Synthesis of ordered meso/macroporous H sub(3)PW sub(12)O sub(40)/SiO sub(2) and its catalytic performance in oxidative desulfurization

• Published in: RSC advances Vol. 6; no. 59; pp. 53860 - 53866
• Main Authors: Yang, Peng, Zhou, Shiyu, Du, Yue, Li, Junsheng, Lei, Jiaheng
• Format: Journal Article
• Language: English
• Published: 01.06.2016
• Subjects: Cages; Catalysis; Catalysts; Desulfurizing; Performance enhancement; Silicon dioxide; Synthesis; Walls
• ISSN: 2046-2069
• DOI: 10.1039/c6ra09154g

Hierarchically ordered meso/macroporous phosphotungstic acid/SiO sub(2) (HPW/SiO sub(2)) catalysts have been synthesized viathe dual-templating method and used as a catalyst for oxidative desulfurization. The as-synthesized catalysts possess ordered macropores and well-ordered hexagonal mesopores within the walls of the macroporous cages. The HPW active species are finely dispersed in the silica matrix and retain its Keggin structure. Meso/macroporous HPW/SiO sub(2) catalysts show superior catalytic performance with obvious improvement of the desulfurization rate compared to mesoporous HPW/SiO sub(2) and macroporous HPW/SiO sub(2). The high performance of the catalyst should be attributed to the structural characteristics of the meso/macropores. Furthermore, the catalyst was recovered and reused for seven runs with only a slight decrease in the catalytic performance.