Kinetic Study of the Pyrolysis of H<sub>2</sub>S

Binoist, Manuel; Labegorre, Bernard; Monnet, Franck; Clark, Peter D.; Dowling, Norman I.; Huang, Mingbin; Archambault, Damien; Plasari, Edouard; Marquaire, Paul-Marie

doi:10.1021/ie021012r

Cited by 84 publications

(60 citation statements)

References 20 publications

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“…Importantly, reaction (2) is also thermodynamically unfavourable. The thermal decomposition of H 2 S can only occur with temperatures above 1073 K. 45,46 As a result, reactions (2) and (3) can only occur when treatment temperatures are higher than 1073 K. This is due to H 2 produced from reaction (2). Therefore, when treatment temperatures are lower than 973 K, only reaction (1) occurs.…”

Section: Structure and Morphology Of Zns Nanocrystalsmentioning

confidence: 99%

Visible emission characteristics from different defects of ZnS nanocrystals

Wang

Shi

Feng

et al. 2011

Phys. Chem. Chem. Phys.

166

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Various sized ZnS nanocrystals were prepared by treatment under H 2 S atmosphere. Resonance Raman spectra indicate that the electron-phonon coupling increases with increasing the size of ZnS. Surface and interfacial defects are formed during the treatment processes. Blue, green and orange emissions are observed for these ZnS. The blue emission (430 nm) from ZnS without treatment is attributed to surface states. ZnS sintered at 873 K displays orange luminescence (620 nm) while ZnS treated at 1173 K shows green emission (515 nm). The green luminescence is assigned to the electron transfer from sulfur vacancies to interstitial sulfur states, and the orange emission is caused by the recombination between interstitial zinc states and zinc vacancies. The lifetimes of the orange emission are much slower than that of the green luminescence and sensitively dependent on the treatment temperature. Controlling defect formation makes ZnS a potential material for photoelectrical applications.

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Section: Structure and Morphology Of Zns Nanocrystalsmentioning

confidence: 99%

Visible emission characteristics from different defects of ZnS nanocrystals

Wang

Shi

Feng

et al. 2011

Phys. Chem. Chem. Phys.

166

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“…Its thermal stage promotes the conversion of H 2 S into elemental sulfur by a controlled oxidation at high temperatures (900-1500°C). This process involves several reactions such as oxidation [36] and pyrolysis of H 2 S [37]. The overall global reaction:…”

Section: The Acid Gas To Syngas Tm (Ag2s Tm ) Technologymentioning

confidence: 99%

Acid Gas to Syngas (AG2S™) technology applied to solid fuel gasification: Cutting H2S and CO2 emissions by improving syngas production

Bassani

Pirola

Maggio³

et al. 2016

Applied Energy

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“…The pyrolysis of H 2 S has been the subject of a number of experimental (e.g., [43,55]) and modeling (e.g., [50,52]) studies. Compared to the experimental data of Hawboldt et al [43] (targets 6-7), H 2 S conversion predicted by the basic mechanism tends to be too slow for most temperatures (see Fig.…”

Section: Optimization Targetsmentioning

confidence: 99%

Chemical kinetics mechanism for oxy-fuel combustion of mixtures of hydrogen sulfide and methane

Bongartz

Ghoniem

2015

Combustion and Flame

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Oxy-fuel combustion of sour gas, a mixture of natural gas (essentially methane (CH 4 )), carbon dioxide (CO 2 ), and hydrogen sulfide (H 2 S), could enable the utilization of large natural gas resources, especially when combined with enhanced oil recovery. In this work, a detailed chemical reaction mechanism for oxy-fuel combustion of sour gas is presented. To construct the mechanism, a CH 4 sub-mechanism was chosen based on a comparative validation study for oxy-fuel combustion. This mechanism was combined with a mechanism for H 2 S oxidation, and the sulfur sub-mechanism was then optimized to give better agreement with relevant experiments. The optimization targets included predictions for the laminar burning velocity, ignition delay time, and pyrolysis of H 2 S, and H 2 S oxidation in a flow reactor. The rate parameters of 15 sulfur reactions were varied in the optimization within their respective uncertainties. The optimized combined mechanism was validated against a larger set of experimental data over a wide range of conditions for oxidation of H 2 S and interactions between carbon and sulfur species. Improved overall agreement was achieved through the optimization and all important trends were captured in the modeling results. The optimized mechanism can be used to make qualitative and some quantitative predictions on the combustion behavior of sour gas. The remaining discrepancies highlight the current uncertainties in sulfur chemistry and underline the need for more accurate direct determination of several important rate constants as well as more validation data.

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Kinetic Study of the Pyrolysis of H₂S

Cited by 84 publications

References 20 publications

Visible emission characteristics from different defects of ZnS nanocrystals

Visible emission characteristics from different defects of ZnS nanocrystals

Acid Gas to Syngas (AG2S™) technology applied to solid fuel gasification: Cutting H2S and CO2 emissions by improving syngas production

Chemical kinetics mechanism for oxy-fuel combustion of mixtures of hydrogen sulfide and methane

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Kinetic Study of the Pyrolysis of H2S

Cited by 84 publications

References 20 publications

Visible emission characteristics from different defects of ZnS nanocrystals

Visible emission characteristics from different defects of ZnS nanocrystals

Acid Gas to Syngas (AG2S™) technology applied to solid fuel gasification: Cutting H2S and CO2 emissions by improving syngas production

Chemical kinetics mechanism for oxy-fuel combustion of mixtures of hydrogen sulfide and methane

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Kinetic Study of the Pyrolysis of H₂S