measuring the permea-bility of rock samples, and their interaction with

This paper focuses on the development apparatus for long-term dynamic and static experiments with supercritical CO2. Dynamic equipment is monitoring the convection of supercritical CO2 through rock sample. The main objective is to ensure greater volume of supercritical CO2, long-term experiment, evaluation and optimization of flow experiments. Static apparatus allows the study of changes in the material due to interaction with supercritical CO2. Experiments are defining the corrosion of metallic materials, changes in the sample of cement and rocks. For cement and rock samples was examined primarily change the mineral composition of which can result in interactions supercritical CO2 lead to increase the available pore volume or fill them.

Numerical simulations of supercritical injection of CO2 in Dunajovice Sandstone

CO₂ storage is a promising technology to enable further use of coal resources without CO₂ emissions damaging climate. In the Czech Republic, The Dunajovice Sandstone reservoir has been identified as an example of a typical structure suitable for potential geological storage of CO₂ in the Carpathian Foredeep area, and served as a pattern for modelling and simulation purposes in this project. Once injected, CO₂ propagates in its supercritical form and partially dissolves into groundwater. This process acidifies brine and triggers geochemical reactions with the injection wellbore cement, the host rock, as well as the cap rock. These reactions must be quantified and assessed to ensure the security and sustainability of the storage. Here we use the geochemical codes TOUGH2 and TOUGHREACT to estimate the plume propagation as well as the geochemical effects of CO₂ underground injection. Results show a good compatibility of hydrogeological parameters with a 30 years highrate CO₂ injection, which must be confirmed experimentally. We also notice geochemical stability of sandstone and clay, while the cement is subject to huge mineral transformation. The mechanical structure and tightness of such transformed cement should then be assessed.

Study of the influence CO2 for the armament of the injection wells and the surrounding rock massive

Capture and storage of carbon dioxide (CCS - Car-bon Capture and Storage) is considered one of the pos-sible solutions to at least partially reduce CO₂ emissions from human activities, yet benefit from this activity secondary gain in the form of e.g. increasing the yield of some oil fields. The aim of this work is to evaluate the current state of knowledge of these issues, which inc-ludes technical, scientific, environmental and social dimension of storage and propose technical solutions outfit for CO2 injection wells.