Pyrolysis is a very potential sludge treatment technology that is low-cost and environmentally friendly; particularly, the pyrolysis sewage sludge char (SC) can be used as a catalyst support To improve the NO conversion efficiency of sludge char based catalysts, they were activated by potassium hydroxide and phosphoric acid, respectively. The catalysts of activated sludge char with or without Mn-Ce impregnation in the application of NO removal by low-temperature SCR were investigated. The higher NO conversion efficiency of sludge char based Mn-Ce catalysts at low temperature were obtained. Compared with the 59% NO conversion efficiency of Mn-Ce/SC catalyst, the conversion efficiency of catalyst supported on KOH activated char (SCK) achieved 89% at 220 °C and of catalyst supported on H3PO4 activated char (SCP) reached 87% at 240 °C. The catalysts were analytically characterized using N2 adsorption-desorption, XRD, FTIR, NH3-TPD and XPS measurements. The higher specific area, excellent dispersion of Mn-CeOx and more Brønsted acid sites are responsible for the higher NO conversion efficiency of Mn-Ce/SCK, while the higher NO conversion efficiency of Mn-Ce/SCP is enhanced by more Brensted acid sites, oxygen-containing and some unique phosphorus-containing oxygen functional groups. It indicates that sludge char activated by KOH and H3PO4 is a potential low-temperature catalyst support.

中文翻译：

---

用 KOH 和 H3PO4 活化的污水污泥炭负载 Mn-Ce 氧化物催化剂提高低温 NH3-SCR 催化活性

热解是一种极具潜力的污泥处理技术，成本低且环保；特别是，热解污水污泥炭 (SC) 可用作催化剂载体 为了提高污泥炭基催化剂的 NO 转化效率，它们分别被氢氧化钾和磷酸活化。研究了含或不含Mn-Ce浸渍的活性污泥炭催化剂在低温SCR脱除NO中的应用。污泥炭基Mn-Ce催化剂在低温下NO转化效率更高。与 Mn-Ce/SC 催化剂 59% 的 NO 转化效率相比，KOH 活性炭（SCK）负载的催化剂在 220°C 时的转化效率达到了 89%，H3PO4 活性炭（SCP）负载的催化剂的转化效率达到了 87%在 240°C。使用 N2 吸附-解吸、XRD、FTIR、NH3-TPD 和 XPS 测量对催化剂进行分析表征。更高的比表面积、Mn-CeOx 的优异分散性和更多的布朗斯台德酸位是 Mn-Ce/SCK 较高的 NO 转化效率的原因，而更多的布伦斯德酸位提高了 Mn-Ce/SCP 的较高的 NO 转化效率，含氧和一些独特的含磷氧官能团。这表明 KOH 和 H3PO4 活化的污泥炭是一种潜在的低温催化剂载体。Mn-Ce/SCP 更高的 NO 转化效率通过更多的布伦斯特酸位点、含氧和一些独特的含磷氧官能团增强。这表明 KOH 和 H3PO4 活化的污泥炭是一种潜在的低温催化剂载体。Mn-Ce/SCP 更高的 NO 转化效率通过更多的布伦斯特酸位点、含氧和一些独特的含磷氧官能团增强。这表明 KOH 和 H3PO4 活化的污泥炭是一种潜在的低温催化剂载体。