TY - JOUR
T1 - Highly active Fe-Co-Zn/K-Al2O3 catalysts for CO2 hydrogenation to light olefins
AU - Witoon, Thongthai
AU - Chaipraditgul, Nawapat
AU - Numpilai, Thanapha
AU - Lapkeatseree, Vittawin
AU - Ayodele, Bamidele Victor
AU - Cheng, Chin Kui
AU - Siri-Nguan, Nuchanart
AU - Sornchamni, Thana
AU - Limtrakul, Jumras
N1 - Funding Information:
This research was supported in part by the Thailand Research Fund and the Kasetsart University (grant no. RSA6280007), the Center of Excellence on Petrochemical and Materials Technology (PETROMAT), the Nanotechnology Center (NANOTEC), NSTDA, the Ministry of Science and Technology, Thailand, through its program of Research Network of NANOTEC (RNN), the Postdoctoral Fellowship from Vidyasirimedhi Institute of Science and Technology, the Program Management Unit for Human Resources & Institutional Development, Research and Innovation (B05F630097), TTSF research project supported by Thailand Toray Science Foundation and the Kasetsart University Research and Development Institute (KURDI) through its program of Development of Advance Researcher Competence System for Competitiveness in Agriculture and Food (FF(KU) 25.64).
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/4/6
Y1 - 2021/4/6
N2 - CO2 hydrogenation to light olefins over Fe-Co-Zn/K-Al2O3 catalysts with different Zn loading contents (0–1.74 wt%) is studied. The addition of Zn improves the dispersion and the reducibility of iron oxides. The amount of CO adsorbed of the catalysts showed a volcanic trend as a function of Zn content with its maximum of 2.42 μmol g−1 at 0.58 wt% Zn, suggesting an increase of number of active sites. The 0.58 wt% Zn-promoted Fe-Co/K-Al2O3 catalyst shows superior activity for light olefins yield (19.9%) under the optimum operating conditions of 340 °C, 25 bar, 9,000 mL gcat−1 h−1 and H2 to CO2 ratio = 4. A gradual decrease in olefin to paraffin ratio with an almost constant CO2 conversion as a function of time-on-stream is observed, which is related to a continuous increase of iron carbide content, indicating that the iron carbide can be acted as the active site for paraffins production.
AB - CO2 hydrogenation to light olefins over Fe-Co-Zn/K-Al2O3 catalysts with different Zn loading contents (0–1.74 wt%) is studied. The addition of Zn improves the dispersion and the reducibility of iron oxides. The amount of CO adsorbed of the catalysts showed a volcanic trend as a function of Zn content with its maximum of 2.42 μmol g−1 at 0.58 wt% Zn, suggesting an increase of number of active sites. The 0.58 wt% Zn-promoted Fe-Co/K-Al2O3 catalyst shows superior activity for light olefins yield (19.9%) under the optimum operating conditions of 340 °C, 25 bar, 9,000 mL gcat−1 h−1 and H2 to CO2 ratio = 4. A gradual decrease in olefin to paraffin ratio with an almost constant CO2 conversion as a function of time-on-stream is observed, which is related to a continuous increase of iron carbide content, indicating that the iron carbide can be acted as the active site for paraffins production.
KW - CO hydrogenation
KW - Fe-based catalysts
KW - Light olefins
KW - Operating conditions
KW - Promoters
UR - http://www.scopus.com/inward/record.url?scp=85099283251&partnerID=8YFLogxK
U2 - 10.1016/j.ces.2020.116428
DO - 10.1016/j.ces.2020.116428
M3 - Article
AN - SCOPUS:85099283251
SN - 0009-2509
VL - 233
JO - Chemical Engineering Science
JF - Chemical Engineering Science
M1 - 116428
ER -
