Coking of Pt/γ-Al2O3 catalyst in landfill gas deoxygen and its effects on catalytic performance

被引:1
作者
Yang, Xinyu [1 ]
Chen, Zezhi [1 ]
Gong, Huijuan [1 ,2 ]
机构
[1] Nanjing Univ, Sch Environm, State Key Lab Pollut Control & Resource Reuse, Nanjing 210023, Peoples R China
[2] Nanjing Univ, Ctr Mat Anal, Nanjing 210093, Peoples R China
来源
CHINESE JOURNAL OF CHEMICAL ENGINEERING | 2023年 / 57卷
关键词
Landfill gas; Deoxygen; Pt/gamma-Al2O3; Volatile organic compounds; Coke deposition; CHEMISORBED OXYGEN; METHANE; DEACTIVATION; OXIDATION; TEMPERATURE; COMBUSTION; OXIDES; COKE;
D O I
10.1016/j.cjche.2022.07.026
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Catalytic oxidation of CH4 has been proved to be an attractive option for landfill gas (LFG) upgrading. However, coking of catalysts in catalytic LFG deoxygen has been clearly observed in industrial applications. In this regard, it is necessary to investigate whether coke deposition originates from CH4 or volatile organic compounds present in LFG, and the influence of coke deposition on catalytic performance. Herein, we evaluate the LFG deoxygen on Pt/gamma-Al2O3 catalyst in simulated LFG (CH4, CO2, O-2, N-2) and its co-feed with representative volatile organic compounds, ethylbenzene, toluene, benzene and cyclohexane. The results show that the coking of the catalyst is originated from volatile organic compounds rather than CH4. The Pt/gamma-Al2O3 catalyst does not deactivate during LFG deoxygen process, even significant amount of coke deposited, up to 18.15% (mass). Characterization analyses reveal that although coke deposition overall covers the catalyst surface, resulting in mesopores blockage and a reduced number of accessible Pt sites, however, the coke formed, H-rich carbonaceous components, behaves as counterpart for O-2 elimination. Besides, the coke deposited is mainly filamentous. Thus, coke formation has little negative effect on the overall catalytic performance of Pt/gamma-Al2O3 catalyst ultimately. The results obtained in this work are helpful for the rational design of robust Pt based catalysts for LFG deoxygen without undue attention to their coking properties, and also favor the innovation of more attractive purification scheme configurations. (C) 2022 The Chemical Industry and Engineering Society of China, and Chemical Industry Press Co., Ltd. All rights reserved.
引用
收藏
页码:224 / 232
页数:9
相关论文
共 50 条
[31]   Insights into the effects of steam on propane dehydrogenation over a Pt/Al2O3 catalyst [J].
Shan, Yu-Ling ;
Zhu, Yi-An ;
Sui, Zhi-Jun ;
Chen, De ;
Zhou, Xing-Gui .
CATALYSIS SCIENCE & TECHNOLOGY, 2015, 5 (08) :3991-4000
[32]   On the performance stability of the MnOx/Al2O3 catalyst for VOC incineration under forced adsorption-catalytic cycling conditions [J].
Zagoruiko, Andrey N. ;
Mokrinskii, Vladimir V. ;
Veniaminov, Sergey A. ;
Noskov, Alexander S. .
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING, 2017, 5 (06) :5850-5856
[33]   A simple method to regulate surface hydroxy groups on Al2O3 for improving catalytic oxidation performance for HCHO on Pt/Al2O3 [J].
Zhang, Zhilin ;
Ma, Jinzhu ;
He, Hong .
CATALYSIS SCIENCE & TECHNOLOGY, 2022, 12 (20) :6195-6203
[34]   Partial oxidation of methane to syngas -: Effects of support and promoter on catalytic performance of Ni/Al2O3 catalyst [J].
Yu, L ;
Yuan, SH ;
Tian, JY ;
Wang, S ;
Chu, W .
CHINESE JOURNAL OF CATALYSIS, 2001, 22 (04) :383-386
[35]   Catalytic ozonation process for treating coking biochemical wastewater based on an Fe-Mn/Al2O3 catalyst [J].
Qin, Yihe ;
Yuan, Run ;
Luo, Shaojun ;
Huang, Haiming ;
He, Xuwen .
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2025, 713
[36]   Effect of platinum dispersion on the catalytic activity of Pt/Al2O3 for the oxidation of carbon monoxide and propene [J].
Haneda, Masaaki ;
Watanabe, Tokuya ;
Kamiuchi, Naoto ;
Ozawa, Masakuni .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2013, 142 :8-14
[37]   Catalytic methanation over nanoparticle heterostructure of Ru/Fe/Ce/γ-Al2O3 catalyst: Performance and characterisation [J].
Iqbal, Malik Muhammad Asif ;
Toemen, Susilawati ;
bakar, Wan Azelee Wan Abu ;
Razak, Fazira Ilyana Abdul ;
Rosid, Salmiah Jamal Mat ;
Azelee, Nur Izyan Wan .
RENEWABLE ENERGY, 2020, 162 :513-524
[38]   Coking behavior on a Ni–Mo/Al2O3 catalyst for the hydrocracking of vacuum residue [J].
Hyukmin Kweon ;
Chinh Nguyen-Huy ;
Hanna Kim ;
Youngil Lee ;
Eun Woo Shin .
Reaction Kinetics, Mechanisms and Catalysis, 2014, 113 :133-147
[39]   Experimental and kinetic study of SO2 oxidation on a Pt/γ-Al2O3 catalyst [J].
Hamzehlouyan, Tayebeh ;
Sampara, Chaitanya ;
Li, Junhui ;
Kumar, Ashok ;
Epling, William .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2014, 152 :108-116
[40]   Kinetics of propane dehydrogenation over Pt-Sn/Al2O3 catalyst [J].
Li, Qing ;
Sui, Zhijun ;
Zhou, Xinggui ;
Chen, De .
APPLIED CATALYSIS A-GENERAL, 2011, 398 (1-2) :18-26