Insights into CO2 removal mechanism via the carbonaceous surface in the exhaust gas of marine NG engines: A first-principles study

Zhang, Yi; Li, Gesheng; Zhang, Zunhua; Huang, Yong; Zhou, Mengni; Yi, Wei

doi:10.1016/j.apsusc.2023.156542

Cited by 6 publications

(2 citation statements)

References 42 publications

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“…In 2023, Zhang et al studied the ability of carbon-based materials to adsorb CO 2 and analyzed the effects of CH 4 , H 2 O, NO X , etc., in ship exhaust on the decarbonization rate. 27 Most research in SBCC is based on numerical simulation and lacks systematic experimental research, especially for ocean-going ships. The chemical absorption method is considered more suitable for decarbonization of ocean-going ships due to its higher decarbonization rate and lower maintenance costs.…”

Section: Introductionmentioning

confidence: 99%

“…The main size of this capture system is smaller, but the energy consumption and maintenance costs are higher, compared with the alkanol amines method. In 2023, Zhang et al studied the ability of carbon-based materials to adsorb CO 2 and analyzed the effects of CH 4 , H 2 O, NO X , etc., in ship exhaust on the decarbonization rate . Most research in SBCC is based on numerical simulation and lacks systematic experimental research, especially for ocean-going ships.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Research on the Decarbonization Performance in Ocean-Going Ship Exhaust Based on the Seawater–Sodium Hydroxide Method

Qu,

Kong,

Zhou

et al. 2024

Energy Fuels

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Reducing CO 2 emissions in the international shipping industry is crucial for mitigating global warming. International Maritime Organization (IMO) has set a decarbonization target of reducing CO 2 emissions in the international shipping industry by at least 70% compared to the 2008 level by 2040. Ship-based carbon capture (SBCC) is an effective technology for reducing CO 2 emissions from ocean-going ships. The core of SBCC is efficient and low-cost absorption solutions. In this paper, based on the exhaust emission characteristics of ocean-going ships, the seawater− sodium hydroxide method for decarbonization in ocean-going ships is developed for the first time. First, the decarbonization performance of the seawater−sodium hydroxide absorption solution is investigated, including the influence of NaOH concentration, absorption solution flow rate, and CO 2 volume concentration on the decarbonization process. The results show that the seawater−sodium hydroxide absorption solution can efficiently capture CO 2 from ship exhaust. For the ship exhaust with 9 vol % CO 2 , when the absorption solution flow rate is 0.75 L/h, the decarbonization rate reaches 51.80% using the seawater−sodium hydroxide absorption solution with 1.5 mol/L NaOH. When the NaOH concentration increases to 2.5 mol/L, the decarbonization rate increases to 83.38%. Furthermore, TiO 2 nanoparticles are added to the absorption solution to investigate optimization schemes for decarbonization of the seawater−sodium hydroxide solution. The influence of nanoparticle mass concentration and size on decarbonization is studied, and the optimization parameters of the seawater−sodium hydroxide method are obtained. With 0.09 wt % of 30 nm TiO 2 in seawater−sodium hydroxide absorption solution with 1.5 mol/L NaOH, the maximum enhancement factor (E) is 1.78, achieving the maximum decarbonization rate of 92.35% for ship exhaust containing 9 vol % CO 2 . The seawater−sodium hydroxide method is a feasible and cost-effective method to reduce CO 2 emissions in ocean-going ships. The experimental results provide a valuable reference for the application of the seawater−sodium hydroxide method in ocean-going ship decarbonization and lay an important foundation for further research on SBCC technology.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Research on the Decarbonization Performance in Ocean-Going Ship Exhaust Based on the Seawater–Sodium Hydroxide Method

Qu,

Kong,

Zhou

et al. 2024

Energy Fuels

View full text Add to dashboard Cite

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Mechanistic investigation of ammonia adsorption and reforming over Ni, Ru loaded catalysts toward green H2 production of marine engines: DFT calculation and experimental evaluation

Zhang,

Li,

Zhang

et al. 2024

Journal of Alloys and Compounds

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Study on Shipboard Carbon Capture Technology with the MEA-AMP-Mixed Absorbent Based on Ship Applicability Perspective

Zhou,

Zhang,

Jiang

et al. 2024

ACS Omega

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Ocean-going ships powered by diesel engines were the main source of CO2 emissions in the marine environment, and it was imperative to study shipboard carbon capture technology. Based on this, the whole process of CO2 absorption and desorption was studied with a mixed amine (MEA + AMP). The effective cycle time, CO2 absorption capacity, desorption efficiency, energy consumption, foaming and volatilization characteristics, and other key parameters were compared and analyzed under the conditions of required capture efficiency by ships. The MEA20% + AMP10% solution showed good CO2 absorption performance. At 80% capture efficiency, the desorption efficiency was more than 50%. The absorption capacity was close to that of the MEA30% solution, and the cycle time was basically the same. The effective cycle time under the reaction time of 2 s was also determined, which was an important parameter for setting the desorption frequency and had a great effect on reducing the desorption energy consumption. This work can provide an important reference value for the real ship application of carbon capture devices.

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Insights into CO2 removal mechanism via the carbonaceous surface in the exhaust gas of marine NG engines: A first-principles study

Cited by 6 publications

References 42 publications

Experimental Research on the Decarbonization Performance in Ocean-Going Ship Exhaust Based on the Seawater–Sodium Hydroxide Method

Experimental Research on the Decarbonization Performance in Ocean-Going Ship Exhaust Based on the Seawater–Sodium Hydroxide Method

Mechanistic investigation of ammonia adsorption and reforming over Ni, Ru loaded catalysts toward green H2 production of marine engines: DFT calculation and experimental evaluation

Study on Shipboard Carbon Capture Technology with the MEA-AMP-Mixed Absorbent Based on Ship Applicability Perspective

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