Size Control of Iron Oxide Nanoparticles Using Reverse Microemulsion Method: Morphology, Reduction, and Catalytic Activity in CO Hydrogenation

Table 4

Catalysts activity and products selectivity after 35 h time-on-stream.

HLB	X^aCO	HC^b	O/P^c	α ^d	CO2 (%)^e	Products selectivity
						CH4	C2–C4	C5–C12	C12+
40	67.2	21.3	1.1	0.83	31.3	13.7	41.7	35.0	9.6
31.2	71.5	22.2	1.0	0.8	32.2	14.6	47.6	31.5	6.3
23.7	75.2	22.8	1.0	0.78	33.1	15.6	53.2	27.4	3.8
13.9	77.5	23.5	0.9	0.75	34.5	17.6	57.5	22.8	2.1

Reaction conditions: 563 K, 1.7 Mpa, and H₂/CO = 1 and space velocity = 4.9 nl · h⁻¹ · g_Fe⁻¹.
^aCarbon monoxide conversion (mol%).
^bHydrocarbon production, gCH₂/gFe/s (×10⁵), and CH₄ free.
^cOlefin to paraffin ratio.
^dChain growth probability.
^eCO₂ selectivity: selectivity to oxygenates was negligible (<2.0%) in all cases.