The effect of various support materials on the catalytic activity of nickel in the low temperature steam reforming of methane
The effect support materials on the catalytic activity of Ni in the low temperature steam reforming of CH4 was studied using a fixed-bed quartz microreactor. The catalysis were prepared by loading Ni at 5% on y-Al2O3, SiO2, TiO2 and ZrO2 using both the wet and dry impregnation methods as applicable....
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| Main Authors: | , , |
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| Format: | text |
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Animo Repository
2006
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| Online Access: | https://animorepository.dlsu.edu.ph/faculty_research/8307 |
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| Institution: | De La Salle University |
| Summary: | The effect support materials on the catalytic activity of Ni in the low temperature steam reforming of CH4 was studied using a fixed-bed quartz microreactor. The catalysis were prepared by loading Ni at 5% on y-Al2O3, SiO2, TiO2 and ZrO2 using both the wet and dry impregnation methods as applicable. Ni/ZrO2 gave the highest % CH4 conversion and H2 yield (H2 /CH4 ) at 5000C which can be attributed to the high oxygen mobility in the ZrO2 support. Catalyst deactivation due to carbon deposition was most pronounced in Ni/SiO2 where % CH4 conversion dropped after several hours on stream. The silanol bonds that formed on the surface of SiO2 when in contact with steam are known to encourage carbon deposition. Ni/TiO2 performed at par with Ni/y-Al2O3 at 5000C in terms of percent % CH4 conversion in spite of its lower number of acid and basic sites. However, Ni/TiO2 did not perform well at higher temperatures which may be due to the phase transformations that could have occurred as the temperatures were raised. |
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