Registration Number
0221U100362,
0117U000022
, R & D reports
Title
Working out fundamental base for process of nanoporous adsorbents preparation from alkali activated coals of different rank
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Head
Kucherenko Volodymyr O.,
Registration Date
04-01-2021
Organization
L.M. Litvinenko Institute of Physical-Organic Chemistry and Coal Chemistry of the NAS of Ukraine
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Сoal thermolysis solids obtained under heat shock alkali activation (HAS process) were studied by X-ray diffraction, thermogravimetry, IR spectroscopy, and low-temperature nitrogen adsorption. Based on the supramolecular and porous structure characteristics of new materials depending on the temperature and type of coal, the regularities of coals transformation into nanoporous carbons (NCs) are established. In the HAS process, different rank coals (Cdaf = 70.4-95.6%) form NCs with a yield from 22.7% to 77.2%, a specific surface area from 818 m2/g to 2012 m2/g and a total pore volume from 0.269 cm3/g to 1.088 cm3/g. The predominant micropores formation has been found; their portion is 0.64-0.92 with a predominance of subnanopores (78-91%). The main effect of heat shock on the porous structure reveals in the range of 650-850°C, increases with temperature raising and leads to an increase in specific surface area (2.2 times) and pore volume (1.8 times). The effect of heat shock was found to increase linearly with increasing oxygen content of coals. At HAS activation of anthracites, the additional mechanism of subnanopores formation has been identified being not connected with oxygen.
Product Description
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Efimova Irina V.
Abakumov Oleksandr O.
Velychko Oksana O.
Volkova Larysa K.
Kravchenko Viktor V.
Kravchenko Galyna G.
Sabierova Viktoriya O.
Smolyar Olena F.
Tamarkina Yuliya V.
Frolova Irina B.
Chernyshova Maryna I.
Shendrik Tetyana G.
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2021-01-04
