Abstract
The Prins reaction between propene and formaldehyde was studied over H-BEA, H-FAU, H-MFI and H-MOR zeolites at 150 °C in liquid phase. It was found that the H-BEA sample is the most active and selective toward buta-1,3-diene; the H-MFI is a potential catalyst for 3-buten-1-ol synthesis, while H-FAU can be used for 4-methyl-1,3-dioxane production. It had been confirmed that zeolite textural and acidic properties influence catalyst behaviour: the acidic properties influence sample activity, while product distribution is controlled by pore volume and effective pore diameter. The sample’s deactivation process had been studied and the kinetic model of deactivation was proposed. It was shown that the deactivation rate for the H-MFI catalyst is four times greater than for the H-BEA catalyst, probably because its strong/weak acid sites ratio is much more high than for the H-BEA.
Highlights
Buta-1,3-diene is one of the most important petrochemical products
It was found that the H-BEA sample is the most active and selective toward buta-1,3-diene; the H-MFI is a potential catalyst for 3-buten-1-ol synthesis, while H-FAU can be used for 4-methyl-1,3-dioxane production
It should be noted that weak acid sites are dominant for H-BEA and H-MOR, while H-MFI and H-FAU had a significant amount of the strong acid sites
Summary
Buta-1,3-diene is one of the most important petrochemical products. Its annual worldwide production is approximately 14.5 million tons and growing [1]. The naphtha stream cracking, which is a basic industrial process for buta-1,3-diene production has a relatively low buta-1,3-diene yield [3,4,5] and is unable to meet the growing market demand [3]. The Prins reaction looks like a promising approach for target industrial production of various diene hydrocarbons. It can use bio-based olefins as a feed, obtained from bioderived syngas and carbon dioxide through methanol and dimethyl, ether via MTO and DTO processes; aldehyde component of the reaction can be produced from methanol or extracted from pyrolysis bio-oils [4,5,6,7]. It has been shown that heterogeneous acidic materials, especially zeolites, can be used as catalysts in the Prins reaction for the production of dienes and unsaturated alcohols [8,9,10,11,12,13]
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