Modeling of CaCO3 decomposition under CO2/H2O atmosphere in calcium looping processes

Impact of atmospheric water vapor on the thermal decomposition of calcium hydroxide: a universal kinetic approach to a physico-geometrical consecutive reaction in solid–gas systems under different partial pressures of product gas

“…By introducing the accommodation function, the Arrhenius plot for the IP process is modified as the plot of S3(b), ESI †) compared to the observations made from the conventional Arrhenius plot ( Fig. S3(a), ESI †) appeared to be due to corrections in the overall rate, which have been determined according to the accommodation function in eqn (10). However, the modified Arrhenius plots under various p(H 2 O) conditions indicated that there were different linear correlations with different slopes (Fig.…”

“…Reduction of the rate equation for the overall process, which is controlled by the elementary step i = 4, to eqn (14) requires the assumption that the value of K 1 K 2 K 3 K 5 1/n is much larger or smaller than unity. The overall rate expressed by eqn (14) is influenced by the relative value of p(H 2 O) with reference to P eq (T) in the form of the conventional accommodation function in eqn (10). An alternative form of the accommodation function may be derived from the rate equation in eqn (15), in which the overall rate depends on the product of two p(H 2 O) components, which are composed of the reciprocal of the n th powered p(H 2 O) and the n th powered relative value of p(H 2 O) with reference to P eq (T), respectively.…”

“…This type of behavior is a generally observed phenomenon for reactions in solid-gas systems. [1][2][3][4][5][6][7][8][9][10][11] At the same time, different phenomena have also been observed through the effect of atmospheric gas on the reaction rates. The Smith-Topley effect details an exotic phenomenon observed for the thermal dehydration of inorganic hydrates.…”

Universal Kinetic Description for Thermal Decomposition of Copper(II) Hydroxide over Different Water Vapor Pressures

“…The AF, a(p(C(g)),P eq (T)), is a function of p(C(g)) and the equilibrium pressure P eq (T) of reversible thermal decomposition. Among the various functional forms of the AF proposed in previous studies, [6][7][8][36][37][38][39][40][41][42][43][44][45][46] the form expressed by eq 2 is the most widely used to account for the impact of p(C(g)) on the overall reaction rate: 6,7,42,46 C g , = 1 −…”

Natural Calcium‐Based Sorbents Doped with Sea Salt for Cyclic CO2 Capture

“…Various materials, such as, lithium silicate , magnesium oxide , sodium or potassium bicarbonate , , calcium oxide , ionic liquids , carbon dioxide binding organic liquids , , and mixed‐matrix membranes , have been proposed to scrub CO 2 on a large scale. Calcium‐looping , technology has received widespread attention as one of the most promising methods to capture CO 2 during coal gasification processes, sorption‐enhanced stream processes (SESRs), and large‐scale post‐combustion CO 2 ‐capture processes. Calcium oxide (CaO)‐based sorbents have ample resources throughout the world, and possess a relatively large theoretical absorption capacity.…”