Hydrogen sulphide to hydrogen via H2S methane reformation: Thermodynamics and process scheme assessment

Spatolisano, Elvira; Guido, Giorgia De; Pellegrini, Laura; Calemma, Vincenzo; Angelis, Alberto R. de; Nali, M.

doi:10.1016/j.ijhydene.2022.03.090

Cited by 26 publications

(19 citation statements)

References 16 publications

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“…A complete review of H 2 S to H 2 valorisation processes was published by De Crisci and co‐workers in 2018 65. The main H 2 S to H 2 conversion processes reported in literature are: H 2 S Methane Reformation (H2SMR), which is undoubtedly the most mature technology for hydrogen production from hydrogen sulphide 66, 67. The reaction behind the process is:

true \begin{matrix} center 2 {normalH}_{2} normalS + {normalCH}_{4} \to {normalCS}_{2} + {4 normalH}_{2} Δ H_{298 normalK}^{0} = 232.4 {normal normalkJ normal normalmol}^{normal- 1} \end{matrix}

…”

Section: Novel H2s To H2valorisation Processesmentioning

confidence: 99%

“…H 2 S Methane Reformation (H2SMR), which is undoubtedly the most mature technology for hydrogen production from hydrogen sulphide 66, 67. The reaction behind the process is:

true \begin{matrix} center 2 {normalH}_{2} normalS + {normalCH}_{4} \to {normalCS}_{2} + {4 normalH}_{2} Δ H_{298 normalK}^{0} = 232.4 {normal normalkJ normal normalmol}^{normal- 1} \end{matrix}

…”

Section: Novel H2s To H2valorisation Processesmentioning

confidence: 99%

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Middle Scale Hydrogen Sulphide Conversion and Valorisation Technologies: A Review

2022

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The growing energy demand, together with the depletion of sweet gas reservoirs, impose the monetization of ultra‐sour natural gas fields with a high H2S content. To date, in large scale facilities, H2S is removed from natural gas through amine washing and it is converted to sulphur in the Claus process. The Claus process is the leading H2S conversion technology for large scale applications. Regarding small scale plants, scavengers are the most efficient and widely spread choice. On the other hand, present middle scale options show quite high operating costs. Therefore, research efforts are devoted to developing new intermediate scale alternatives with lower costs and easier operability. When developing a new process, the study of the state‐of‐the‐art is the first essential step. No systematic review of H2S valorisation technologies is available in literature. To fill this gap, the aim of this work is to summarize the available processes considering both commercial and novel tendencies for H2S conversion. For each technology, details about process operating conditions are discussed and the typical application is provided, when possible, together with the corresponding pros and cons.

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true \begin{matrix} center 2 {normalH}_{2} normalS + {normalCH}_{4} \to {normalCS}_{2} + {4 normalH}_{2} Δ H_{298 normalK}^{0} = 232.4 {normal normalkJ normal normalmol}^{normal- 1} \end{matrix}

…”

Section: Novel H2s To H2valorisation Processesmentioning

confidence: 99%

“…H 2 S Methane Reformation (H2SMR), which is undoubtedly the most mature technology for hydrogen production from hydrogen sulphide 66, 67. The reaction behind the process is:

true \begin{matrix} center 2 {normalH}_{2} normalS + {normalCH}_{4} \to {normalCS}_{2} + {4 normalH}_{2} Δ H_{298 normalK}^{0} = 232.4 {normal normalkJ normal normalmol}^{normal- 1} \end{matrix}

…”

Section: Novel H2s To H2valorisation Processesmentioning

confidence: 99%

Middle Scale Hydrogen Sulphide Conversion and Valorisation Technologies: A Review

2022

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“…In the energy transition era from fossil fuels to renewables, a radical change is happening in the energy system to achieve the decarbonisation target. In this framework, hydrogen plays a leading role as an energy vector for the generation of clean and sustainable energy. , …”

Section: Introductionmentioning

confidence: 99%

Ammonia as a Carbon-Free Energy Carrier: NH₃ Cracking to H₂

Spatolisano

Pellegrini

Angelis

et al. 2023

Ind. Eng. Chem. Res.

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In the energy transition from fossil fuels to renewables, hydrogen is a realistic alternative to achieving the decarbonization target. However, its chemical and physical properties make its storage and transport expensive. To ensure the cost-effective H 2 usage as an energy vector, other chemicals are getting attention as H 2 carriers. Among them, ammonia is the most promising candidate. The value chain of NH 3 as a H 2 carrier, considering the long-distance ship transport, includes NH 3 synthesis and storage at the loading terminal, NH 3 storage at the unloading terminal, and its cracking to release H 2 . NH 3 synthesis and cracking are the cost drivers of the value chain. Also, the NH 3 cracking at large scale is not a mature technology, and a significant effort has to be made in intensifying the process as much as possible. In this respect, this work reviews the available technologies for NH 3 cracking, critically analyzing them in view of the scale up to the industrial level.

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“…In particular, temperatures above 1400 °C and a H 2 S/CH 4 molar ratio of 4 are required. To lower this threshold temperature for the carbon formation (TTC) up to 1000 °C, a much higher H 2 S/CH 4 ratio is required, which results in a significant increase in the thermal duty 19 and a notable worsening of the economics caused mainly by the decrease in the conversion per step of H 2 S. 20 In this work, an innovative approach to alleviating the limitations currently encountered in methane reforming with H 2 S is presented. Specifically, methane reforming co-feeding H 2 S and sulfur (S−H 2 SMR) is reported for the first time.…”

Section: Introductionmentioning

confidence: 99%

Methane Reforming with H₂S and Sulfur for Hydrogen Production: Thermodynamic Assessment

et al. 2023

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Nowadays, most of the hydrogen is obtained from fossil fuels. At the same time, the effort and resources dedicated to the development of sustainable hydrogen manufacturing processes are rapidly increasing to promote the energy transition toward renewable sources. In this direction, a potential source of hydrogen could be hydrogen sulfide, produced as a byproduct in several processes, and in particular in the oil extraction and refinery operations. Methane reforming using H2S has recently attracted much interest for its economic and environmental implications. Its conversion, in fact, provides a viable way for the elimination of a hazardous molecule, producing a high-added value product like hydrogen. At the same time, some of the still open key aspects of this process are the coke deposition due to thermal pyrolysis of methane and the process endothermicity. In this work, the methane reforming with H2S by co-feeding sulfur is investigated through a detailed thermodynamic analysis as a way to alleviate the critical aspects highlighted for the process. A parametric analysis was conducted to assess the best thermodynamic conditions in terms of pressure, temperature, and feed composition. Changing the sulfur, H2S, and methane feed composition can enhance the system by improving the hydrogen production yield, reducing the carbon and sulfur deposition, increasing the H2S removal efficiency, and reducing the necessary thermal duty.

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Hydrogen sulphide to hydrogen via H2S methane reformation: Thermodynamics and process scheme assessment

Cited by 26 publications

References 16 publications

Middle Scale Hydrogen Sulphide Conversion and Valorisation Technologies: A Review

Middle Scale Hydrogen Sulphide Conversion and Valorisation Technologies: A Review

Ammonia as a Carbon-Free Energy Carrier: NH₃ Cracking to H₂

Methane Reforming with H₂S and Sulfur for Hydrogen Production: Thermodynamic Assessment

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Hydrogen sulphide to hydrogen via H2S methane reformation: Thermodynamics and process scheme assessment

Cited by 26 publications

References 16 publications

Middle Scale Hydrogen Sulphide Conversion and Valorisation Technologies: A Review

Middle Scale Hydrogen Sulphide Conversion and Valorisation Technologies: A Review

Ammonia as a Carbon-Free Energy Carrier: NH3 Cracking to H2

Methane Reforming with H2S and Sulfur for Hydrogen Production: Thermodynamic Assessment

Contact Info

Product

Resources

About

Ammonia as a Carbon-Free Energy Carrier: NH₃ Cracking to H₂

Methane Reforming with H₂S and Sulfur for Hydrogen Production: Thermodynamic Assessment