Hydrothermal stability of MTT zeolite in hot water: The role of La and Ce

• Hydrothermal stability of MTT zeolite in hot water under autogenous pressure was studied at 473 K.
• Effect lanthanum and cerium on the hydrothermal properties of MTT zeolite were also studied.
• Parent MTT zeolite, as well Ce and La modified zeolites showed remarkable stability in hot water.
• Ce-MTT was more stable than La-MTT in hot water environment.

Stability of catalysts under steam and hot water environment is a crucial issue in upgrading of water-containing feedstocks such as biomass and heavy oil. The hydrothermal stability of MTT zeolite in hot water under autogenous pressure was investigated at 473 K. The effect lanthanum (La) and cerium (Ce) on the hydrothermal behavior of MTT zeolite were also studied under the same condition. The parent MTT zeolite, as well Ce and La modified zeolites showed remarkable stability in hot water. Minimal losses in textural properties originated from the hydrolysis of Si–O–Si and Si–O–Al bonds in the zeolite framework. The study shows the potential of the MTT zeolite as a catalyst for biomass conversion and heavy oil upgrading.

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