The microstructure of hydrogen sulphide flames

Levy, A.; Merryman, E.L.

doi:10.1016/0010-2180(65)90089-1

Cited by 41 publications

(16 citation statements)

References 7 publications

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“…Even though the reaction channel (1a) was suggested in this study to be the most preferable route, the experimental results and the simulations did not indicate definite evidences and there leaves the possibility of the other routes in reaction (1). In order to investigate the main reaction channel theoretically, potential energies of the reaction (1) were examined by ab initio calculations with Gaussian 92 and 94 programs [44,45].…”

Section: Discussionmentioning

confidence: 98%

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Studies on the oxidation mechanism of H2S based on direct examination of the key reactions

Tsuchiya

Kamiya

Matsui

1997

Int. J. Chem. Kinet.

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numbers of studies were performed until very recently on the fundamental oxidation reaction mechanism of hydrogen sulfide and related H 9 S 9 O reaction systems.The oxidation process of H 2 S (and some times the catalytic effect of SO 2 ) have been investigated in several flame studies [1 -5], and the reaction mechanisms were discussed based on the measured product distributions. These studies have provided much useful information on the elementary reactions of H 9 S 9 O systems, however, it is generally very difficult to judge the reliability of kinetic/thermodynamic parameters of individual elementary reactions proposed in these indirect studies. It is also noted that even a conventional shock tube study was not performed for clarifying oxidation mechanism of H 2 S (as far as we know), except an ignition delay mea- INTRODUCTIONThe oxidation of hydrogen sulfide in combustion of fossil fuels and the consecutive atmospheric processes of sulfur oxides are creating serious pollution problems on a global scale.Many practical studies for reducing SO x in combustion systems have been conducted from the engineering point of view. In contrast, only very limited (1), the rate constants evaluated by numerical simulations are summarized as; k 1 ϭ 3.1 ϫ 10 Ϫ11 exp[Ϫ 75 kJ mol Ϫ1 /RT ] cm 3 molecule Ϫ1 s Ϫ1 (T ϭ 1400 -1850 K) with an uncertainty factor of about 2. Direct measurements of the rate constants for S ϩ O2 : SO ϩ O (2), and SO ϩ O 2 : SO 2 ϩ O (3) yield k 2 ϭ (2.5 Ϯ 0.6) ϫ 10 Ϫ11 exp[Ϫ(15.3 Ϯ 2.5) kJ mol Ϫ1 /RT ] cm 3 molecule Ϫ1 s Ϫ1 (T ϭ 980 -1610 K) and, k 3 ϭ (1.7 Ϯ 0.9) ϫ 10 Ϫ12 exp[Ϫ(34 Ϯ 11) kJ mol Ϫ1 /RT ] cm 3 molecule Ϫ1 s Ϫ1 (T ϭ 1130 -1640 K), respectively. By summarizing these data together with the recent experimental results on the H 9 S 9 O reaction systems, a new kinetic model for the H 2 S oxidation process is constructed. It is found that this simple reaction scheme is consistent with the experimental result on the induction time of SO 2 formation obtained by Bradley and Dobson.

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Section: Discussionmentioning

confidence: 98%

“…To construct a reasonable reaction scheme, however, addition of kinetic measurement for the unexplored elementary reaction, HS ϩ O 2 9: products (1) seems to be very important in the chain-branching step, and also reexamination of the other key reactions S( 3 P) ϩ O 2 9: SO ϩ O( 3 P) (2) and SO ϩ O 2 9: SO 2 ϩ O( 3 P)…”

Section: Introductionmentioning

confidence: 99%

Studies on the oxidation mechanism of H2S based on direct examination of the key reactions

Tsuchiya

Kamiya

Matsui

1997

Int. J. Chem. Kinet.

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“…To understand the reactions taking place during H 2 S combustion, detailed and skeletal H 2 S reaction mechanisms (Frenklach et al, 1981;Hawboldt et al, 2000;Leeds University Sulphur Mechanism, 2005;Sander et al, 2010;Zhou et al, 2013) have been developed, and several experimental studies in laminar premixed flames have been conducted (Levy and Merryman, 1965;Levy and Merryman" 1967;Merryman and Levy, 1972). The reactions of hydrocarbons, CO and CO 2 with S-containing species leading to the formation of COS and CS 2 are present in the literature, and their formation is also considered while designing sulfur recovery units (Gargurevich, 2005;.…”

Section: Introductionmentioning

confidence: 99%

Formation of polycyclic aromatic hydrocarbons in Claus process from contaminants in H2S feed gas

Mohammed

Raj

Shoaibi

et al. 2015

Chemical Engineering Science

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“…This equation illustrates the nature of equilibrium limitations involved in the Claus process; decreasing the process temperature can increase the equilibrium constant and thus increase conversion, but the lower limit of this temperature and hence the upper limit of equilibrium conversion is set by the condensation temperature of sulfur [3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Modeling and simulation of condensed sulfur in catalytic beds of CLAUS process: rapid estimation

Abedini

Salooki

Ghasemian

2010

Chem. Eng. Res. Bull.

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Abstract:The Claus process has been known and used in the industry for over 100 years. It involves thermal oxidation of hydrogen sulfide and its reaction with sulfur dioxide to form sulfur and water vapor. This process is equilibrium-limited and usually achieves efficiencies in the range of 94-97%, which have been regarded as acceptable in the past years. First bed operates at the temperature of 573 K, second and third beds operate at 523K and 473K. Outlet of each bed enters the condenser. Operating temperature of each condenser is about 413K which sulfur condenses in them. In this study catalytic bed process of sulfur recovery unit has been mathematically modeled and simulated using MATLAB , and then output conditions of compounds has been calculated.

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The microstructure of hydrogen sulphide flames

Cited by 41 publications

References 7 publications

Studies on the oxidation mechanism of H2S based on direct examination of the key reactions

Studies on the oxidation mechanism of H2S based on direct examination of the key reactions

Formation of polycyclic aromatic hydrocarbons in Claus process from contaminants in H2S feed gas

Modeling and simulation of condensed sulfur in catalytic beds of CLAUS process: rapid estimation

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