An Eco-Friendly Fluidizable FexOy/CaO-γ-Al2O3 Catalyst for Tar Cracking during Biomass Gasification
| Autor: | Cindy Torres, Samira Rostom, Hugo de Lasa |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
020209 energy iron and calcium oxides over alumina tar reforming catalyst Biomass 02 engineering and technology lcsh:Chemical technology 7. Clean energy Catalysis lcsh:Chemistry chemistry.chemical_compound Specific surface area Biochar Pyridine 0202 electrical engineering electronic engineering information engineering lcsh:TP1-1185 Physical and Theoretical Chemistry Fourier transform infrared spectroscopy green catalyst biomass gasification Tar 021001 nanoscience & nanotechnology Cracking lcsh:QD1-999 Chemical engineering chemistry 13. Climate action 0210 nano-technology |
| Zdroj: | Catalysts Volume 10 Issue 7 Catalysts, Vol 10, Iss 806, p 806 (2020) |
| ISSN: | 2073-4344 |
| DOI: | 10.3390/catal10070806 |
| Popis: | The present study deals with the development, characterization, and performance evaluation of an eco-friendly catalyst, using 2-methoxy-4-methylphenol (2M4MP) as a surrogate tar. The 2M4MP was selected due to its chemical functionalities and the fact that it is a good model compound to represent the tar formed during biomass low temperature gasification. The eco-friendly catalyst was prepared using the typical Fe and Ca minerals which are present in ash. These ash components were added to a fluidizable &gamma Al2O3 support using a multistep incipient impregnation, yielding Fe oxides as an active phase and CaO as the promoter. The prepared catalyst displayed a 120 m2/g BET specific surface area, with few &gamma Al2O3 bulk phase changes, as observed with XRD. TPD-NH3 and pyridine FTIR allowed us to show the significant influence of CaO reduced support acidity. A TPR analysis provided evidence of catalyst stability during consecutive reduction&ndash oxidation cycles. Furthermore, catalyst evaluation vis-à vis catalytic steam 2M4MP gasification was performed using the fluidized CREC riser simulator. The obtained results confirm the high performance of the developed catalyst, with 2M4MP conversion being close to 100% and with selectivities of up to 98.6% for C1-C2 carbon-containing species, at 500 ° C, with a 7.5 s reaction time and 1.5 g steam/g 2M4MP. These high tar conversions are promising efficiency indicators for alumina catalysts doped with Fe and Ca. In addition, the used catalyst particles could be blended with biochar to provide an integrated solid supplement that could return valuable mineral supplements to the soil. |
| Databáze: | OpenAIRE |
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