Potassium modified NaY: A selective and durable catalyst for dehydration of lactic acid to acrylic acid

Potassium modification significantly improved the selectivity and durability of NaY zeolites during lactic acid dehydration reaction. The selectivity of 2.8K/NaY zeolites improved from 14.8% to 50.0% over NaY catalyst. Adding potassium also prolonged catalyst life. After 22 h the acrylic acid select...

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Bibliographic Details
Published in:Catalysis communications 2009-04, Vol.10 (9), p.1345-1349
Main Authors: Sun, Peng, Yu, Dinghua, Fu, Kaimei, Gu, Mingyan, Wang, Yang, Huang, He, Ying, Hanjie
Format: Article
Language:English
Subjects:
Dehydration
Durability
Lactic acid
NaY
Potassium
Selectivity
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Summary:Potassium modification significantly improved the selectivity and durability of NaY zeolites during lactic acid dehydration reaction. The selectivity of 2.8K/NaY zeolites improved from 14.8% to 50.0% over NaY catalyst. Adding potassium also prolonged catalyst life. After 22 h the acrylic acid selectivity of NaY zeolites reduced to less than 10.0% while that of 3.5K/NaY retained 35.6%. Characterizations with NH 3-TPD, CO 2-TPD, N 2 adsorption and thermal analysis techniques revealed that the enhancement of catalytic performances could be attributed to the tuned acidity/basicity and the potassium electronic promoter effect.
ISSN:1566-7367
1873-3905
DOI:10.1016/j.catcom.2009.02.019