Ultra-high specific surface area spherical FePOx/SiO2 aerogel with excellent mechanical properties for the highly selective direct oxidation of CH4 to HCHO

Zhu, Kunmeng ; Gao, Fuwei ; Zhao, Zhiyang ; Ren, Jian ; Lasobras, Javier ; Shen, Xiaodong ; Cui, Sheng ; Menéndez, Miguel (Universidad de Zaragoza)

Resumen: Silica aerogels, characterized by their high porosity and substantial specific surface area, are suitable for applications as catalysts or catalyst supports. The simultaneous attainment of a substantial specific surface area and robust mechanical properties in aerogel materials remains a formidable challenge in material synthesis. Spherical FePOx/SiO2 aerogel materials were synthesized employing a combination of heating reflux, the sol-gel technique, and supercritical ethanol drying. These composites demonstrate an exceptional specific surface area, uniformly dispersed active components, shape controllability, and superior mechanical strength. A noteworthy enhancement in both specific surface area (1175 m2/g) and compressive modulus (7.56 MPa) surpasses many findings reported in extant literature. Under conditions of a reaction temperature at 650°C and a flow rate of 97.5 mL/min, the HCHO selectivity and yield for 4 wt.% FePOx/SiO2 aerogel were 18.3 and 4.2 times, respectively, higher than those of 4 wt.% FePOx/SiO2 particles. These composites manifest significant selectivity towards the direct catalytic oxidation of CH4 to HCHO.

Idioma: Inglés

DOI: 10.1016/j.jallcom.2023.172535

Año: 2023

Publicado en: JOURNAL OF ALLOYS AND COMPOUNDS (2023), 172535 [24 pp.]
ISSN: 0925-8388

Factor impacto JCR: 5.8 (2023)

Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 109 / 439 = 0.248 (2023) - Q1 - T1
Categ. JCR: METALLURGY & METALLURGICAL ENGINEERING rank: 8 / 90 = 0.089 (2023) - Q1 - T1
Categ. JCR: CHEMISTRY, PHYSICAL rank: 51 / 178 = 0.287 (2023) - Q2 - T1

Factor impacto CITESCORE: 11.1 - Metals and Alloys (Q1) - Materials Chemistry (Q1) - Mechanics of Materials (Q1) - Mechanical Engineering (Q1)

Factor impacto SCIMAGO: 1.103 - Materials Chemistry (Q1) - Metals and Alloys (Q1) - Mechanics of Materials (Q1) - Mechanical Engineering (Q1)

Financiación: info:eu-repo/grantAgreement/ES/MICINN/PID2019-106196RB-I00

Tipo y forma: Artículo (PostPrint)

Área (Departamento): Área Ingeniería Química (Dpto. Ing.Quím.Tecnol.Med.Amb.)