Chinese Journal of Catalysis ›› 2024, Vol. 56: 166-175.DOI: 10.1016/S1872-2067(23)64567-X
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Bai-Chuan Zhou, Wen-Cui Li, Jia Wang, Dan-Hui Sun, Shi-Yu Xiang, Xin-Qian Gao, An-Hui Lu()
Received:
2023-09-23
Accepted:
2023-11-14
Online:
2024-01-18
Published:
2024-01-10
Contact:
*E-mail: anhuilu@dlut.edu.cn (A.-H. Lu).
Supported by:
Bai-Chuan Zhou, Wen-Cui Li, Jia Wang, Dan-Hui Sun, Shi-Yu Xiang, Xin-Qian Gao, An-Hui Lu. PO43- coordinated Co2+ species on yttrium phosphate boosting the valorization of ethanol to butadiene[J]. Chinese Journal of Catalysis, 2024, 56: 166-175.
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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(23)64567-X
Fig. 1. Temperature-dependence of ethanol conversion and products distribution over Co-YPO4 (1.0 wt%) (a), and YPO4 (b). Reaction conditions: 100 mg Co-YPO4 or YPO4, C2H5OH/N2 = 5.7/94.3, WHSV = 2.0 gC2H5OH?gcat-1?h-1. (c) Effect of Co loadings on ethanol conversion and products distribution. (d) Ethanol conversion and the selectivity of butadiene over different catalysts. Reaction conditions: 350 °C, 100 mg catalyst, C2H5OH/N2 = 5.7/94.3, WHSV = 2.0 gC2H5OH?gCat.-1?h-1, Vtotal = 30 mL?min-1.
Fig. 2. Characterization of Co-YPO4. Dark-field STEM image (a) and bright-field STEM image (b) of reduced Co-YPO4 (1.0 wt%) sample, and corresponding elemental maps for O, P, Co, Y (c-f).
Fig. 3. Characterization of Co-YPO4 and YPO4. In situ UV-vis DRS (a) and ex situ XPS (b) of Co-YPO4 (1.0 wt%) catalyst pretreatment at different atmosphere (air, H2, and ethanol). (c) In situ FTIR spectra of CO adsorption on YPO4 and Co-YPO4 (1.0 wt%) catalysts, recorded at -173 °C. (d) 31P MAS NMR spectra of YPO4 and Co-YPO4 (1.0 wt%) catalysts.
Fig. 6. Dependence of product selectivity on the ethanol conversion over Co-YPO4 (a) and YPO4 (b) catalysts. Reaction conditions: 350 °C, C2H5OH/N2 = 5.7/94.3, WHSV = 1-50 gC2H5OH?gCat.-1?h-1, Vtotal = 30 mL?min-1.
Fig. 8. (a) Ethanol conversion and products selectivity as a function of time-on-stream over Co-YPO4. Reaction conditions: 200 mg catalyst mass, T = 350 °C, PC2H5OH = 5.7 kPa, PN2 = 94.3 kPa, Vtotal = 30 mL·min-1. (b,c) Thermogravimetry (TG)-MS profiles of spent Co-YPO4 catalyst under a TPO environment.
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