MnNi基类水滑石衍生复合氧化物催化氧化丙酮及乙酸乙酯性能研究

成越; 赵丹娅; 周集体; 赵玲

doi:10.13205/j.hjgc.202610014

MnNi基类水滑石衍生复合氧化物催化氧化丙酮及乙酸乙酯性能研究

doi: 10.13205/j.hjgc.202610014

成越¹,
赵丹娅¹,
周集体^1,2,
赵玲^1, ,

1. 内蒙古大学生态与环境学院, 呼和浩特 010031;
2. 大连理工大学工业生态与环境工程教育部重点实验室, 辽宁大连 116024

基金项目:

内蒙古自治区科技计划项目（2023YFHH0120）；呼和浩特市研发投入激励项目（2025-规-研-1）

详细信息

作者简介:
成越（1999—），女，博士研究生在读，主要研究方向为大气污染控制。evelyncy221@163.com

通讯作者:
赵玲（1981—），女，博士，教授，主要研究方向为大气污染控制。nmzhl@hotmail.com

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出版历程
- 收稿日期: 2025-10-28
- 网络出版日期: 2026-11-10

Catalytic oxidation of acetone and ethyl acetate over MnNi-based hydrotalcite-derived oxides

CHENG Yue¹,
ZHAO Danya¹,
ZHOU Jiti^1,2,
ZHAO Ling^{1
, ,}

1. College of Ecology and Environment, Inner Mongolia University, Hohhot 010031, China;
2. Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, Dalian University of Technology, Dalian 116024, China

摘要

摘要: 采用NaOH、Na₂CO₃双滴法成功制备了不同n（Mn）∶n（Ni）的Mn _x Ni_3-_xAl-LDH前驱体，经煅烧得到相应的Mn _xNi_3-_xAlO氧化物系列催化剂，系统研究了该系列催化剂在单一及混合丙酮、乙酸乙酯体系下的催化氧化性能。结果表明，当n（Mn）∶n（Ni）=2.5∶0.5时，所得Mn_2.5Ni_0.5AlO催化剂性能最优，对单一丙酮和乙酸乙酯的T₉₀均为197 ℃。在V（丙酮）∶V（乙酸乙酯）分别为1∶1、1∶2、2∶1的混合体系催化氧化中，丙酮和乙酸乙酯的T₉₀均维持在206~208 ℃，表明该催化剂在混合体系中仍具较高活性与稳定性。XRD和XPS结果显示：Mn_2.5Ni_0.5AlO催化剂中Mn与Ni之间的协同作用，以及较高比例的Mn³⁺（69.18%）和表面吸附氧（37.59%）共同促进了氧空位的形成与氧迁移，增强了催化氧化性能。原位红外分析表明，丙酮经烯醇化复合物、乙酸盐中间体逐步氧化为CO₂和H₂O，乙酸乙酯亦经乙酸盐、甲酸盐等中间物矿化，混合体系下仍遵循类似机理。研究揭示了MnNi基LDH衍生氧化物在混合VOCs催化氧化中的优异性能与稳定性，为高效低成本催化剂的设计提供了新思路。
- 丙酮 /
- 乙酸乙酯 /
- 催化氧化 /
- 原位红外
Abstract: A series of Mn_xNi_3-xAl-LDH precursors with various Mn∶Ni molar ratios were synthesized via a NaOH-Na₂CO₃ co-precipitation method， and the corresponding Mn_xNi_3-xAlO oxides were obtained after calcination. The catalytic oxidation performances of these catalysts for single and mixed acetone-ethyl acetate systems were systematically investigated. The results indicated that the Mn_2.5Ni_0.5AlO catalyst exhibited the best activity， with T₉₀ values of 197 ℃ for both acetone and ethyl acetate. In the mixed VOCs catalytic oxidation systems （acetone∶ethyl acetate = 1∶1，1∶2，2∶1，volume ratio）， the T₉₀ remained within 206 to 208 ℃， demonstrating excellent resistance to component interference. XRD and XPS analyses revealed that the synergistic effect between Mn and Ni， as well as the high proportion of Mn³⁺ （69.18%） and surface adsorbed oxygen （37.59%） of Mn_2.5Ni_0.5AlO catalyst， facilitated oxygen vacancy formation and oxygen mobility， thereby enhancing catalytic activity. In situ FTIR spectra indicated that acetone and ethyl acetate were oxidized via enolate and acetate/formate intermediates to CO₂ and H₂O， following similar mechanisms in both single and mixed systems. This work highlights the superior performance and stability of MnNi-based LDH-derived oxides in mixed VOCs oxidation， providing valuable insights for the development of cost-effective and high-efficiency catalysts.
- acetone /
- ethyl acetate /
- catalytic oxidation /
- in situ FTIR

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