CO2 reforming of glycerol over La-Ni/Al2O3 catalyst：A longevity evaluative study

• Published in: Journal of energy chemistry Vol. 24; no. 3; pp. 366 - 373
• Main Authors: Siew, Kah Weng, Lee, Hua Chyn, Khan, Maksudur R., Gimbun, Jolius, Cheng, Chin Kui
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.05.2015
• Subjects: Al2O3; BET比表面积; CO2; CO2 reforming; glycerol; lanthanum; longevity; syngas; 甘油; 重整; 镍/氧化铝催化剂; 镍催化剂; 长寿; syngas; longevity; CO2 reforming; lanthanum; glycerol
• ISSN: 2095-4956
• DOI: 10.1016/S2095-4956(15)60324-2

This paper reports on the longevity of glycerol-dry（CO2） reforming over the lanthanum（La） promoted Ni/Al2O3 catalysts.The XRD results showed that the Ni particle was well-dispersed in the presence of La promoter.In addition,via the NH3-TPD analysis,it was found that the La promoter has reduced the acidity of Ni catalyst which may have explained the mitigation of carbon laydown.It was determined that the 3.0 wt% La-promoted Ni/Al2O3 catalyst possessed the largest BET specific surface area of 97 m2 g-1.Consequently,it yielded the best catalytic longevity performance with conversion attained more than 90%,even after 72 h of reaction duration.Significantly,it can be confirmed that the presence of CO2 during the glycerol dry reforming was essential in reducing carbon deposition,most likely via gasification pathway.This has ensured a stability of catalytic activity for a long reaction period（72 h）.