Recent Advances in Methane Pyrolysis: Turquoise Hydrogen with Solid Carbon Production

Korányi, Tamás I.; Németh, Miklós; Beck, Andrea; Horváth, Anita

doi:10.3390/en15176342

Cited by 69 publications

(15 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“… Turquoise hydrogen, like gray and blue, uses methane as a feedstock. However, in this case, methane pyrolysis results in hydrogen with carbon removed in a solid form rather than CO 2 . In Table are reported feedstock, products, and operating conditions of commercial hydrogen production processes, labeled by their color codes.…”

Section: Introductionmentioning

confidence: 99%

Cyan Hydrogen Process: A New Route for Simultaneous Hydrogen Production and Carbon Valorization

Di Nardo,

Portarapillo,

Russo

et al. 2024

ACS Omega

View full text Add to dashboard Cite

Hydrogen is expected to largely contribute to the near-future circular economy. Today, most hydrogen is still produced from fossil fuels or renewable pathways with low efficiency and high cost. Herein, a proof of concept for a novel hydrogen production process is proposed, here named cyan hydrogen, inspired by a combination of the green and blue processes, due to the key role played by water and the low carbon content in the gas phase, respectively. The developed novel process, recently patented and demonstrated at the lab scale, is based on successive steps in which ethanol (5.0 mL) and water (10.0 mL) are alternately fed, with a fixed initial amount of sodium metaborate (2.0 g), in a batch reactor at 300 °C. Preliminary results showed the simultaneous production of a 95% v/v hydrogen stream, a polymeric byproduct with a repetitive carbon pattern −CH2–CH2–, and a liquid phase rich in oxygenated chemicals at temperatures lower than conventional hydrogen production processes.

show abstract

Section: Introductionmentioning

confidence: 99%

Cyan Hydrogen Process: A New Route for Simultaneous Hydrogen Production and Carbon Valorization

Di Nardo,

Portarapillo,

Russo

et al. 2024

ACS Omega

View full text Add to dashboard Cite

show abstract

“…Methane pyrolysis is another promising technology for producing low-carbon H 2 from fossil fuels. The process involves the thermal decomposition of CH 4 into H 2 and carbon at high temperatures (1000–1100 °C) . Methane pyrolysis is a CO 2 -free process, as the carbon byproduct can be sequestered or utilized.…”

Section: Introductionmentioning

confidence: 99%

A Novel 2-Reactor Chemical Looping System for Hydrogen Production with Biogas as the Feedstock: Process Simulation and Comparison with Conventional Reforming Processes

Zhang,

Jawdekar,

Gun

et al. 2024

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

With increasing environmental concerns because of greenhouse gas (GHG) emissions from conventional sources of energy, a tremendous shift in momentum is observed toward clean combustion sources and carbon-neutral feedstocks. Hydrogen (H 2 ) as a fuel negates carbon emissions during energy generation and hence is gaining attention as a valuable source of energy. The existing processes for producing H 2 use non-renewable fossil fuels as feedstock. Biogas derived from the decomposition of waste organic matter is a renewable and carbon-neutral feedstock that can be utilized for fossil-free H 2 generation. In this study, a novel 2-reactor chemical looping water-splitting process (CLWS-2R) is introduced, simulated, and analyzed for the production of H 2 from biogas. Process simulations are carried out for the CLWS-2R system to achieve optimized process parameters for the desired system operating conditions. The process evaluation parameters of this scheme are compared with three established processes for H 2 production from biogas, including the 3-reactor chemical looping water-splitting (CLWS-3R), the steam reforming (SR), and the mixed reforming (MR) process. The simulation results from this study indicate that for a biogas feedstock composition of 25% CO 2 by volume, the CLWS-2R system can achieve the highest cold gas efficiency (CGE: 75%) and the highest effective thermal efficiency (ETE: 71%). The sensitivity analysis on biogas composition indicates that CLWS-2R achieves its highest ETE for biogas with a low CO 2 content (25−30 vol %), which is almost equivalent to the ETE obtained using MR. For all the remaining biogas compositions with high CO 2 content, MR achieves the highest ETE.

show abstract

“…Among reviews and books that relate to electrically heated fluidized beds (EHFBs), some are focused on specific applications with either a single electric heating principle, − or multiple electric heating principles. − Some are focused on a specific heating principle, but with various applications. , Moreover, others are mainly focused on electrochemistry and electrostatics. − None provide a comprehensive summary of the different options to electrically heat a fluidized bed. Hence, the goal of this review is to provide an overview of electric heating options for fluidized beds, highlight implications for various industrial applications, and outline knowledge gaps.…”

Section: Introductionmentioning

confidence: 99%

Electrically Heated Fluidized Beds─A Review

Ahmed,

Duchesne,

Tan

et al. 2024

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Fluidized beds heated via fossil fuel combustion have been widely used in industry for various applications. Heating these fluidized beds with clean electricity is emerging as a promising solution to reduce greenhouse gas emissions, improve overall energy efficiency, and for some applications, improve product quality. This review covers the development status of electrically heated fluidized beds (EHFBs) with a variety of heating principles, including Joule heating, induction heating, electromagnetic irradiation, sonication, plasma heating and gas preheating. An analysis of the advantages and disadvantages of these heating principles is presented, along with their suitability for different applications. Current and potential industrial applications using EHFBs for highly diversified processes, from material processing and biomass gasification to space exploration, are highlighted. Each application presents its own unique opportunities and challenges. The selection of a method to deliver electrical heat depends on the specific purpose of each application, materials involved, and the required configuration of the EHFB. Hence, methods to assess key performance indicators are described. To date, only a few applications have been commercialized, mostly for drying and material processing. Recommendations for EHFB advancement are provided so that their full potential can be realized.

show abstract

Recent Advances in Methane Pyrolysis: Turquoise Hydrogen with Solid Carbon Production

Cited by 69 publications

References 44 publications

Cyan Hydrogen Process: A New Route for Simultaneous Hydrogen Production and Carbon Valorization

Cyan Hydrogen Process: A New Route for Simultaneous Hydrogen Production and Carbon Valorization

A Novel 2-Reactor Chemical Looping System for Hydrogen Production with Biogas as the Feedstock: Process Simulation and Comparison with Conventional Reforming Processes

Electrically Heated Fluidized Beds─A Review

Contact Info

Product

Resources

About