Comparative thermodynamic and techno-economic analysis of ammonia engine with partial pre-cracking versus natural gas engine with carbon capture and storage: towards well-to-wake maritime decarbonization

Yuanxin Gao

doi:10.1016/j.enconman.2026.122009

Comparative thermodynamic and techno-economic analysis of ammonia engine with partial pre-cracking versus natural gas engine with carbon capture and storage: towards well-to-wake maritime decarbonization

2026-08-03

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PRE

AI

Y

Yuanxin Gao

Y

Yongming Feng *

J

Jinbo Qu

Y

Yusong Wang

刘慧泉 (Huiquan Liu)

Y

Yuanqing Zhu

DOI：10.1016/j.enconman.2026.122009

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• A thermochemical recovery system for an ammonia engine is proposed to achieve partial fuel pre-cracking. • The overall energy and exergy efficiencies of the ammonia engine system reach 41.67% and 46.76%, respectively. • Using green ammonia reduces well-to-wake GHG emissions by up to 86% compared to the baseline LNG engine. • The ammonia engine exhibits a lower CAPEX, whereas the LNG engine with CCS demonstrates a superior OPEX. • The TOPSIS algorithm identifies the green ammonia pathway as the optimal strategic balance between the emissions and the costs.

Comparative thermodynamic and techno-economic analysis of ammonia engine with partial pre-cracking versus natural gas engine with carbon capture and storage: towards well-to-wake maritime decarbonization

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