Carbon Aerogel-Supported Iron for Gasification Gas Cleaning: Tars Decomposition

Tar removal from gasification gases is a determinant step to guarantee the operational feasibility of gasification-to-chemicals/energy systems. However, this very complex process requiring catalytic materials proceed under reasonably low temperatures and convert tars into fuel (i.e., CHx). The use Fe-based catalysts for application has been reported before, however, there are still unsolved questions related its stability interaction with some species gases. Therefore, we evaluated carbon-supported Fe decomposition tar using simulated gases, toluene, naphthalene, benzene as models tar. effects temperature (565 < T 665 °C) co-feeding CO on activity were inspected at laboratory bench scales. decomposing was in following order: > toluene e naphthalene. Moreover, evidence validating reversible elemental toluene⇔benzene over surface. characterization spent evidenced oxidation active phase carbon deposition formation FexOy caused marked loss activity. Conversely, carbides stable decomposition.