Direct Synthesis of Novel Sponge-Like Porous MnO x Catalysts Derived from Mn-MOFs for High-Efficiently Eliminate o-Dichl
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ORIGINAL ARTICLE
Direct Synthesis of Novel Sponge‑Like Porous MnOx Catalysts Derived from Mn‑MOFs for High‑Efficiently Eliminate o‑Dichlorobenzene by Catalytic Combustion Weitong Ling1,2 · Haijun Zhao1 · Zhicheng Tang1,3 · Fei Zha2 Received: 7 May 2020 / Accepted: 11 July 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract A series of novel lamellar sponge-like MnOx porous catalysts derived from Mn-MOFs have been prepared via modulatorassisted synthesis method and their catalytic performance has been evaluated for o-dichlorobenzene (o-DCB) catalytic combustion reaction. The catalysts were characterized by BET, XRD, Raman, SEM, TEM, XPS, H 2-TPR, O2-TPD and other techniques to test the physicochemical properties of the catalysts. The results showed that MnOx had different morphology and properties. The active oxygen species and large specific surface area of MnOx played an important role in the catalytic combustion of o-dichlorobenzene. The T 90 of the laminar catalyst M nOx-D, MnOx-D/M, MnOx-D/H/M, and M nOx-D/H was 321, 341, 346, and 355 °C, respectively. M nOx-D has good catalytic activity for the catalytic combustion of o-DCB, which confirmed that surface lattice oxygen played a crucial role in o-DCB combustion. Additionally, they had good hydrothermal stability, thermal stability and water resistance. Keywords MnOx · Catalytic combustion · o-Dichlorobenzene · Lamellar · Sponge-like
1 Introduction Chlorinated volatile organic compounds (CVOCs), such as 1,2-dichloroethane (DCE), dichloromethane (DCM), trichloroethylene (TCE) and chlorobenzene (CB) are widely used in industrial processes as raw materials and solvent [1]. Due to their widespread applications in industry, CVOCs became the largest poisonous component in air and water pollution [2, 3]. In fact, CVOCs play a significant role in the processes of tropospheric ozone formation and stratospheric ozone depletion [4]. Thus, the abatement of chlorinated compounds * Zhicheng Tang [email protected] 1
State Key Laboratory for Oxo Synthesis and Selective Oxidation, and National Engineering Research Center for Fine Petrochemical Intermediates, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
2
College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
3
Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
in waste gases is highly relevant [5]. The eliminate VOCs green have been the urgent problem in the word [6]. Various CVOCs remove methods are proposed to solve this problem, such as adsorption, advanced oxidation, electrochemical method, metal method and photocatalytic method [7–11]. Among the fore-mentioned technologies, catalytic combustion is an effective technology for the complete removal of volatile organic pollutants form flue gas. The researchers explored the physical method to enrich and purify CVOCs to reduce the emission of
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