Mahadi, Bahari and Nguyen, Trinh Duy and Singh, Sharanjit and Siang, Tan Ji and Nor Shafiqah, Mohd Nasir and Jun, Lau N. and Phuong, Pham T. T. and Nurul Aini, Razali and Vo, Dai-Viet N. (2018) Catalytic performance of Yttrium-doped Co/Mesoporous Alumina Catalysts for Methane Dry Reforming. In: International Conference on Environment 2018 (ICENV2018) , 11-13 December 2018 , Batu Ferringhi Penang, Malaysia. pp. 1-10.. (Unpublished)
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Abstract
A series of mesoporous alumina (MA) supported cobalt-based catalysts with different yttrium promoter (0-5 wt.%) loading was synthesized by sequential incipient wetness impregnation (SIWI) approach and extensively investigated for methane dry reforming (MDR) reaction. The characterization results confirmed the formation of Co 3 O 4 and CoAl 2 O 4 phases on both fresh 10%Co/MA and 3%Y 10%Co/MA catalysts. Interestingly, the average crystallite size of Co 3 O 4 was reduced by 1.63% for yttrium-doped catalyst due to dilution effect which suppresses Co 3 O 4 agglomeration. It was also found that the yttrium promoter facilitated superior metal-support interaction compared to unpromoted catalyst. The catalyst with 3 wt.% of yttrium loading exhibited the highest catalytic conversion for CH 4 and CO 2 of about 85.8% and 90.5%, respectively. This improved activity can be ascribed to excellent cobalt dispersion and stronger metal-support interaction in the presence of Y 2 O 3 promoter. Irrespective of the catalyst, the carbon nanofilaments and graphitic carbon were detected on the surface of all the used catalyst, but the quantity of deposited carbon was comparatively smaller for Y 2 O 3 promoted catalyst. This was possibly due to its high oxygen mobility attributes, which enables rapid rate of carbon removal compared to carbon deposition on the surface of catalyst.
| Item Type: | Conference or Workshop Item (Lecture) |
|---|---|
| Uncontrolled Keywords: | Mesoporous alumina; Y 2 O 3 ; Co/MA catalyst; Syngas; Methane dry reforming |
| Subjects: | T Technology > TP Chemical technology |
| Faculty/Division: | Faculty of Chemical & Natural Resources Engineering Institute of Postgraduate Studies |
| Depositing User: | Mrs. Neng Sury Sulaiman |
| Date Deposited: | 22 Feb 2019 07:26 |
| Last Modified: | 03 Oct 2019 07:44 |
| URI: | http://umpir.ump.edu.my/id/eprint/23458 |
| Download Statistic: | View Download Statistics |
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