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A Numerical Study on the Effect of Temperature and Composition on the Flammability of Methane–Hydrogen Sulfide Mixtures

Published on Sep 2, 2019in Combustion Science and Technology1.564
· DOI :10.1080/00102202.2018.1564746
Gianmaria Pio5
Estimated H-index: 5
(UNIBO: University of Bologna),
Daniela Barba5
Estimated H-index: 5
(UNISA: University of Salerno)
+ 1 AuthorsErnesto Salzano27
Estimated H-index: 27
(UNIBO: University of Bologna)
Abstract
ABSTRACTThe growing demand of natural gas inspires existing and new projects in topographical areas where the hydrocarbon extraction meets severe safety challenges due to the presence of hydrogen s...
  • References (52)
  • Citations (1)
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References52
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#1María U. Alzueta (University of Zaragoza)H-Index: 31
#2Ricardo Pernía (University of Zaragoza)H-Index: 1
Last. Rafael Bilbao (University of Zaragoza)H-Index: 37
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Abstract The use of non-conventional fuel sources, such as shale gas, brings new research requisites for its proper use in an environmental friendly manner. In this context, shale gas may include different sulphur containing compounds, such as methanethiol, that is also formed as intermediate during sulphur containing residues processing. The present work includes an experimental and kinetic modelling study of the oxidation of methanethiol, CH3SH, in a quartz flow tubular reactor at atmospheric ...
2 CitationsSource
#1Gianmaria Pio (UNIBO: University of Bologna)H-Index: 5
#2Ernesto Salzano (UNIBO: University of Bologna)H-Index: 27
Abstract Natural gas represents an attractive fuel for industrialized and developing countries seeking an alternative to petroleum. Due to economic and safety considerations, liquefied natural gas (LNG) at cryogenic conditions is preferred for storage and transportation. The main drawback is the poor understanding of the physical and chemical phenomena that occur at the storage conditions of liquid methane, i.e. at ultra-low temperatures around 110 K and, if released, at temperatures below ambie...
7 CitationsSource
#1Nadia Sebbar (KIT: Karlsruhe Institute of Technology)H-Index: 10
#2Joseph W. Bozzelli (NJIT: New Jersey Institute of Technology)H-Index: 38
Last. Dimosthenis Trimis (KIT: Karlsruhe Institute of Technology)H-Index: 22
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ABSTRACTSeveral chemical reactions related to the oxidation and combustion of sulfur are investigated using a number of computational chemistry methods with the objective of determining appropriate methods for use in developing an elementary reaction mechanism for oxidation of sulfur. Calculations are focused on thermochemical properties and reaction energetics for reactive species and transition state structures for reactions in the oxidation/combustion of sulfur. Reactions involving several in...
1 CitationsSource
#1Xinhong Li (China University of Petroleum)H-Index: 5
#2Guoming Chen (China University of Petroleum)H-Index: 11
Last. Changhang Xu (China University of Petroleum)H-Index: 7
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Abstract This paper presents a comprehensive simulation and assessment of gas dispersion above sea from a subsea release using a Computational Fluid Dynamics (CFD) approach. A 3D CFD model is established to evaluate the behavior of flammable gas above sea, and a jack-up drilling platform is included to illustrate the effect of flammable gas cloud on surface vessels. The simulations include a matrix of scenarios for different surface release rates, distances between surface gas pool and offshore ...
1 CitationsSource
#1J.M. Colom-Díaz (University of Zaragoza)H-Index: 2
#2María Abián (University of Zaragoza)H-Index: 11
Last. María U. Alzueta (University of Zaragoza)H-Index: 31
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Abstract Oxidation of H2S at atmospheric pressure has been studied under different reaction atmospheres, varying the air excess ratio (λ) from reducing (λ = 0.32) to oxidizing conditions (λ = 19.46). The experiments have been carried out in a tubular flow reactor, in the 700-1400 K temperature range. The concentrations of H2S, SO2 and H2 have been determined and the experimental results have been simulated with a detailed chemical mechanism compiled in the present work. The experimental results ...
4 CitationsSource
#1Clayton R. Mulvihill (A&M: Texas A&M University)H-Index: 4
#2Charles Keesee (A&M: Texas A&M University)H-Index: 5
Last. Eric L. Petersen (A&M: Texas A&M University)H-Index: 37
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Abstract Hydrogen sulfide (H 2 S) composes up to 30% of certain natural-gas resources (“sour gas”) and can considerably alter combustion properties of methane (CH 4 ), but few data on H 2 S/CH 4 are available in the literature. In this work, new shock-tube and laminar flame speed data were obtained to facilitate future model validation. For the shock-tube experiments, a fuel-lean (φ = 0.5) 30/70 H 2 S/CH 4 blend in 99% argon by volume was shock-heated to temperatures between 1538 and 2144 K and ...
6 CitationsSource
#1Brian S. Haynes (USYD: University of Sydney)H-Index: 36
Abstract This paper reviews the opportunities and challenges for combustion research directed towards the production of valuable chemicals. In the main, the production of heat and power are not considered here – the primary focus is on processes in which the desired products are the combustion products themselves, or products that are created by virtue of reaction in a combustion environment. The processes considered comprise three main classes: (1) Direct flame processes, including acetylene pr...
6 CitationsSource
#1Katherine E. Kerr (UNT: University of North Texas)H-Index: 3
#2Yide Gao (UNT: University of North Texas)H-Index: 9
Last. Paul Marshall (UNT: University of North Texas)H-Index: 27
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Abstract Pulsed laser photolysis at 193 nm of NH3/CS2 mixtures in an Ar bath gas combined with resonance fluorescence detection of atomic H yielded the rate constant for H + CS2 over 295–490 K. The reaction was found to be pressure dependent and in the fall-off region or near the low pressure limit. Fitting to the Troe formalism yielded k0 = 7.5 × 10−24 (T/300 K)−14.76 exp(−5180 K/T) cm6 molecule−2 s−1 over 295–490 K. At 490 K equilibration of adduct formation was observed which yielded a H-SCS ...
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#1Ernesto Salzano (UNIBO: University of Bologna)H-Index: 27
#2Gianmaria Pio (UNIBO: University of Bologna)H-Index: 5
Last. Vincenzo Palma (UNISA: University of Salerno)H-Index: 25
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Abstract The effect of a hydrogen addition to the combustion chemistry of light alkanes was evaluated by the experimental and numerical determination of the laminar burning velocity of methane/propane/hydrogen mixtures in air at different equivalence ratios and fuel compositions by using a heat flux burner. The experimental results have been compared with additional data selected for the main experimental rig commonly adopted in current literature. The obtained set of data was used for the valid...
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#1Gianmaria Pio (UNIBO: University of Bologna)H-Index: 5
#2Ernesto Salzano (UNIBO: University of Bologna)H-Index: 27
Abstract The use of liquefied natural gas (LNG) is constantly growing. However, safety issues regarding cryogenic storage and transportation systems are still to be fully resolved. In particular, the evaluation of the efficiency of inerting systems for low-temperature LNG vapour is essential. In this work, the variation of the flammability range (in terms of lower and upper flammability limits and minimum oxygen concentration) obtained by adding nitrogen to pure air for some representative LNG m...
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Abstract The metal-based catalytic oxidation of alkenes to the corresponding epoxides is playing a significant role in the modern chemical industry. Nevertheless, these key processes are still lacking proper understanding with respect to the gas-phase runaway behaviour (thermal explosion) and to the hot spot formation on the catalytic surface, under the typical process conditions. This work aims to enlighten these aspects by considering either the catalytic or the gas-phase chemistry for the dev...
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Abstract The utilization of low-quality gaseous fuel from biomass gasification and the abundance of oxygen-rich streams obtained as a by-product of nitrogen-air separation by membrane technology has incentivized the development of sustainable oxygen-enriched combustion technologies in the last decades. However, a dearth of experimental and numerical analysis addressing the reactivity and safety aspects of these mixtures at initial low temperatures can be observed in the current literature. In th...
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#1Gianmaria Pio (UNIBO: University of Bologna)H-Index: 5
#2Ernesto Salzano (UNIBO: University of Bologna)H-Index: 27
Abstract The direct epoxidation of light olefins is a key process of the chemical industry. However, several concerns regarding industrial and safety aspects, such as the occurrence of runaway reactions and the relevance of side reactions reducing process selectivity, are still under investigation. To this aim, a reactor operation diagram was obtained under process relevant conditions, allowing for the identification of runaway, hot spots and pseudo adiabatic operation regions by using several c...
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#1Gianmaria Pio (UNIBO: University of Bologna)H-Index: 5
#2Antonio Ricca (UNISA: University of Salerno)H-Index: 12
Last. Ernesto Salzano (UNIBO: University of Bologna)H-Index: 27
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Abstract Environmental regulations have strongly incentivized the development of alternative technologies and renewable sources for the energy supply, including bio-syngas and low-temperature combustion. However, accurate estimation methods for low-temperature chemistry of these mixtures are still missing. Hence, experimental data with the limited impact of fluid dynamics aspects are strongly required. To this aim, the heat flux burner has been adopted in this work for the measurements of the la...
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#1Weiguang An (CUMT: China University of Mining and Technology)H-Index: 2
#2Qing Li (CUMT: China University of Mining and Technology)
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ABSTRACTThe exogenous fire is one of the major disasters of mines. It is difficult to put them out but easy to result in serious casualties and property losses. Until now, the fire combustion in mi...
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#1Gianmaria Pio (UNIBO: University of Bologna)H-Index: 5
#2Antonio Ricca (UNISA: University of Salerno)H-Index: 12
Last. Ernesto Salzano (UNIBO: University of Bologna)H-Index: 27
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Abstract The use of methane is commonly adopted as thermal diluent and chemical inhibitor in the partial oxidation of alkenes, in order to avoid the occurrence of unwanted reactions and full oxidation. Moreover, methane-alkene mixtures are commonly present in several industrial applications such as petrochemical processes. In this work, experimental data for pure ethylene and propylene flames in presence of air were collected, as first. Then the effect of alkenes addition on methane premixed fla...
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