Conversion of syngas to light olefins over silicalite-1 supported iron and cobalt catalysts: Effect of manganese addition

Promotion Effects in Co‐Based Fischer—Tropsch Catalysis

“…4.1.4.2 Supported Co-Mn Fischer-Tropsch Catalysts. F-T synthesis of lower hydrocarbons on silicalite-1 supported Co and Co-Mn catalysts was reported by Das et al 110,119 Co 3 O 4 was found to be the only phase present in Mn-free catalysts after calcination, while the addition of Mn favored the formation of a mixed spinel structure of the type (Co 1Àx Mn x ) 3 O 4 . They considered that the addition of Mn decreased the reduction temperature of Co 3 O 4 and presumably its particle size.…”

Stabilization of iron by manganese promoters in uniform bimetallic FeMn Fischer–Tropsch model catalysts prepared from colloidal nanoparticles

“…The addition of Mn modifies the dispersion of nanoparticles and decreases its crystallite size. 25 The diameter of 9-nm Fe particles decreases to 7nm in Figure 3e for Fe 9 Mn 1 and 5nm in Figure 3f for the Fe 5 Mn 5 sample. As can be seen in the insets of Figure 3d- Catalyst response to gas treatment…”

CO Hydrogenation to Light Alkenes Over Mn/Fe Catalysts Prepared by Coprecipitation and Sol-gel Methods

“…As a conventional promoter, manganese has been widely used in many catalysts for Fischer-Tropsch synthesis (FTS) [3][4][5][6], and most researchers agreed that the addition of manganese could modify the iron catalysts to improve the selectivity of light alkenes in the products [7][8][9][10]. In our previous work [9], the promotion effect of manganese on the selectivity to light alkenes has been studied over impregnated iron catalysts supported on silicate-2, and it was found that the manganese could prohibit the secondary hydrogenation of C 2 H 4 and C 3 H 6 .…”