Stabilizing the active phase of iron-based Fischer–Tropsch catalysts for lower olefins: mechanism and strategy

Abstract

An iron carbonyl-mediated Ostwald-ripening-like growth mechanism of an FexCy active phase in Fischer–Tropsch synthesis is firstly revealed by in situ mass-spectrometric and theoretical analysis.

Synthesis of Iron-Carbide Nanoparticles: Identification of the Active Phase and Mechanism of Fe-Based Fischer–Tropsch Synthesis

“…[16][17][18][19][20][21][22] Metallic iron, [23][24] and various phases of iron carbides had all been claimed to be active. 4,6,[25][26][27][28][29][30][31][32][33][34][35][36][37][38] The complication for FTS comes also from the complexity of the reaction network itself, 4 h before it was cooled down to room temperature. The product was washed with ethanol and hexane, and collected for further characterization.…”

Synthesis of Light Hydrocarbons from Biogas and Hydrogen: Investigation of a Fe‐Mn‐K/MgO Catalyst

“…In recent years, the FTS of light alkenes/olefins, in particular, has been an intensively discussed topic, as they are particularly interesting as basic chemicals for the chemical industry [9,10].…”

Role of surface frustrated Lewis pairs on reduced CeO2(110) in direct conversion of syngas

“…Several indirect processes for converting syngas to light olefins have been developed and even commercialized, such as the methanol to olefins (MTO) process, but still have drawbacks of high equipment cost and high energy consumption due to the use of multiple steps in the process [1,3,4]. Recently, the direct Fischer-Tropsch to olefins (FTO) process using Fe-or Co-based cat-alysts has attracted significant interest [5][6][7][8]. However, due to the Anderson-Schulz-Flory (ASF) limit in Fischer-Tropsch synthesis, the maximum selectivity of C2-C4 olefins cannot exceed 60% [7,8].…”