Production of C from CO2 in a two-step solar process utilizing FeO and Fe3O4

Palumbo, Robert; Larson, Carol

doi:10.1016/0360-5442(90)90053-5

Cited by 10 publications

(10 citation statements)

References 6 publications

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“…For these reasons, we proposed a process by which C(gr) could be extracted from CO 2 using high-temperature solar energy. 3 In this earlier study, we demonstrated that CO 2 theoretically could be thermally decomposed to C(gr) and O 2 in a two-step thermochemical solar process with the following scheme where 0 < y < 0.1:…”

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confidence: 94%

“…The ∆G°and ∆H°of the first reaction are negative between 300 and 800 K. 3 Furthermore, ∆G remains negative even at 600 K for CO 2 pressures below 1 × 10 -4 atm. Reaction 2 is endothermic and its ∆G°equals 0 near 2200 K. 3 Thus, the sum of the two reactions gives C(gr) and O 2 from CO 2 , for which the energy source can be sunlight. Furthermore, an availability analysis of the proposed process shows that its maximum efficiencies could be as high as 62%.…”

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confidence: 99%

“…Furthermore, an availability analysis of the proposed process shows that its maximum efficiencies could be as high as 62%. 3 Beyond this theoretical justification for the idea, there exists support for it in a growing experimental and technological data base. Reaction 2 was successfully effected in concentrating solar furnaces.…”

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confidence: 99%

“…Thus, CO 2 recycling and utilization seems to be a fundamental task from both an ecological and economical point of view. For these reasons, we proposed a process by which C(gr) could be extracted from CO 2 using high-temperature solar energy …”

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confidence: 99%

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Production of Carbon from Carbon Dioxide with Iron Oxides and High-Temperature Solar Energy

Ehrensberger

Palumbo

Larson

et al. 1997

Ind. Eng. Chem. Res.

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We demonstrate from both a theoretical and experimental point of view that CO2 can be thermally reduced to carbon with concentrated solar energy. The concept involves reactions between CO2 and iron oxides. Thus, we experimentally studied the thermochemical reactivity of iron oxides for splitting CO2 into C(gr) and O2 using high-temperature powder X-ray diffraction, gas chromatography, and mass spectrometry. Emphasis was given to the dependence of the gaseous and solid reaction products on the structural change of wustite (Fe1-y O). The CO2 decomposition occurs in two steps at temperatures near 773 K: First wustite reacts with CO2 to form CO and magnetite (Fe3O4); then CO disproportionates to C(gr) and CO2. Fe3O4 can be recycled to Fe1-y O by thermal dissociation above 2200 K using highly concentrated solar radiation as the only energy source for process heat.

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confidence: 94%

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Production of Carbon from Carbon Dioxide with Iron Oxides and High-Temperature Solar Energy

Ehrensberger

Palumbo

Larson

et al. 1997

Ind. Eng. Chem. Res.

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“…of CO 2 was proposed as early as 1980 [45] but targeted at that time to producing carbon rather than CO as a source for hydrocarbon fuels. Thermodynamic analysis showed that CO may be thermally decomposed to C and O 2 in a two-step reaction scheme like the above that involves the use of FeO and Fe 3 O 4 [46]. Mn(II)-bearing ferrites (Mn x Fe 3À x O 4 ) were employed experimentally for the decomposition of CO 2 to carbon at 573 K [47].…”

Section: Feedstocksmentioning

confidence: 99%