Scheme of obtaining carbon nanomaterials, study of their physical-chemical and sorption properties for hydrogen.

The chemical analysis of humic acids and their activated forms based on brown coal from the Maikuben coal basin (Kazakhstan) was carried out. The humic aci

The European Union aims to be climate neutral by 2050. To achieve this ambitious goal, net greenhouse gas emissions must be reduced by at least 55% by 2030. Post-combustion CO₂ capture methods are essential to reduce CO₂ emissions from the chemical industry, power generation, and cement plants. To reduce CO₂, it must be captured and then stored underground or converted into other valuable products. Apromising alternative for CO₂ reduction is the use of humic acid salts (HASs). This work describes a process for the preparation of potassium (HmK) and ammonium (HmA) humic acid salts from oxidized lignite (leonardite). A detailed characterization of the obtained HASs was conducted, including elemental, granulometric, and thermogravimetric analyses, as well as 1H-NMR and IR spectroscopy. Moreover, the CO₂ absorption capacity and absorption rate of HASs were experimentally investigated. The results showed that the absorption capacity of the HASs was up to 10.9 g CO₂ per kg. The CO₂ absorption rate of 30% HmA solution was found to be similar to that of 30% MEA. Additionally, HmA solution demonstrated better efficiency in CO₂ absorption than HmK. One of the issues observed during the CO₂ absorption was foaming of the solutions, which was more noticeable with HmK.

The thermal activation of Kendyrlyk shale (at temperatures of 700–800°C) facilitates the production of a porous carbon material—activated shale. Currently available techniques such as electron...

The chemical analysis of a porous carbon material (PCM) from coal of the Maikube coal basin (Kazakhstan) was carried out in this work. The PCM was obtained

The technique of Сo-catalyst preparation through the step of shungite modifying of Zazhoginsky deposit (Russia). The morphology surface, elemental composition and structural and functional characteristics of the catalyst were studied. As a result of the Fischer-Tropsch synthesis at atmospheric pressure and a temperature range of 260–380°C in the presence of Co-catalyst the optimum content of cobalt in the catalyst system to produce liquid hydrocarbons was determined.