Fight against climate change: atmospheric CO2 capture with nanofluids
|Contact: CARRIERE David, , firstname.lastname@example.org, +33 1 69 08 54 89|
One of the route the Intergovernmental Panel on Climate Change strongly encourages to capture atmospheric CO2 is the use of liquid amines, followed by recovery and deep underground storage. But the CO2 recovery step is currently too energy consuming. We aim at understanding how the addition of nanoparticles can meet a carbon-efficient recovery.
|Possibility of continuation in PhD: Oui|
|Deadline for application:28/05/2021 |
|Full description: |
The Intergovernmental Panel on Climate Change1 (IPCC) has reported that in order to mitigate climate change, we must capture c.a. 100 to 1000 GtCO2 in the coming century and reach carbon neutrality in 2050. One of the route IPCC strongly encourages is the capture of CO2 by liquid amines, followed by recovery and deep underground storage. But a single bottleneck currently makes the net CO2 capture ineffective: the CO2 recovery is carried out by heating and is too energy consuming.
In this context, we study how the addition of nanoparticles improves the CO2 recovery from liquid amines. These “nanofluids” have an acknowledged improved efficiency, but there is little indication on how to reach a suitable composition, and no consensus on the mechanism. Our goal is to replace the current trial-and-error approaches with rational guidelines to find the best nanoparticle + liquid amine combination.
The aim of this internship is to prove / disprove that CO2 recovery is well-described by models of bubble heterogeneous nucleation. It requires: i) making the dispersions of nanoparticles in the liquid amines, and assessing in situ their size(s), dispersion state and active surface area by X-ray scattering ii) measuring the bubble nucleation rate with a custom-made setup iii) confront the experimental results to nucleation models.
|Technics/methods used during the internship: |
X-ray scattering, optical microscopy, nucleation theories
|Tutor of the internship |