2016
DOI: 10.1016/j.ces.2016.04.011
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A theoretical comparison of multifunctional catalyst for sorption-enhanced reforming process

Abstract: This work presents the first side-by-side comparison of the two leading multifunctional catalyst designs reported in the literature today for sorption-enhance reforming processes. Twodimensional unsteady-state models were developed to compare the performance of a core-shell multifunctional catalyst, consisting of a calcium-based sorbent core enclosed in a porous shell of methane steam reforming or water-gas shift catalyst, against an equivalent case of a uniformdistributed multifunctional design in which catal… Show more

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Cited by 35 publications
(11 citation statements)
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“…Under the assumption that production of component C is the objective, the yield of product C with respect to reactant A, Y CA , is employed to assess the pellet performance. Following [7], yield is defined as the ratio between the actual production rate of C and the consumption rate of A in the absence of internal and external transport resistances: Figure 5 reports the yield, Y CA , as a function of the pellet radius R p , calculated using Equation (6). Figure 5a shows the values of Y CA calculated from the solution presented in Figure 3.…”
Section: Parameter Value Unitmentioning
confidence: 99%
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“…Under the assumption that production of component C is the objective, the yield of product C with respect to reactant A, Y CA , is employed to assess the pellet performance. Following [7], yield is defined as the ratio between the actual production rate of C and the consumption rate of A in the absence of internal and external transport resistances: Figure 5 reports the yield, Y CA , as a function of the pellet radius R p , calculated using Equation (6). Figure 5a shows the values of Y CA calculated from the solution presented in Figure 3.…”
Section: Parameter Value Unitmentioning
confidence: 99%
“…However, the concept of structuring the functionalities at the pellet level has not been entirely examined yet. Integration of the catalytic and adsorptive functionalities has received recently significant attention [2,6]. Evaluation of the performance of bifunctional pellets integrating catalytic and adsorptive functions applied to the Claus process [2], water-gas shift reaction [2,6] and methane steam reforming [6] has revealed the great influence of the spatial arrangement of different functionalities within the pellet, with non-uniform distributions being very often superior over the uniform.…”
Section: Introductionmentioning
confidence: 99%
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“…Theoretical studies conclude that 98 having catalyst and chemisorption sites closer will improve mass transfer as well as, potentially maintain a relatively higher CO2 partial pressure for chemisorption. 18 In 100 principle, CO2 molecules would have shorter distance to travel to chemisorption sites at 101 or beneath the surface of the sorbent, resulting in faster reaction kinetics and lower residence times in the reactor. 19 Alkali metal ceramics, which in the context of this review refers to binary-metal oxides composed of at least a metal belonging to the alkali metal group of chemical elements, have been widely researched as alternative sorbents to CaO, due to their ability to trap CO2 as alkali metal carbonates under a wide range of temperatures.…”
Section: Introductionmentioning
confidence: 99%
“…multifunctional, catalyst pellets the presence of the adsorbent is intentional and is resulting from the production technology and their application (Dietrich et al, 2005;Grünewald and cpe.czasopisma.pan.pl; degruyter.com/view/j/cpe Agar, 2004;Lugo and Wilhite, 2016). Therefore taking into account the sorption of reagents in the dynamics of such objects is fully justified.…”
Section: Introductionmentioning
confidence: 99%