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K2CO3-Containing Composite Sorbents Based on Thermally Modified Alumina: Synthesis, Properties, and Potential Application in a Direct Air Capture/Methanation Process Научная публикация

Журнал Industrial and Engineering Chemistry Research
ISSN: 0888-5885 , E-ISSN: 1520-5045
Вых. Данные Год: 2020, Том: 59, Номер: 15, Страницы: 7130-7139 Страниц : 10 DOI: 10.1021/acs.iecr.9b05457
Ключевые слова Sorption; Potassium; Atmospheric chemistry; Composites; Sorbents
Авторы Veselovskaya Janna V. 1,2 , Lysikov Anton I. 1,2 , Netskina Olga V. 1,2 , Kuleshov Dmitry V. 1 , Okunev Aleksey G. 2,1
Организации
1 Boreskov Institute of Catalysis SB RAS, Lavrentiev Ave. 5, Novosibirsk, Russia 630090
2 Novosibirsk State University, Pirogova str. 1, Novosibirsk, Russia 630090

Информация о финансировании (2)

1 Федеральное агентство научных организаций России 0303-2016-0010
2 Российский фонд фундаментальных исследований 17-73-10068

Реферат: In this work, a series of K2CO3-containing composite materials based on alumina supports with different porous structure were synthesized and studied in a direct air capture process. Alumina supports with the modified porous structure were obtained as a result of the thermal treatment of porous γ-Al2O3 at elevated temperatures. Composite materials were synthesized by impregnating the porous support (unmodified or modified alumina) with an aqueous solution of potassium carbonate. All the K2CO3/Al2O3 sorbents were tested in the process of CO2 absorption from the air with a relative humidity of 25% followed by thermal desorption as a result of heating the material to 200 °C. The composite materials were characterized by X-ray diffraction and temperature-programmed desorption methods. Among the materials studied, the composite sorbent based on the porous alumina thermally modified at T = 750 °C demonstrated the highest dynamic CO2 absorption capacity. This composite material was later tested in a direct air capture/methanation process combining CO2 capture from ambient air and methanation via the catalytic Sabatier reaction. The process was implicated using an adsorber and a catalytic reactor connected in series. To regenerate the composite sorbent after the step of CO2 absorption from ambient air, the adsorber was heated to 200 °C in an H2 flow. The desorbed CO2 was converted into methane in the preheated catalytic reactor containing the Ru/Al2O3 methanation catalyst. The optimization of the operating conditions (namely, the catalytic reactor temperature and the inlet H2 flow rate) allowed for obtaining CH4 from carbon dioxide with a yield of 98%. The thermal energy required for heating the new CO2 sorbent from 25 to 200 °C at the desorption/methanation step of the direct air capture/methanation process was estimated to be 9 MJ per 1 m3 (STP) of produced CH4.
Библиографическая ссылка: Veselovskaya J.V. , Lysikov A.I. , Netskina O.V. , Kuleshov D.V. , Okunev A.G.
K2CO3-Containing Composite Sorbents Based on Thermally Modified Alumina: Synthesis, Properties, and Potential Application in a Direct Air Capture/Methanation Process
Industrial and Engineering Chemistry Research. 2020. V.59. N15. P.7130-7139. DOI: 10.1021/acs.iecr.9b05457 WOS Scopus РИНЦ CAPlus OpenAlex
Даты:
Поступила в редакцию: 1 дек. 2019 г.
Принята к публикации: 31 янв. 2020 г.
Опубликована online: 31 янв. 2020 г.
Опубликована в печати: 15 апр. 2020 г.
Идентификаторы БД:
Web of science: WOS:000526339100033
Scopus: 2-s2.0-85084641561
РИНЦ: 43286420
Chemical Abstracts: 2020:212469
OpenAlex: W3003332204
Цитирование в БД:
БД Цитирований
Web of science 41
Scopus 44
РИНЦ 35
OpenAlex 42
Альметрики: