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Statements

Subject Item
n2:RIV%2F67985858%3A_____%2F14%3A00437381%21RIV15-GA0-67985858
rdf:type
n15:Vysledek skos:Concept
dcterms:description
The chloridization rates of sodium hydrogen carbonate calcines were determined using both a differential fixed-bed reactor and an integral fixed-bed, flow-through reactor at ambient pressure and a temperature of 500 degrees C. In the course of the reaction with hydrogen chloride gas, monoclinic or hexagonal Na2CO3 was transformed into cubic NaCl. The expansion of the volume of the solid phase, because of the reaction, was described by means of a simple structural model. The reacted solids remained quite porous (similar to 29%), having decreased from an initial porosity of 45%. Up to advanced stages of the reaction, the rate-decaying behavior of the chloridization reaction can be approximated by first-order kinetics as a function of either the solids conversion or the elapsed time of reaction. The reaction between hydrogen chloride gas and the Na2CO3-based sorbents is rapid, and a high degree of sorbent utilization can be attained. The unsteady-state sorption of hydrogen chloride gas in a column packed with reactant solids can be described by a pair of partial differential equations, and their analytical, closed-form solution is presented in terms of three dimensionless variables. Unsteady-state experimental runs were carried out in a small integral fixed-bed reactor (14 mm i.d.) with spherical alumina particles having an average diameter of 1.5 mm, impregnated with NaHCO3 and packed to a depth of 6.5 cm. The effective reaction rate constants inferred from the experimental breakthrough curves in accordance with the model were found to be in reasonable agreement with those determined from the experiments executed in the differential mode of reaction. The presented, tractable expressions can readily serve as a rational basis for the conceptual design and effective operation of packed-bed reactors for the deep removal of hydrogen chloride gas from hot producer gas. The chloridization rates of sodium hydrogen carbonate calcines were determined using both a differential fixed-bed reactor and an integral fixed-bed, flow-through reactor at ambient pressure and a temperature of 500 degrees C. In the course of the reaction with hydrogen chloride gas, monoclinic or hexagonal Na2CO3 was transformed into cubic NaCl. The expansion of the volume of the solid phase, because of the reaction, was described by means of a simple structural model. The reacted solids remained quite porous (similar to 29%), having decreased from an initial porosity of 45%. Up to advanced stages of the reaction, the rate-decaying behavior of the chloridization reaction can be approximated by first-order kinetics as a function of either the solids conversion or the elapsed time of reaction. The reaction between hydrogen chloride gas and the Na2CO3-based sorbents is rapid, and a high degree of sorbent utilization can be attained. The unsteady-state sorption of hydrogen chloride gas in a column packed with reactant solids can be described by a pair of partial differential equations, and their analytical, closed-form solution is presented in terms of three dimensionless variables. Unsteady-state experimental runs were carried out in a small integral fixed-bed reactor (14 mm i.d.) with spherical alumina particles having an average diameter of 1.5 mm, impregnated with NaHCO3 and packed to a depth of 6.5 cm. The effective reaction rate constants inferred from the experimental breakthrough curves in accordance with the model were found to be in reasonable agreement with those determined from the experiments executed in the differential mode of reaction. The presented, tractable expressions can readily serve as a rational basis for the conceptual design and effective operation of packed-bed reactors for the deep removal of hydrogen chloride gas from hot producer gas.
dcterms:title
Reaction of Hydrogen Chloride Gas with Sodium Carbonate and Its Deep Removal in a Fixed-Bed Reactor Reaction of Hydrogen Chloride Gas with Sodium Carbonate and Its Deep Removal in a Fixed-Bed Reactor
skos:prefLabel
Reaction of Hydrogen Chloride Gas with Sodium Carbonate and Its Deep Removal in a Fixed-Bed Reactor Reaction of Hydrogen Chloride Gas with Sodium Carbonate and Its Deep Removal in a Fixed-Bed Reactor
skos:notation
RIV/67985858:_____/14:00437381!RIV15-GA0-67985858
n3:aktivita
n10:P n10:I
n3:aktivity
I, P(GC14-09692J)
n3:cisloPeriodika
49
n3:dodaniDat
n9:2015
n3:domaciTvurceVysledku
n4:2423251 n4:2553473 n4:1894137 n4:1866834
n3:druhVysledku
n11:J
n3:duvernostUdaju
n7:S
n3:entitaPredkladatele
n17:predkladatel
n3:idSjednocenehoVysledku
41422
n3:idVysledku
RIV/67985858:_____/14:00437381
n3:jazykVysledku
n12:eng
n3:klicovaSlova
hot fuel gas purification; hydrogen chloride gas; active sodium carbonate
n3:klicoveSlovo
n6:hydrogen%20chloride%20gas n6:active%20sodium%20carbonate n6:hot%20fuel%20gas%20purification
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[9A18754D909F]
n3:nazevZdroje
Industrial and Engineering Chemistry Research
n3:obor
n16:CI
n3:pocetDomacichTvurcuVysledku
4
n3:pocetTvurcuVysledku
5
n3:projekt
n18:GC14-09692J
n3:rokUplatneniVysledku
n9:2014
n3:svazekPeriodika
53
n3:tvurceVysledku
Pohořelý, Michael Svoboda, Karel Chen, Po-Ch. Šyc, Michal Hartman, Miloslav
n3:wos
000346322200058
s:issn
0888-5885
s:numberOfPages
14
n13:doi
10.1021/ie503480k