Hydrogen Sulfide from the Black Sea for Hydrogen Production

Demirbas, A.

doi:10.1080/15567030802463844

Cited by 15 publications

(5 citation statements)

References 16 publications

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“…While the current treatment of H 2 S obtained from hydrodesulfurization (HDS) in the Claus process only yields water, the catalytic decomposition of H 2 S can produce hydrogen gas, which is even more valuable for many chemical processes, including HDS (for example, the hydrogen can be recycled back as a feedstock for HDS). In view of the huge global presence and natural reserve of H 2 S, this decomposition approach should possess enormous economic value, since about 64 million tons of sulfur is produced annually from the Claus process, and about 4.6 billion tons of H 2 S is estimated to exist in the Black Sea . In addition, H 2 S removal from sour gas streams is also becoming more important, as the H 2 S concentrations in natural gas streams from conventional and unconventional resources are higher than those in crude oil …”

Section: Discussionmentioning

confidence: 99%

Constrained Growth of MoS₂ Nanosheets within a Mesoporous Silica Shell and Its Effects on Defect Sites and Catalyst Stability for H₂S Decomposition

et al. 2017

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Molybdenum disulfide (MoS2) is a two-dimensional transition-metal dichalcogenide that can form layered nanosheets with catalytically active sites present at edge or defect sites. The density of such active sites can be further tuned by modifying the length, layer number, strain, and surface defects of the sheets. Herein, a synthetic approach has been developed to encapsulate nanoscale MoS2 nanosheets inside a mesoporous silica shell. Small molybdenum(IV) oxide (MoO2) cores were synthesized and coated with a mesoporous silica phase, followed by a conversion to MoS2@SiO2. The space constraint on the inner cores resulted in short, few-layered, highly curved MoS2 nanosheets with circular or flowerlike morphology. The MoS2@SiO2 was evaluated as a catalyst for decomposition of hydrogen sulfide (H2S), which shows high catalytic turnover frequency and superior thermal stability in comparison to unconstrained MoS2 catalysts.

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Section: Discussionmentioning

confidence: 99%

Constrained Growth of MoS₂ Nanosheets within a Mesoporous Silica Shell and Its Effects on Defect Sites and Catalyst Stability for H₂S Decomposition

et al. 2017

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“…Carbon dioxide is the sole component of this sulfuric acid manufacturing facility that contributes to GWP, but H 2 SO 4 , SO 3 , and SO 2 contribute to rising AP . The exergy calculation technique is simplified by utilizing the equations, but the economic-based targets such as FCI (based on bare module cost) were computed using the equations and correlations provided by refs and . The utility costs for power, steam, and cooling water, among other things, were calculated, while TPC includes utility costs in addition to raw material costs such as water and sulfur, as stated in eq : TPC = UT + RM + Other 0.25em expenses …”

Section: Methodsmentioning

confidence: 99%

Multiobjective Optimization and Sustainability Assessment of an Improved Wet Sulfuric Acid-Based Ionic Liquid Process for the Utilization of Hydrogen Sulfide Using a Symmetry Approach

et al. 2022

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Ionic liquids (ILs) are efficient media for the liquid-phase sulfuric acid reaction. Under mild situations, the reaction of H 2 S with CH 4 in ILs happens extremely quick and virtually complete, resulting in liquid sulfuric acid (H 2 SO 4(l) ). 1-hexyl-3methylimidazolium chloride ([hmim][Cl]) ILs were formerly the most effective at capturing and converting H 2 S. It can convert H 2 S to H 2 SO 4(l) with a proportion of up to 96%. This study aimed to develop cutting-edge techniques and assess their applicability for different acidic gas capacities and H 2 S amounts by considering three sustainability metrics which are people (safety), planet (ecological), and profit. Then, to maximize profit while lowering the global warming potential (GWP), fire explosion damage index (FEDI), and toxicity damage index (TDI), a multiobjective optimization (MOO) case was performed. The trade-off between economic, environmental, and safety performance was expressed through Pareto-optimal solutions. The improved wet sulfuric acid (WSA)-based IL method was safer (lower fire and explosion damage index), ecologically friendly (lower GWP), and portable. The findings indicate that the improved WSA-based on IL gives the optimum results compared to conventional WSA processes, such as the profit of 5688$/h increased from 1896$/h, the GWP of 0.0138-ton CO 2 -eq decreased from 0.0275-ton CO 2 -eq, the TDI of 6.72 decreased from 13.44, and the FEDI of 6.18 decreased from 20.6, respectively. This discovery opens the door to a viable strategy for capturing and converting H 2 S from an acid gas stream.

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“…[95] The total H 2 energy potential is estimated to be about 270milliont ons, produced from 4.587 billion tons of H 2 Si nB lack Sea deep water. [23,96] This amount of H 2 can provide 38.3 millionTJo ft hermal energy or 8.97 million GWh of electricale nergy. [23] Moreover,t he total H 2 potential in Black Sea deep water corresponds to 808 million tons of gasoline, 766 milliont ons of natural gas, 841 milliont ons of fuel oil or 851 milliont ons of petroleum.…”

Section: Hydrogenfrom Black Sea Deep Watermentioning

confidence: 99%

Fuel Production from Seawater and Fuel Cells Using Seawater

2017

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Seawater is the most abundant resource on our planet and fuel production from seawater has the notable advantage that it would not compete with growing demands for pure water. This Review focuses on the production of fuels from seawater and their direct use in fuel cells. Electrolysis of seawater under appropriate conditions affords hydrogen and dioxygen with 100 % faradaic efficiency without oxidation of chloride. Photoelectrocatalytic production of hydrogen from seawater provides a promising way to produce hydrogen with low cost and high efficiency. Microbial solar cells (MSCs) that use biofilms produced in seawater can generate electricity from sunlight without additional fuel because the products of photosynthesis can be utilized as electrode reactants, whereas the electrode products can be utilized as photosynthetic reactants. Another important source for hydrogen is hydrogen sulfide, which is abundantly found in Black Sea deep water. Hydrogen produced by electrolysis of Black Sea deep water can also be used in hydrogen fuel cells. Production of a fuel and its direct use in a fuel cell has been made possible for the first time by a combination of photocatalytic production of hydrogen peroxide from seawater and dioxygen in the air and its direct use in one‐compartment hydrogen peroxide fuel cells to obtain electric power.

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Hydrogen Sulfide from the Black Sea for Hydrogen Production

Cited by 15 publications

References 16 publications

Constrained Growth of MoS₂ Nanosheets within a Mesoporous Silica Shell and Its Effects on Defect Sites and Catalyst Stability for H₂S Decomposition

Constrained Growth of MoS₂ Nanosheets within a Mesoporous Silica Shell and Its Effects on Defect Sites and Catalyst Stability for H₂S Decomposition

Multiobjective Optimization and Sustainability Assessment of an Improved Wet Sulfuric Acid-Based Ionic Liquid Process for the Utilization of Hydrogen Sulfide Using a Symmetry Approach

Fuel Production from Seawater and Fuel Cells Using Seawater

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Hydrogen Sulfide from the Black Sea for Hydrogen Production

Cited by 15 publications

References 16 publications

Constrained Growth of MoS2 Nanosheets within a Mesoporous Silica Shell and Its Effects on Defect Sites and Catalyst Stability for H2S Decomposition

Constrained Growth of MoS2 Nanosheets within a Mesoporous Silica Shell and Its Effects on Defect Sites and Catalyst Stability for H2S Decomposition

Multiobjective Optimization and Sustainability Assessment of an Improved Wet Sulfuric Acid-Based Ionic Liquid Process for the Utilization of Hydrogen Sulfide Using a Symmetry Approach

Fuel Production from Seawater and Fuel Cells Using Seawater

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Constrained Growth of MoS₂ Nanosheets within a Mesoporous Silica Shell and Its Effects on Defect Sites and Catalyst Stability for H₂S Decomposition

Constrained Growth of MoS₂ Nanosheets within a Mesoporous Silica Shell and Its Effects on Defect Sites and Catalyst Stability for H₂S Decomposition