Natural Gas Autothermal Reforming: an Effective Option for a Sustainable Distributed Production of Hydrogen

Ciambelli, Paolo; Palma, Vincenzo; Palo, Emma; Iaquaniello, Gaetano

doi:10.1002/9783527625413.ch9

Cited by 8 publications

(2 citation statements)

References 87 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A detailed experimental process was discussed 41 . Paolo et al studied the ATR of natural gas on the basis of different parameters such as catalysts, operating conditions, economic aspects and thermodynamic analysis and concluded that ATR is an efficient option for sustainable hydrogen production 42,43 . Rabenstein reported that temperatures below 600°C and an oxygen/ethanol ratio below 0.75 in the ATR of ethanol had no significant effect on coke elimination and hydrogen generation 44 …”

Section: Introductionmentioning

confidence: 99%

Thermodynamic analysis of autothermal steam‐reforming of methane for ammonia production

2020

View full text Add to dashboard Cite

Summary Autothermal reforming of methane is one of the most widely reported techniques for syngas production. This thermodynamic analysis discusses two aspects of autothermal reforming: first, to obtain hydrogen to nitrogen in the ratio 3:1, which is the most suitable feed ratio for ammonia production in the Haber–Bosch process, and then to find out the thermoneutral point of the process. Throughout the study, all simulations are carried out at 1 bar pressure and within the temperature range 500–1000°C. Conditions with more than 99% methane conversion and 0.1% coke deposition are considered. Other parameters taken into account for optimization are OMR (oxygen to methane ratio) in range 0.4–0.6, SMR (steam to methane ratio) in range 1.5–3.5 and oxygen enrichment in air from 25% to 40%. This study briefly discusses the water gas shift (WGS) reaction for CO removal and its conversion to H2. The best thermoneutral point for the reformer was found to be at OMR = 0.59845, SMR = 2.105, with an oxygen enrichment level of 39.4%.

show abstract

Section: Introductionmentioning

confidence: 99%

Thermodynamic analysis of autothermal steam‐reforming of methane for ammonia production

2020

View full text Add to dashboard Cite

show abstract

“…ATR combines both SMR and POM, where the heat generated 2 by partial oxidation provides the energy required for the SMR reaction, making ATR an attractive process for syngas generation. 22 Figure 2 -Gas-to-liquid processes.…”

Section: Gtl Processesmentioning

confidence: 99%

Caracterização e avaliação de catalisadores de Fe suportado em zeólita HZSM-5 para a síntese de Fishcer-Tropsch

Silva

View full text Add to dashboard Cite

The increasing of energy demand and the concerns about the climate change make the development of synthetic fuels of utmost importance. The Fischer-Tropsch synthesis (FTS), a step in the gas-to-liquid processes, is a catalytic reaction that converts synthesis gas (CO and H2) into a wide range of hydrocarbons and is as a promising technology to produce synthetic fuels. This process occurs by a polymerization mechanism and its results are dependent on the operating conditions, and mainly on the catalyst used. Iron (Fe)/zeolite catalysts have been extensively studied for FTS due to their cost-effectiveness and bifunctional activity. However, little research has been reported addressing a complete understanding of physical-chemical properties of Fe/H-ZSM5 and the effects of varied reaction condition on FTS, as well as the kinetic assessment of CO conversion over this type of catalyst. This work focused on studying the synthesis, characterization, catalytic and kinetic assessments of Fe/H-ZSM5 for Fischer-Tropsch synthesis. The characterization results showed zeolite and iron oxide structures with crystallinity, high surface area of the support, and presence of mesopores. Fe particles were heterogeneously distributed on the support in different sizes, presenting multiple reduction stages. The catalysts were active for the Fischer-Tropsch synthesis, showing a maximum CO conversion of 86% at 350°C and an average conversion greater than 50% at 300°C. In general, the catalysts exhibited greater formation of short-chain, C2-C4, and medium chain, C5-C8, hydrocarbons. Temperature, pressure, space velocity and feed composition showed a considerable influence on CO conversion. The catalyst exhibited a stable activity over time without structural changes or coke deposition. Finally, the proposed kinetic model for the best performing catalyst followed the carbide route, considering a double site mechanism with dissociative adsorption of CO and H2, and participation of CO2, which was further confirmed by in situ characterization.

show abstract

Hydrogen Production

2024

Net‐Zero and Low Carbon Solutions for the Energy Sector

View full text Add to dashboard Cite

Natural Gas Autothermal Reforming: an Effective Option for a Sustainable Distributed Production of Hydrogen

Cited by 8 publications

References 87 publications

Thermodynamic analysis of autothermal steam‐reforming of methane for ammonia production

Thermodynamic analysis of autothermal steam‐reforming of methane for ammonia production

Caracterização e avaliação de catalisadores de Fe suportado em zeólita HZSM-5 para a síntese de Fishcer-Tropsch

Hydrogen Production

Contact Info

Product

Resources

About