Catalytic Conversion of Synthesis Gas to Olefins and Alcohols in the Presence of Fe/C Catalysts

Sustainable Aviation Fuel from Syngas through Higher Alcohols

“…[33] It was stated that strong initial deactivation is due to carburization when Co 2 C is formed. Analogously to [31] a stable operation was observed for syngas transformation over CoCu/KIT-6 after 24 h time-on-stream with very low amounts of CO 2 formed (Table 1, entry 12). [2] A slight catalyst deactivation occurred for 8Co/(MnAl) catalyst at 260 °C under 5 MPa and gas hourly space velocity of 5000 h À 1 during 200 h time-on-stream.…”

“…It was, however, reported that the lower threshold pressure to suppress methanation is 3 MPa, above which higher alcohols selectivity was slightly enhanced. CO 2 formation was also increased at higher CO conversion levels for lower H 2 /CO ratios [31] . On the other hand, the highest selectivity to higher alcohols was obtained under the lowest pressure over Cu 4 Fe 1 Mg 4 catalyst in [31] .…”

“…CO 2 formation was also increased at higher CO conversion levels for lower H 2 /CO ratios. [31] On the other hand, the highest selectivity to higher alcohols was obtained under the lowest pressure over Cu 4 Fe 1 Mg 4 catalyst in. [31] Interestingly, higher selectivity to alcohols was found for CoMn/CuZnAlZr catalyst upon increasing pressure, while lower selectivity to olefins is easily explained by their hydrogenation to alkanes (Figure 17).…”

“…[31] On the other hand, the highest selectivity to higher alcohols was obtained under the lowest pressure over Cu 4 Fe 1 Mg 4 catalyst in. [31] Interestingly, higher selectivity to alcohols was found for CoMn/CuZnAlZr catalyst upon increasing pressure, while lower selectivity to olefins is easily explained by their hydrogenation to alkanes (Figure 17). [37] Selectivity to higher alcohols increased from 46 % to 57 % when increasing pressure from 1 MPa to 4 MPa, respectively at 290 °C with H 2 /CO ratio of 1 for RhK/ Mo 2 C. [47] It was, however, stated that although Mo 2 C based catalyst requires high pressures, a relatively high alcohol selectivity was achieved already below 1 MPa.…”

“…Transformation of syngas to higher alcohols is currently under intensive research [2,4,5,23–57] and several reviews have been published rather recently covering the nature of active centers„ [1,54] and more specifically performance of Fe/Co catalysts and Co carbide nanocatalysts [59] . A simplified reaction scheme for syngas transformation over a bifunctional catalyst is shown in Figure 1 [40] .…”