Chongqing Key Laboratory of Chemical Process for Clean Energy and Resource Utilization, College of Chemistry and Chemical Engineering (Chongqing), Chongqing University, Chongqing, 400044, China.
Environ Sci Pollut Res Int. 2017 Sep;24(27):21761-21769. doi: 10.1007/s11356-017-9622-0. Epub 2017 Aug 1.
Black rock series (BRS) is of great potential for their plenty of valued oxides which include vanadium, iron, alumina and silica oxides, etc. BRS was used for directly preparing of selective catalytic reduction (SCR) catalyst by modifying its surface texture with SiO-TiO sols and regulating its catalytic active constituents with VO and MoO. Consequently, 90% NO removal ratio was obtained within 300-400 °C over the BRS-based catalyst. The structure and properties of the BRS-based catalyst were characterized by the techniques of N adsorption-desorption, X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), H-temperature programmed reduction (H-TPR), and NH-temperature programmed desorption (NH-TPD). The results revealed that the BRS-based catalyst possesses favorable properties for NO removal, including highly dispersed active components, abundant surface-adsorbed oxygen O, well redox property, and numerous Brønsted acid sites. Particularly, the BRS-based catalyst exhibited considerable anti-poisoning performance compared with commercial TiO-based catalyst. The former catalyst shows a NO conversion surpassing 80% from 300 to 400 °C for potassium poisoning, and a durability of SO and HO exceeding 85% at temperatures from 300 to 450 °C.
黑硅石系列（BRS）因其富含多种有价值的氧化物而具有巨大的潜力，其中包括钒、铁、氧化铝和氧化硅等。BRS 可通过用 SiO-TiO 溶胶修饰其表面纹理并用 VO 和 MoO 调节其催化活性成分，直接用于制备选择性催化还原（SCR）催化剂。结果，在基于 BRS 的催化剂上，在 300-400°C 范围内即可获得 90%的 NO 去除率。通过 N 吸附-解吸、X 射线衍射（XRD）、拉曼光谱、X 射线光电子能谱（XPS）、H-程序升温还原（H-TPR）和 NH-程序升温脱附（NH-TPD）等技术对基于 BRS 的催化剂的结构和性能进行了表征。结果表明，基于 BRS 的催化剂具有良好的 NO 去除性能，包括高度分散的活性组分、丰富的表面吸附氧 O、良好的氧化还原性能和大量的 Brønsted 酸位。特别是，与商业 TiO 基催化剂相比，基于 BRS 的催化剂表现出相当的抗中毒性能。前者催化剂在钾中毒时，从 300°C 到 400°C 的 NO 转化率超过 80%，在 300°C 到 450°C 的温度下，SO 和 HO 的耐久性超过 85%。
