A comparison of structure–activity of Cu-modified over different mesoporous silica supports for catalytic conversion of levulinic acid
| Autor: | Balla Putrakumar, Karthikeyan Rajan, Tong Xiang Liang, Ginjupalli Srinivasarao, Mitta Harishekar, Keiski Riitta, Seelam Prem Kumar |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
0106 biological sciences
Environmental Engineering Renewable Energy Sustainability and the Environment 020209 energy Drop (liquid) chemistry.chemical_element 02 engineering and technology Mesoporous silica 01 natural sciences Copper Catalysis gamma-Valerolactone chemistry.chemical_compound Chemical engineering chemistry 010608 biotechnology 0202 electrical engineering electronic engineering information engineering Levulinic acid Dispersion (chemistry) Selectivity Waste Management and Disposal |
| Popis: | Catalytic hydrogenation of levulinic acid (LA) to γ-valerolactone (GVL) was investigated over four different types of mesoporous silica (SBA-15, MCM-48, MCM-41, and KIT-6) supported copper (5 wt.%) catalysts. The Cu was incorporated into mesoporous silica supports by a sequential impregnation method. A detailed investigation of the support structure-activity correlation was done and the performance of the catalysts in LA conversion was studied. Detailed characterisation techniques were used to evaluate the physical and catalytic properties of the studied catalysts. The structure type and physicochemical properties of the silica support had a significant effect on the overall performance of the catalysts. Among them, over Cu/SBA-15 catalyst, a complete levulinic acid (LA) conversion with 98% gamma valerolactone (GVL) selectivity was achieved at 265°C under ambient H2 pressure. The superior performance of Cu/SBA-15 catalyst was due to the high surface acidity, reducibility of Cu oxides species, and highly dispersed Cu particles over SBA-15 structure. The results confirmed that the activity of the catalysts is significantly affected by the textural properties, surface acidity and copper dispersion. Durability of all the catalysts were tested for 50 h time on stream and over the SBA-15 catalyst, only a small drop in the activity was observed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|