Combined promoting effects of low-Pd-containing and Cu-doped LaCoO3 perovskite supported on cordierite for the catalytic combustion of benzene.
The catalytic activities for benzene oxidation and resistance to SO2 poisoning were tested for a series of Pd/La-Cu-Co-O/cordierite catalysts, which were prepared using a multiple-step impregnation method. The XRD, SEM, and IR characterization techniques were performed to investigate the relationship between the catalytic performance and its physicochemical properties. When Pd/La-Cu-Co-O/cordierite catalysts with Pd loadings of 0.06 and 0.08 % were prepared at a calcination temperature of 500 °C for 5 h, they exhibited similar catalytic activity and sulfur resistance. When the concentration of benzene was 1500 ppm and the GHSV was 20000 h(-1), the benzene conversion was above 95 % at a reaction temperature of 350 °C in SO2 existing at 100 ppm. These results were mainly attributed to the cooperation between La-Cu-Co-O perovskite and the noble metal Pd. Specifically, the addition of copper can strengthen the catalytic activity of La-Co-O/cordierite catalysts by decreasing the crystalline size of the active ingredients. A moderate Pd addition can drastically improve the sulfur resistance and further improve the catalytic activity of the La-Cu-Co-O/cordierite catalyst.
State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, 210009, China. ywchen@njtech.edu.cn.|College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, 210009, China. ywchen@njtech.edu.cn.
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YW
Chen
State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, 210009, China.|College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, 210009, China.
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B
Li
State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, 210009, China.|College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, 210009, China.
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Niu
State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, 210009, China.|College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, 210009, China.
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Li
State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, 210009, China.|College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, 210009, China.
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Kan
State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, 210009, China.|College of Materials Science and Engineering, Nanjing Tech University, Nanjing, 210009, China.
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Zhu
State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, 210009, China.|College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, 210009, China.
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Shen
D000393:Air Pollutants / Q000737:chemistry*; D000397:Air Pollution / Q000517:prevention & control*; D001554:Benzene / Q000737:chemistry*; D017610:Calcium Compounds / Q000737:chemistry; D002516:Ceramics / Q000737:chemistry; D017745:Incineration / Q000379:methods*; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry; D013458:Sulfur Dioxide / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry
D000393:Air Pollutants; D017610:Calcium Compounds; D010087:Oxides; D013458:Sulfur Dioxide; C059910:perovskite; C055335:cordierite; D014025:Titanium; D001554:Benzene
Catalytic activity; Catalytic combustion; Pd/La-Cu-Co-O/cordierite; Perovskite; Sulfur poisoning