Direct Methanation of CO<sub>2</sub> in Biogas with Hydrogen from Water Electrolysis: The Catalyst and System Efficiency

Zhang, Liu; Ma, Fangping; Zeng, Qing; Peng, Fang; Hu, Qian; Wu, Kejing; Yang, Yilin; Lu, Houfang; Liang, Bin

doi:10.1021/acs.energyfuels.2c00437

Cited by 4 publications

(5 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, the deposited SiO 2 exhibits an interaction with NiO after the CVD treatment of Ni/YSZ powder, and the interaction is weaker than nickel silicate. When Ni/YSZ-SiO 2 powder is sintered at 1400 °C, three peaks are observed near 422, 477, and 799 °C. The first peak near 422 °C is related to the weak interaction between NiO and SiO 2 , and the other two peaks are typical reduction peaks of nickel silicate.…”

Section: Resultsmentioning

confidence: 99%

“…According to the literature, a strong interaction between SiO 2 and Zr contributes to the formation of crystalline ZrSiO 4 after high-temperature sintering, , and nickel silicate is beneficial to anchor nano-Ni particles with anti-sintering property at high temperature. , Thus, the SiO 2 medium is expected to realize the highly dispersed Ni on YSZ with resistance to agglomeration, which may result in improved power density and stability. The liquid-phase deposition method shows difficulty in guaranteeing the uniformity of a nano-SiO 2 film on the Ni/YSZ surface, and impurities are easy to be introduced during the deposition process .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Highly Dispersed Ni over a YSZ Anode Anchored by SiO₂ at High Temperature through Low-Temperature Chemical Vapor Deposition

Yang

Hu²,

Zhang³

et al. 2023

Energy Fuels

Self Cite

View full text Add to dashboard Cite

Supported Ni on yttria stabilized zirconia (YSZ) is the most widely used anode for a solid oxide fuel cell (SOFC), where Ni particles are easy to agglomerate at a high temperature of 1400 °C and reductive hydrothermal environments. In this study, Ni particles are successfully dispersed on YSZ through strong interaction between Ni and SiO 2 . The thin and amorphous SiO 2 films, grown by low-temperature chemical vapor deposition (CVD), become spherical particles of nickel silicates uniformly dispersed on the YSZ skeleton after sintering at 1400 °C. Also, the SiO 2 -anchored Ni particles supported on YSZ (Ni/YSZ-SiO 2 ) are obtained via direct reduction. The electrochemical performance of the Ni/YSZ-SiO 2 anode shows a higher power density of approximately 18% than an unmodified Ni/YSZ anode, which resulted from the longer effective TPB area assigned to the highly dispersed Ni particles. The microstructure containing SiO 2 -anchored Ni particles exhibits high stability under testing and reductive hydrothermal conditions. Accordingly, the method of growing a SiO 2 layer via low-temperature CVD is considered as a probable route for the preparation of the Ni/YSZ electrode material with a well-defined microstructure.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Highly Dispersed Ni over a YSZ Anode Anchored by SiO₂ at High Temperature through Low-Temperature Chemical Vapor Deposition

Yang

Hu²,

Zhang³

et al. 2023

Energy Fuels

Self Cite

View full text Add to dashboard Cite

show abstract

“…As for the CO 2 methanation section, two tandem methanation reactors are applied to achieve 98% CO 2 conversion [14]. The stream in the mixed gas of H 2 and CO 2 is separated to improve CO 2 conversion.…”

Section: Ifemmt-2022mentioning

confidence: 99%

Design of an integrated CO₂ methanation system with CO₂ capture from flue gas and H₂ production from water electrolysis

Zhang²,

Hu³

et al. 2023

J. Phys.: Conf. Ser.

Self Cite

View full text Add to dashboard Cite

As one of the important Power to X technologies, CO2 methanation realizes the storage of green hydrogen and the emission reduction of flue gas CO2. In this study, process modeling was applied for CO2 methanation coupled with CO2 capture and water electrolysis. Aspen Plus and HYSYS models of 400 kW water electrolysis were set up for integration. The heat exchange network and the reaction temperature and catalyst usage of two methanation reactors are optimized. The effects of step-wise evolution of H2 flow on stream flows and reactors are also studied. The results show a system energy efficiency of 42.3% using a high-temperature solid oxide electrolysis cell (SOEC) and 30% monoethanolamide solution (MEA). The heat-exchange network significantly improves the efficiency to 61.5%. Optimizing two-stage methanation reactors realizes 98% CO2 conversion at 10018 h-1 gas hourly space velocity. The optimized reaction temperatures are 390 and 325 °C, respectively. The Aspen HYSYS dynamic modeling shows that the flows reach stability within 10 min under 1 kmol/h step-wise evolution of H2 flow. Longer time is required to approach the stability of the methanation reactor. Sharp evolutions of H2 flow cause higher amplitudes and a longer time to reach stability. The H2 flow lower than 35% of the initial value would result in the unstable behavior of the methanation reactor.

show abstract

“…After desulfurization, biogas can be directly burned or used for power generation. Currently, various upgrading methods can be employed to purify biogas for application in natural gas networks, such as CO2 capture and methanation [3]. Utilizing renewable electricity for hydrogen production and then directly converting CO2 in biogas into methane to produce biomethane is an effective Power-to-Gas (P2G) technology [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…Witte et al [4] verified the feasibility of direct biogas methanation, achieving an average methane yield of 96% at 350°C and 7 atm, and stable operation for over 1100 hours. Zhang et al [3], through systematic simulation, achieved the integration of renewable electricity hydrogen production and biogas methanation, indicating that high-temperature solid oxide electrolysis cells (SOEC) can effectively utilize heat in conjunction with methanation. Other studies also demonstrate the feasibility and economic viability of coupling methanation with SOEC systems [7,8].…”

Section: Introductionmentioning

confidence: 99%

Integrated power and gas system from biomass based on water electrolysis and CO2 methanation

Ye,

Zhang,

et al. 2024

Eighth International Conference on Energy System, Electricity, and Power (ESEP 2023)

View full text Add to dashboard Cite

Based on biogas production, biomass thermal power generation, solid oxide electrolytic cell (SOEC), and biogas methanation, the simulation of biomass integrated power and gas system and the analysis of energy supply and demand relationship were realized by using energy and substance balance models. The results show that SOEC is coupled with methanation and thermal power generation with heat exchange, and the energy conversion efficiency of the system is 25.73%. The different utilizations of dry and wet biomass are conducive to improving overall energy efficiency. The oxygen by-product from SOEC can improve the efficiency of thermal power generation, and the decrease in the condensation temperature and pressure of spent steam benefits improving the power generation efficiency. The selection of biomass with high calorific value and low hydrogen-to-carbon ratio is conducive to improving energy conversion efficiency. Combined with energy storage, the conventional power and gas demand of residents can be realized, a negative correlation exists between the power and gas storage, and a decrease in the power storage will lead to SOEC working at high or low loads.

show abstract

Direct Methanation of CO₂ in Biogas with Hydrogen from Water Electrolysis: The Catalyst and System Efficiency

Cited by 4 publications

References 46 publications

Highly Dispersed Ni over a YSZ Anode Anchored by SiO₂ at High Temperature through Low-Temperature Chemical Vapor Deposition

Highly Dispersed Ni over a YSZ Anode Anchored by SiO₂ at High Temperature through Low-Temperature Chemical Vapor Deposition

Design of an integrated CO₂ methanation system with CO₂ capture from flue gas and H₂ production from water electrolysis

Integrated power and gas system from biomass based on water electrolysis and CO2 methanation

Contact Info

Product

Resources

About

Direct Methanation of CO2 in Biogas with Hydrogen from Water Electrolysis: The Catalyst and System Efficiency

Cited by 4 publications

References 46 publications

Highly Dispersed Ni over a YSZ Anode Anchored by SiO2 at High Temperature through Low-Temperature Chemical Vapor Deposition

Highly Dispersed Ni over a YSZ Anode Anchored by SiO2 at High Temperature through Low-Temperature Chemical Vapor Deposition

Design of an integrated CO2 methanation system with CO2 capture from flue gas and H2 production from water electrolysis

Integrated power and gas system from biomass based on water electrolysis and CO2 methanation

Contact Info

Product

Resources

About

Direct Methanation of CO₂ in Biogas with Hydrogen from Water Electrolysis: The Catalyst and System Efficiency

Highly Dispersed Ni over a YSZ Anode Anchored by SiO₂ at High Temperature through Low-Temperature Chemical Vapor Deposition

Highly Dispersed Ni over a YSZ Anode Anchored by SiO₂ at High Temperature through Low-Temperature Chemical Vapor Deposition

Design of an integrated CO₂ methanation system with CO₂ capture from flue gas and H₂ production from water electrolysis