Combustion characteristics of ammonia–air in a heat-recirculating Swiss-roll burner DOI

Bowen Sun,

Xin Kang, Yu Wang

et al.

Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(11)

Published: Nov. 1, 2024

Ammonia has emerged as a promising carbon-free fuel for mitigating greenhouse gas emissions. However, its application in practical combustion systems is limited by several issues including low heating value and slow flame propagation speed, which have posed challenges maintaining stable combustion. As an attempt to resolve these issues, we numerically investigated premixed ammonia–air using detailed chemical mechanism heat-recirculating, Swiss-roll burner that was proposed based on the concept of “excess-enthalpy.” The main focus put stabilizations well characteristics NO/N2O emissions across wide range operational conditions. results showed use led significantly broadened stability regime pure ammonia combustion, could be attributed effective preheating from products unburnt mixture. relationship between dimensionless heat transfer parameter excess-enthalpy quantified linear correlation revealed. In addition, flow expansion recirculation within chamber generation vortices, also beneficial stabilizations. NO at outlet were witnessed growth laminar region, gentler increase flow-transition stage, final leveling off turbulent condition with Reynolds number. For given number, emission non-monotonic variation equivalence ratios, relatively levels either fuel-lean or fuel-rich another major concern, N2O found more significant region conditions, both should avoided operations.

Language: Английский

Carbon-contract-for-difference (CCfD) and green transition of coal power under dual price uncertainties in the Korean market—a real options approach DOI
Qu Jingyu,

Jeon Wooyoung

Applied Economics, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 17

Published: Jan. 19, 2025

Language: Английский

Citations

0
Evaluation of the Technical and Environmental Viability of a Bioethanol, Propene, and Green Ammonia Process for Acetonitrile Production through a Comprehensive Life Cycle Assessment DOI Creative Commons
Izabela Silva Freitas,

Aryane Maria de Oliveira Lima,

Edson de Paiva Alves

et al.

ACS Sustainable Chemistry & Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: March 28, 2025

Language: Английский

Citations

0
Development and techno-economic analysis of an innovative solar-based ammonia synthesis system DOI
Zihan Lin, Muhammad Sajid Khan, Saboora Khatoon

et al.

Process Safety and Environmental Protection, Journal Year: 2025, Volume and Issue: unknown, P. 107128 - 107128

Published: April 1, 2025

Language: Английский

Citations

0
Simulation study on coal and ammonia co-firing in a tangential firing boiler under different ammonia injection methods DOI Creative Commons

Wangping Sun,

Qifu Lin, Haiyan Li

et al.

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: May 6, 2025

As a new zero-carbon fuel, ammonia co-firing in coal-fired boilers is one of the feasible technologies for reducing carbon emission. This study validated an ammonia-coal simulation model using experimental data from 300 MW unit tangential firing boiler, and investigated impacts different injection methods (uniform injection, lower layer concentrated upper injection) at 20% ratio on boiler performance. Key findings include flow fields characteristics: uniform enhanced pattern, while pure burners modes exhibited weaker momentum compared to coal burners; combustion temperature fields: all three reduced peak furnace temperatures but increased flue gas outlet; burnout performance: inhibited burnout, whereas promoted it; NOx emissions: both emissions, significantly them. These conclusions provide critical guidance retrofitting power plant co-firing.

Language: Английский

Citations

0
Thermodynamic analysis of decarbonizing NGCC power plants by the tail-end green ammonia-driven calcium looping DOI Creative Commons
Song He,

Xuelan Zeng,

Yawen Zheng

et al.

Energy, Journal Year: 2024, Volume and Issue: unknown, P. 134147 - 134147

Published: Dec. 1, 2024

Language: Английский

Citations

2
Economic Viability and CO2 Emissions of Hydrogen Production for Ammonia Synthesis: A comparative analysis across Europe DOI Creative Commons

Alessandro Magnino,

Paolo Marocco, Massimo Santarelli

et al.

Advances in Applied Energy, Journal Year: 2024, Volume and Issue: unknown, P. 100204 - 100204

Published: Dec. 1, 2024

Language: Английский

Citations

1
Bifunctional nanoporous gold-copper@ZIF film for highly efficient nitrogen electro-fixation DOI

Shulin Zhao,

Guorui Tang,

Xiaoyun Liu

et al.

Inorganic Chemistry Frontiers, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

This work presents a unique electrocatalyst made of nanoporous AuCu alloys incorporated in ZIF-71 film with bifunctional catalytic performance for electrocatalytic nitrogen fixation.

Language: Английский

Citations

0
Combustion characteristics of ammonia–air in a heat-recirculating Swiss-roll burner DOI

Bowen Sun,

Xin Kang, Yu Wang

et al.

Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(11)

Published: Nov. 1, 2024

Ammonia has emerged as a promising carbon-free fuel for mitigating greenhouse gas emissions. However, its application in practical combustion systems is limited by several issues including low heating value and slow flame propagation speed, which have posed challenges maintaining stable combustion. As an attempt to resolve these issues, we numerically investigated premixed ammonia–air using detailed chemical mechanism heat-recirculating, Swiss-roll burner that was proposed based on the concept of “excess-enthalpy.” The main focus put stabilizations well characteristics NO/N2O emissions across wide range operational conditions. results showed use led significantly broadened stability regime pure ammonia combustion, could be attributed effective preheating from products unburnt mixture. relationship between dimensionless heat transfer parameter excess-enthalpy quantified linear correlation revealed. In addition, flow expansion recirculation within chamber generation vortices, also beneficial stabilizations. NO at outlet were witnessed growth laminar region, gentler increase flow-transition stage, final leveling off turbulent condition with Reynolds number. For given number, emission non-monotonic variation equivalence ratios, relatively levels either fuel-lean or fuel-rich another major concern, N2O found more significant region conditions, both should avoided operations.

Language: Английский

Citations

0