Full-Scale CO<sub>2</sub>Freezer Project Developments for Mars Atmospheric Acquisition

Meier, Anne; Grashik, Martin; Shah, Malay; Sass, Jared; Bayliss, J.; Hintze, Paul E.; Carro, Rodolphe

doi:10.2514/6.2018-5172

Cited by 2 publications

(1 citation statement)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…By reducing CO 2 to CO, an essential component of synthesis gas, using available solar-to-fuels technology, , society can achieve feasible production of a variety of energy-dense chemicals including hydrocarbons, alcohols, and dimethyl ether. − This technique would also prove beneficial for NASA’s mission to extend mankind’s jurisdiction to Mars. The atmospheric processing module (APM) is designed to cryogenically capture CO 2 (∼95% of the Martian atmosphere) prior to CH 4 propellant formation through the Sabatier reaction. − CO 2 conversion to CO would permit downstream storable liquid fuel production using excess carbon that is otherwise wasted; i.e., CH 4 is emitted to achieve the desired O 2 :CH 4 fuel ratio. , Worlds powered by carbon neutral (or zero) energy sources have the potential to sustain high standards for clean and efficient energy.…”

Section: Introductionmentioning

confidence: 99%

CO₂ Conversion Performance of Perovskite Oxides Designed with Abundant Metals

Hare

Maiti

Meier

et al. 2019

Ind. Eng. Chem. Res.

Self Cite

View full text Add to dashboard Cite

With improved technology, CO 2 could be the feedstock for production of renewable fuels. The reverse water−gas shift chemical looping (RWGS-CL) process performs at lower temperatures and higher energy efficiencies than rival methods. Ideal materials must endure reaction conditions, exhibit high activity, and be synthesized from readily available elements. Design and characterization of La x Ca 1−x Fe y Mn 1−y O 3 perovskite-type oxides resulted in higher CO yields and peak formation rates than previously witnessed in RWGS-CL. Extents of Ca-/Fe-doping presented strong effects on lattice stability (XRD), conversion temperatures, and CO formation (TPO-CO 2 ). Samples calcined at higher temperatures exhibited greater stability and activity but higher conversion temperatures. Vacancy formation energies (DFT) decreased significantly and slightly with increasing Ca and Fe content, respectively, to reflect experimental findings. Surface allocation of metals suggests Fe is redistributed to the surface (XPS) for intensified CO 2 conversion with Mn-rich bulk for enhanced oxygen storage capacity and intralattice diffusion.

show abstract