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CO2气氛下
x FeS-1催化剂的丙烷氧化脱氢制丙烯性能Performance of
x FeS-1 catalysts for propane oxidative dehydrogenation to propylene under CO2 atmosphere- 低碳化学与化工 2025, 50(8): 144-151.
- 作者机构：
1.青岛科技大学 化工学院，山东 青岛 266042
2.上海航天设备制造总厂有限公司，上海 200245
- 作者简介：
刘宏宾（1998—），硕士研究生，研究方向为反应工程，E-mail：4022010052@mails.qust.edu.cn。
单玉领（1987—），博士，副教授，研究方向为反应工程，E-mail：shanyl@qust.edu.cn。
- 基金信息：山东省自然科学基金(ZR2021MB014);国家自然青年基金(22108144)
DOI：10.12434/j.issn.2097-2547.20240521
中图分类号： TQ426.61收稿日期：2024-12-31，
修回日期：2025-03-13，
纸质出版日期：2025-08-25
- 稿件说明：
移动端阅览
刘宏宾,孟伟,于菁等.CO2气氛下xFeS-1催化剂的丙烷氧化脱氢制丙烯性能[J].低碳化学与化工,2025,50(8):144-151.
LIU Hongbin,MENG Wei,YU Jing,et al.Performance of xFeS-1 catalysts for propane oxidative dehydrogenation to propylene under CO2 atmosphere[J].Low-Carbon Chemistry and Chemical Engineering,2025,50(8):144-151.
刘宏宾,孟伟,于菁等.CO2气氛下xFeS-1催化剂的丙烷氧化脱氢制丙烯性能[J].低碳化学与化工,2025,50(8):144-151. DOI： 10.12434/j.issn.2097-2547.20240521.
LIU Hongbin,MENG Wei,YU Jing,et al.Performance of xFeS-1 catalysts for propane oxidative dehydrogenation to propylene under CO2 atmosphere[J].Low-Carbon Chemistry and Chemical Engineering,2025,50(8):144-151. DOI： 10.12434/j.issn.2097-2547.20240521.
摘要
采用CO
2
作为弱氧化剂辅助丙烷脱氢不但能够打破其脱氢热力学平衡，还能够拓展CO
2
利用场景。Fe基催化剂是重要的脱氢催化剂，同时具有较高的CO
2
活化性能，但应用于丙烷脱氢时面临产物选择性低、稳定性差等问题。采用配体保护一步水热法制备了
x
FeS-1系列催化剂，通过调节Fe引入量、反应条件调控了催化剂中FeO
x
物种种类和空间分布，采用XRD、UV-Vis和H
2
-TPR等表征方法分析了催化剂结构、FeO
x
物种种类和分散情况以及还原性能等。结果表明，在580 ℃、丙烷质量空速6.48 h
-1
、
V
(C
3
H
8
):
V
(CO
2
):
V
(Ar) = 4.50:2.25:23.25和总流量30 mL/min条件下，2FeS-1比浸渍法制备的2Fe/S-1的初始丙烷转化频率提高了一倍，引入CO
2
后3.5FeS-1的初始丙烯选择性达到89%，且在CO
2
气氛下未见明显失活。在CO
2
气氛下，
x
FeS-1催化剂的催化丙烷氧化脱氢制丙烯性能显著提升，原因在于高分散的骨架Fe提供了更多的活性位点，CO
2
作为弱氧化剂抑制了丙烷深度氧化，提高了产物选择性并抑制了积炭，为优化丙烷氧化脱氢催化剂的设计及扩大其在CO
2
环境中的应用提供了重要的理论支持。
Abstract
Using CO
2
as a mild oxidant to assist propane dehydrogenation not only breaks the thermodynamic equilibrium of dehydrogenation but also expands the application scenarios of CO
2
utilization. Fe-based catalysts are important dehydrogenation catalysts with high CO
2
activation capability
but facing problems of low product selectivity and poor stability when applied to propane dehydrogenation. A series of
x
FeS-1 catalysts were synthesized by ligand-protected one-step hydrothermal method. By adjusting the Fe loadings and reaction conditions
the types and spatial distributions of FeO
x
species in the catalysts were controlled. XRD
UV-Vis
H
2
-TPR and other characterization t
echniques were used to analyze the structures
types and distributions of FeO
x
species and reduction properties of catalysts. The results reveal that under reaction conditions of 580 ℃
propane weight hourly space velocity of 6.48 h
-1
V
(C
3
H
8
):
V
(CO
2
):
V
(Ar) = 4.50:2.25:23.25 and total flow rate of 30 mL/min
the initial propane conversion frequency of 2FeS-1 is doubled compared to 2Fe/S-1 prepared by impregnation method
and the initial propylene selectivity of 3.5FeS-1 reaches 89% after introducing CO
2
with no significant deactivation observed at CO
2
atmosphere. Under CO
2
atmosphere
the performance of
x
FeS-1 catalysts for propane oxidative dehydrogenation to propylene is significantly improved
because the highly dispersed framework Fe provides more active sites
and CO
2
acts as the mild oxidant to suppress deep propane oxidation to improve product selectivity and mitigate carbon deposition. This provides valuable theoretical support for optimizing the design of catalysts for propane oxidative dehydrogenation and expanding their application under CO
2
atmosphere.
关键词
Keywords
references
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