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Sulfonic-functionalized SBA-15 as an active catalyst for the gas-phase dehydration of glycerol
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Orientador(es)
Resumo(s)
Sulfonic-functionalized mesoporous silicas (SBA-15) were used as catalysts in the
gas-phase dehydration of glycerol at moderate temperature (275 and 300 ºC). For the
tested conditions all the samples show a very high catalytic activity. At the lowest
temperature and for 140 h on stream a nearly constant selectivity to acrolein of ca.
80 % could be obtained. Both the pore size and density of acid sites play an important
role in the deactivation rate and selectivity: larger pore size may extend significantly
the catalytic activity and high density of acid sites may reduce acrolein production.
Increasing the temperature to 300 ºC is beneficial to the acrolein production, but it
also leads to an increase of the deactivation rate.
Descrição
Palavras-chave
Catalytic activity Acid sites
Contexto Educativo
Citação
Lourenço, J. P.; Macedo, Maria I.; Fernandes, Auguste. Sulfonic-functionalized SBA-15 as an active catalyst for the gas-phase dehydration of glycerol. Catalysis Communications, 19, 105-109, 2012.