Hydrophilic or Hydrophobic? How Byproducts Change the Water Affinity of Fischer-Tropsch Catalysts.

ABSTRACT: The impact of reaction byproducts on the water wettability of Fischer-Tropsch catalysts has been investigated by using supported cobalt and ruthenium catalysts. Water contact angle measurements showed an evolution from 75° to 140° for a supported cobalt on titania catalyst due to catalytic operation, indicating that the catalyst changed from hydrophilic to almost superhydrophobic. MALDI-FT-ICR-MS studies revealed that the dewaxed spent catalyst contained long-chain carboxylates, in line with the presence of carboxylic acids with carbon numbers up to C₁₀₀ in the heavy wax. Using dedicated experiments with alumina, silica, and titania support materials, it was found that alcohols, carboxylic acids, and amines adhered so strongly to the surface that they could not be removed by Sox

SUBMITTER: Sengupta S 

PROVIDER: S-EPMC12648334 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature