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Reaction and Transport Effects in the Heterogeneous Systems for Lean Gas Purification.

SYSNO ASEP	0471819
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Reaction and Transport Effects in the Heterogeneous Systems for Lean Gas Purification.
Author(s)	Hartman, Miloslav (UCHP-M)_{RID, ORCID, SAI} Svoboda, Karel (UCHP-M)_{RID, ORCID, SAI} Pohořelý, Michael (UCHP-M)_{RID, ORCID, SAI} Šyc, Michal (UCHP-M)_{RID, SAI, ORCID} Skoblia, S. (CZ) Chyou, Y.-P. (TW)
Source Title	Chemical Papers. - : Springer - ISSN 0366-6352 Roč. 71, č. 3 (2017), s. 563-577
Number of pages	15 s.
Language	eng - English
Country	SK - Slovakia
Keywords	differential reactor ; gas chemisorption ; alkaline solids
Subject RIV	CI - Industrial Chemistry, Chemical Engineering
OECD category	Environmental sciences (social aspects to be 5.7)
R&D Projects	GC14-09692J GA ČR - Czech Science Foundation (CSF)
Institutional support	UCHP-M - RVO:67985858
UT WOS	000394523800004
EID SCOPUS	85006165266
DOI	10.1007/s11696-016-0038-y
Annotation	Sorption of hydrogen chloride gas by active soda and that of hydrogen sulfide gas by calcium oxide are explored by experiment as promising means of removing these detrimental contaminants from fuel gas: active Na2CO3 was prepared by the calcination of commercial NaHCO3 at 200 °C; reactive CaO was formed by decomposing a fine-grained, high-calcium limestone at 830 °C. Techniques with a differential reactor were employed to explore the rate of reaction of HCl with Na2CO3 at 500 °C and that of H2S with CaO at 800 °C. Time-resolved data on the sorbents' conversion were collected as a function of mean particle size in the range between 0.285 and 1.12 mm. The surface reaction constants, deduced via the tractable model from the initial reaction rates of the two reactions, slightly increase with the increasing particle size. The proposed correlations enable to interpolate or cautiously extrapolate to other isotropic, irregularly shaped solids. The effective diffusivities educed by means of the model from the experimental curves decrease significantly with the increasing conversion and are affected by the particle size in both sorptions. The developed reaction rate equations can conveniently be applied to the design and simulation of the deep dechloridization and the bulk desulfurization of hot producer gas.
Workplace	Institute of Chemical Process Fundamentals
Contact	Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227
Year of Publishing	2017

Number of the records: 1