Catalytic oxidation of toluene over the low-grade palygorskite clay from Linze region supported highly dispersed MnCe oxides catalysts: Preparation and performance

IF 5.3 2区地球科学 Q2 CHEMISTRY, PHYSICAL

Applied Clay Science Pub Date : 2024-12-19 DOI:10.1016/j.clay.2024.107681

Xuehua Zou , Xinyu Guo , Mengyuan Peng , Lanlan Dai , Fan Xu , Ping Zhang , Yuefei Zhou , Tianhu Chen , Chengzhu Zhu , Qiaoqin Xie

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Abstract

The natural palygorskite clay (Pal) resources are widely distributed in the Tianshui-Jingyuan-Huining-Linze sedimentary basins from east to west, Gansu Province, Northwest China. However, the application of this Pal has received insufficient attention due to the low-grade of palygorskite and hybrid mineral assemblage. In this paper, the Linze Pal was used as the support to prepare a series of Mn-Ce/Pal catalysts for catalytic oxidation of toluene. The catalysts were characterized by XRD, BET, Raman, XPS spectroscopy and TEM analysis. The results indicated that the particle sizes of Mn oxides were decreased and the dispersions were improved after doping with cerium. The strong interaction between Mn and Ce oxides increased the specific surface area, the content of Mn³⁺ and Ce³⁺ and the surface-adsorbed oxygen species of the Mn-Ce/Pal catalysts with the decrease of doping amount of cerium, which had significant effect on the catalytic activities of the catalysts for toluene oxidation. The 5 %Mn_0.9Ce_0.1/Pal catalyst exhibited the best performance for toluene oxidation and had a T₉₀ at 318 °C; meanwhile, this studied catalyst also displayed high long-term and regeneration stabilities. Therefore, this low-grade palygorskite clay in Linze region can be considered as a potential support to prepare the catalysts for toluene conversion.

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来源期刊

Applied Clay Science 地学-矿物学

CiteScore

10.30

自引率

10.70%

发文量

289

审稿时长

39 days

期刊介绍： Applied Clay Science aims to be an international journal attracting high quality scientific papers on clays and clay minerals, including research papers, reviews, and technical notes. The journal covers typical subjects of Fundamental and Applied Clay Science such as: • Synthesis and purification • Structural, crystallographic and mineralogical properties of clays and clay minerals • Thermal properties of clays and clay minerals • Physico-chemical properties including i) surface and interface properties; ii) thermodynamic properties; iii) mechanical properties • Interaction with water, with polar and apolar molecules • Colloidal properties and rheology • Adsorption, Intercalation, Ionic exchange • Genesis and deposits of clay minerals • Geology and geochemistry of clays • Modification of clays and clay minerals properties by thermal and physical treatments • Modification by chemical treatments with organic and inorganic molecules(organoclays, pillared clays) • Modification by biological microorganisms. etc...