CO2 splitting in an aerosol flow reactor via the two-step Zn/ZnO solar thermochemical cycle

Loutzenhiser, Peter G.; Gálvez, María Elena; Hischier, Illias; Graf, Aron; Steinfeld, Aldo

doi:10.1016/j.ces.2009.11.025

Cited by 46 publications

(28 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although thermodynamically favorable, no C is formed. 1,20,23 Figure 3 shows the temporal variation of X Zn-to-ZnO for: (a) 67 wt % Zn reacting with 25, 50, and 75% CO 2 -Ar and 100% CO 2 ( Figure 3a) and (b) 100% CO 2 reacting with 67, 75, and 100 wt % Zn (Figure 3b), including an additional run with 2000 mg of Zn. The time response of the reactor was equal to $3 min, which accounts for varying CO 2 and CO sums over the first few minutes of experimentation.…”

Section: Zn-to-zno Conversionsmentioning

confidence: 98%

“…The reaction of CO 2 with Zn was also studied in an aerosol flow reactor designed for in situ quench of Zn vapor below the saturation temperature to form nanoparticles. 23 Correspondence concerning this article should be addressed to A. Steinfeld at aldo.steinfeld@ethz.ch. This offered high Zn-to-ZnO conversions over short residence times (e.g., up to 88% over 3 s) due to augmented reaction kinetics and heat/mass transfer.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

CO₂ reduction with Zn particles in a packed‐bed reactor

Loutzenhiser¹,

Barthel²,

Stamatiou³

et al. 2010

AIChE Journal

Self Cite

View full text Add to dashboard Cite

A two-step solar thermochemical cycle for splitting CO 2 with Zn/ZnO redox reactions is considered, consisting of: (1) the endothermic dissociation of ZnO with concentrated solar radiation as the heat source and (2) the non-solar, exothermic, reduction of CO 2 to CO by oxidizing Zn to ZnO; the latter is recycled to the first step. The second step of the cycle is investigated using a packed-bed reactor where micron-sized Zn particles were immobilized in mixtures with submicron-sized ZnO particles. Experimental runs were performed for Zn mass fractions in the range 67-100 wt % and CO 2 concentration in the range 25-100%, yielding Zn-to-ZnO conversions up to 71% because of sintering prevention, as corroborated by SEM analysis.

show abstract

Section: Zn-to-zno Conversionsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

CO₂ reduction with Zn particles in a packed‐bed reactor

Loutzenhiser¹,

Barthel²,

Stamatiou³

et al. 2010

AIChE Journal

Self Cite

View full text Add to dashboard Cite

show abstract

“…Recent studies demonstrate that the two-step thermochemical cycles with ZnO/Zn and Iron oxides can also be used for solar thermal carbon dioxide splitting [86][87][88] as well as for syngas production [75]. In principle, the same reactor configurations can be used for carbon dioxide splitting [86,89,90].…”

Section: Possible Reactor Configurationsmentioning

confidence: 99%

Functioning devices for solar to fuel conversion

Mul¹,

Schacht²,

Swaaij³

et al. 2012

Chemical Engineering and Processing: Process Intensification

View full text Add to dashboard Cite

a b s t r a c tThis paper provides a perspective on the technologies capable of converting solar energy, CO 2 and H 2 O into an easy to use fuel. The paper addresses bio-based approaches, but mainly focuses on (i) the combination of photovoltaic (PV) devices and electrocatalysis, (ii) single unit operation by photocatalytic conversion, and (iii) solar thermal conversion. Each option is described in a general manner, including a brief evaluation of the advantages and disadvantages. Also suggestions for future research endeavours are given. Based on the used literature data, for electrocatalytic and photocatalytic technologies, dramatic improvements should be made in material optimization, as well as reactor design and operation. Large efficiency gains are necessary to enable use of these technologies in practice. Solar thermal conversion is more mature, and requires specific optimization in processing, as will be discussed.

show abstract

“…Several chemical aspects of the thermal dissociation of ZnO have been investigated (Palumbo et al, 1998). Work originally focused mostly on the application of this cycle for WS and hydrogen generation, but investigations into CDS have come into play (Galvez, Frei, Albisetti, Lunardi, & Steinfeld, 2008;Loutzenhiser, Elena Galvez, Hischier, Graf, & Steinfeld, 2010;Steinfeld, 2002).…”

Section: The Zn/zno Cyclementioning

confidence: 99%