Calcium looping reactor design for fluidized-bed systems

Diego, M.E.; Martínez, Isabel Casabona; Alonso, Mònica; Arias, B.; Abanades, J.C.

doi:10.1016/b978-0-85709-243-4.00006-9

Cited by 3 publications

(2 citation statements)

References 67 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For each of the reaction mechanisms, theoretical Z(α) master plot curves (Equation 25) can be plotted using the approximate algebraic functions in Table 1 for f (α) and g(α), as shown in Figure 9. A plot of experimental values can be produced with Equation (29). The experimental values will provide a good fit for the theoretical curve with the same mechanism.…”

Section: Master Plotsmentioning

confidence: 99%

Kinetics of Solid-Gas Reactions and Their Application to Carbonate Looping Systems

2019

View full text Add to dashboard Cite

Reaction kinetics is an important field of study in chemical engineering to translate laboratory-scale studies to large-scale reactor conditions. The procedures used to determine kinetic parameters (activation energy, pre-exponential factor and the reaction model) include model-fitting, model-free and generalized methods, which have been extensively used in published literature to model solid-gas reactions. A comprehensive review of kinetic analysis methods will be presented using the example of carbonate looping, an important process applied to thermochemical energy storage and carbon capture technologies. The kinetic parameters obtained by different methods for both the calcination and carbonation reactions are compared. The experimental conditions, material properties and the kinetic method are found to strongly influence the kinetic parameters and recommendations are provided for the analysis of both reactions. Of the methods, isoconversional techniques are encouraged to arrive at non-mechanistic parameters for calcination, while for carbonation, material characterization is recommended before choosing a specific kinetic analysis method.

show abstract

Section: Master Plotsmentioning

confidence: 99%

Kinetics of Solid-Gas Reactions and Their Application to Carbonate Looping Systems

2019

View full text Add to dashboard Cite

show abstract

“…(ii) The make-up flow that remains in the system also participates in the SO 2 capture process and, therefore, leaves the system with a CaSO 4 content equal to that of the solids within the system. This is the result of considering the Calcium looping system as a perfectly mixed reactor with regards to the CaSO 4 content of the particles, which has been shown to be a sufficiently accurate representation due to the low F S /N Ca,total ratio which results in a slow sulphation of the inventory of solids in the system (Diego et al, 2015).…”

Section: Resultsmentioning

confidence: 99%

Evolution of the CO2 carrying capacity of CaO particles in a large calcium looping pilot plant

Diego

Arias

Abanades

2017

International Journal of Greenhouse Gas Control

View full text Add to dashboard Cite

Ambient weathering of magnesium oxide for CO2 removal from air

et al. 2020

View full text Add to dashboard Cite

To avoid dangerous climate change, new technologies must remove billions of tonnes of CO 2 from the atmosphere every year by mid-century. Here we detail a land-based enhanced weathering cycle utilizing magnesite (MgCO 3) feedstock to repeatedly capture CO 2 from the atmosphere. In this process, MgCO 3 is calcined, producing caustic magnesia (MgO) and high-purity CO 2. This MgO is spread over land to carbonate for a year by reacting with atmospheric CO 2. The carbonate minerals are then recollected and re-calcined. The reproduced MgO is spread over land to carbonate again. We show this process could cost approximately $46-159 tCO 2 −1 net removed from the atmosphere, considering grid and solar electricity without post-processing costs. This technology may achieve lower costs than projections for more extensively engineered Direct Air Capture methods. It has the scalable potential to remove at least 2-3 GtCO 2 year −1 , and may make a meaningful contribution to mitigating climate change.

show abstract

Calcium looping reactor design for fluidized-bed systems

Cited by 3 publications

References 67 publications

Kinetics of Solid-Gas Reactions and Their Application to Carbonate Looping Systems

Kinetics of Solid-Gas Reactions and Their Application to Carbonate Looping Systems

Evolution of the CO2 carrying capacity of CaO particles in a large calcium looping pilot plant

Ambient weathering of magnesium oxide for CO2 removal from air

Contact Info

Product

Resources

About