稻壳基活性炭催化剂的低温NH<sub>3</sub>-SCR抗硫性能

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Abstract A rice husk-derived activated carbon supported Mn-Ce catalyst (Mn-Ce/DAC) was prepared by an impregnation method and tested for the selective catalytic reduction of NO_x with NH₃. Such catalysts were characterized by N₂ adsorption, X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and temperature programmed desorption (TPR/TPD). The characterization results indicated that Mn-Ce/DAC catalyst exhibited the higher Ce³⁺/Ce⁴⁺ ratio, chemisorbed oxygen and Brønsted acid sites than commercial sawdust-derived activated carbon supported Mn-Ce catalyst (Mn-Ce/MAC). All of these factors played significant roles in the high SCR activity and SO₂ resistance. In situ DRIFTS results demonstrated that sulfate formation was suppressed on the surface of the DAC support, which might be the most significant reason that Mn-Ce/DAC maintained a high SCR activity in the presence of SO₂.

Key words： low-temperature SCR biomass activated carbon SO₂ resistance

Received: 10 April 2019

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X511

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	SHU Yun
	ZHANG Fan
	WANG Hong-chang
	SHI Ying-jie
	ZHU Jin-wei

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SHU Yun,ZHANG Fan,WANG Hong-chang等. Sulfur resistance of rice husk based activated carbon catalyst for the low-temperature selective catalytic reduction of NO by NH₃[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(11): 4620-4627.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I11/4620

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