| Autor: |
Chen, Xiying, Yin, Liangtao, Long, Kaixian, Sun, Haiyang, Sun, Menghan, Wang, Huimin, Zhang, Qiulin, Ning, Ping |
| Předmět: |
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| Zdroj: |
Journal of the Energy Institute (Elsevier Science); Dec2020, Vol. 93 Issue 6, p2255-2263, 9p |
| Abstrakt: |
The improved Ni/SBA-15 catalysts were prepared by thermal inducing method and applied to dry reforming of methane. The promoting effect exerted by thermal activated reconstruction was studied systematically by means of various characterization techniques. TEM results indicated that the thermal inducing process led to the reconstruction of Ni particles to form ultra-fine Ni nanoparticles (2–3 nm) uniformly distributed on SBA-15. The resulting Ni nanoparticles not only improved catalytic activity but also inhibited the formation of carbon deposition during the DRM reaction. The thermal treatment catalyst with tiny particles presented the superior catalytic performance in the DRM reaction, where H 2 /CO ratio was close to 1 and no deactivation was discovered after continuous reaction at 750 °C for 50 h. Additionally, it was found that the metal-support interaction was strengthened observably after the thermal activated reconstruction. The strong interaction anchored Ni particles to prevent their high temperature sintering, thus forming stable catalytic centers. Therefore, the conversions of both CO 2 and CH 4 almost stabilized at 90% and 85%, respectively, for the thermal activated reconstruction samples during the long-term catalytic test. Image 1 • The T-Ni/SBA-15 catalyst exhibits excellent catalytic activity. • The reconstruction of Ni particles improved catalytic activity and inhibited the formation carbon deposition. • The metal-support interaction was significantly enhanced after the thermal activated reconstruction. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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