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4. Conversion of CO2 to Light Hydrocarbons by Using FeCx Catalysts Derived from Iron Nitrate Co-pyrolyzing with Melamine, Bulk g-C3N4, or Defective g-C3N4.

Author

To, Dien-Thien, Juan, Joon Ching, Tsai, Meng-Hsuan, Wang, Chia-Hsin, Pao, Chih-Wen, Chen, Chi-Liang, and Lin, Yu-Chuan

Subjects
FERRIC nitrate, HYDROCARBONS, CATALYSTS, ALKENES, CEMENTITE, MELAMINE
Abstract

FeCx catalysts (Fe-CN-Py) were synthesized by co-pyrolyzing the mixture of iron nitrate and a CN source (melamine, bulk g-C3N4 (b-C3N4), or defective g-C3N4 (d-C3N4)). The physicochemical properties of Fe-CN-Py catalysts and their activities of CO2 hydrogenation to light hydrocarbon (C2-C6) were analyzed. The results indicated that Fe-d-C3N4-(0.3)-Py is the most promising with the highest CO2 conversion (47.2%), olefin yield (10.8%), and olefin space-time yield (STY = 4.5 µmol olefin/s/gFe). The promising activity of Fe-d-C3N4-(0.3)-Py was attributed to its high concentration of surface FeCx. The correlation between surface FeCx and the STY of hydrocarbons and olefins was established. [ABSTRACT FROM AUTHOR]

Published
2023
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6. Copper Phyllosilicates-Derived Catalysts in the Production of Alcohols from Hydrogenation of Carboxylates, Carboxylic Acids, Carbonates, Formyls, and CO2: A Review

Author

Yu Chuan Lin and Dien Thien To

Subjects
Dopant, genetic structures, Chemistry, Synthesis methods, chemistry.chemical_element, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, lcsh:Chemical technology, 01 natural sciences, Copper, Catalysis, 0104 chemical sciences, lcsh:Chemistry, lcsh:QD1-999, copper, Organic chemistry, phyllosilicates, lcsh:TP1-1185, sense organs, Physical and Theoretical Chemistry, hydrogenation, 0210 nano-technology, Dispersion (chemistry)
Abstract

Copper phyllosilicates-derived catalysts (CuPS-cats) have been intensively explored in the past two decades due to their promising activity in carbonyls hydrogenation. However, CuPS-cats have not been completely reviewed. This paper focuses on the aspects concerning CuPS-cats from synthesis methods, effects of preparation conditions, and dopant to catalytic applications of CuPS-cats. The applications of CuPS-cats include the hydrogenation of carboxylates, carboxylic acids, carbonates, formyls, and CO2 to their respective alcohols. Besides, important factors such as the Cu dispersion, Cu+ and Cu0 surface area, particles size, interaction between Cu and supports and dopants, morphologies, and spatial effect on catalytic performance of CuPS-cats are discussed. The deactivation and remedial actions to improve the stability of CuPS-cats are summarized. It ends up with the challenges and prospective by using this type of catalyst.

Published
2021

8. Development of Flexible Catalyst Material for Internal Dry Reforming

Author

Thi, Nguyen, Huong, Giang, Dien, Thien, Sakamoto, Mio, Duc, Tin, Doan, Chanh, Mau, Chien, Quang, Tuyen, Sasaki, Kazunari, and Shiratori, Yusuke

Abstract

Paper-structured catalyst (PSC), flexible catalyst can be applied on the anode material, is now being studied. Catalytic activities of three types of Ni-loaded PSCs, (a) without the dispersion of support oxide particles in the fiber network (Ni-PSC), (b) with the dispersion of (Mg,Al)O derived from hydrotalcite (HT) (Ni/HT-PSC) and (c) with the dispersion of (Ce,Zr)O2 (Ni/(Ce,Zr)O2-PSC), for dry reforming of methane (CH4 + CO2 - 2H2 + 2CO) were evaluated at the operating temperature of 750 oC. Ni/(Ce,Zr)O2-PSC was found to exhibit the highest CH4 conversion (87 %) with the lowest degradation rate. (Ce,Zr)O2 solid solution having oxygen storage capacity (OSC) contributed to remove carbonaceous species deposited on the catalyst surface to regenerate active sites for dry reforming reaction.

Published
2017

9. Copper Phyllosilicates-Derived Catalysts in the Production of Alcohols from Hydrogenation of Carboxylates, Carboxylic Acids, Carbonates, Formyls, and CO 2 : A Review.

Author

To, Dien-Thien, Lin, Yu-Chuan, and Hamidreza, Arandiyan

Subjects
*COPPER catalysts, *CARBOXYLIC acids, *CARBON dioxide, *HYDROGENATION, *CARBONATES, *CARBOXYLATES
Abstract

Copper phyllosilicates-derived catalysts (CuPS-cats) have been intensively explored in the past two decades due to their promising activity in carbonyls hydrogenation. However, CuPS-cats have not been completely reviewed. This paper focuses on the aspects concerning CuPS-cats from synthesis methods, effects of preparation conditions, and dopant to catalytic applications of CuPS-cats. The applications of CuPS-cats include the hydrogenation of carboxylates, carboxylic acids, carbonates, formyls, and CO2 to their respective alcohols. Besides, important factors such as the Cu dispersion, Cu+ and Cu0 surface areas, particles size, interaction between Cu and supports and dopants, morphologies, and spatial effect on catalytic performance of CuPS-cats are discussed. The deactivation and remedial actions to improve the stability of CuPS-cats are summarized. It ends up with the challenges and prospective by using this type of catalyst. [ABSTRACT FROM AUTHOR]

Published
2021
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