Thermodynamic assessment of a lab-scale experimental copper-chlorine cycle for sustainable hydrogen production

Farsi, Aida; Zamfirescu, Calin; Dinçer, İbrahim; Naterer, G.F.

doi:10.1016/j.ijhydene.2019.04.177

Cited by 56 publications

(21 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The main advantages of Cu-Cl cycle are low-temperature requirements (530 °C) and can be easily coupled with low-grade heat sources from nuclear or solar sources. Cu-Cl cycle consists of the following four steps [18]: electrochemical step for H 2 evolution (Eq. 1.1), drying of aqueous CuCl 2 (Eq.…”

Section: Introductionmentioning

confidence: 99%

Cu–Cl Thermochemical Water Splitting Cycle: Probing Temperature-Dependent CuCl2 Hydrolysis and Thermolysis Reaction Using In Situ XAS

Singh

Pai

Banerjee

et al. 2021

J Therm Anal Calorim

View full text Add to dashboard Cite

Recently, we reported detailed investigations on a hydrolysis step of Cu-Cl thermochemical cycle (Singh et al. in Int J Energy Res 44:2845-2863 where we demonstrated CuCl 2 hydrolysis using a fixed-bed reactor under optimized conditions. Thermolysis of CuCl 2 and oxide formation are associated hindrances in achieving 100% phase-pure hydrolysis product, Cu 2 OCl 2 . With an objective to understand the thermolysis and hydrolysis processes at molecular level, both these reactions were investigated independently in the present study using in situ XAS as a probe. The progress of both the reactions was recorded from RT to 400 °C by monitoring temperature-dependent evolution of Cu species using Cu K-edge XAS measurements at BL-09, Indus-2 SRS, RRCAT, Indore, India. XAS results are also corroborated with ex situ analysis by XRD and TG of samples containing various compositions of CuCl 2 mixed with boron nitride (pellets employed for XAS). Besides LCF, hydrolysis product Cu 2 OCl 2 yield was further supported by chemical titrations. EXAFS revealed that with increasing temperature, coordination of Cu atoms in reactant CuCl 2 progressively decreased during thermolysis. For hydrolysis process, coordination of Cu atoms in Cu-Cu, Cu-O and Cu-Cl linkages approached towards that of Cu 2 OCl 2 and CuO. CuCl 2 diminished and transformed into CuCl (88 mass%) at 350 °C during thermolysis and ~ 60 mass% of Cu 2 OCl 2 and 40 mass% of CuO during hydrolysis reaction. Based on in situ investigations in the present study, the most probable reactions taking place during CuCl 2 hydrolysis at different temperatures are proposed for S/Cu of 14.6.

show abstract

Section: Introductionmentioning

confidence: 99%

Cu–Cl Thermochemical Water Splitting Cycle: Probing Temperature-Dependent CuCl2 Hydrolysis and Thermolysis Reaction Using In Situ XAS

Singh

Pai

Banerjee

et al. 2021

J Therm Anal Calorim

View full text Add to dashboard Cite

show abstract

“…A thermodynamic assessment of the lab-scale Cu-Cl cycle was presented in a previous study, 1 however, this did not…”

Section: Exergo-economic Analysis Resultsmentioning

confidence: 99%

Exergo‐economic assessment by a specific exergy costing method for an experimental thermochemical hydrogen production system

Farsi

Dinçer

Naterer

2021

Intl J of Energy Research

Self Cite

View full text Add to dashboard Cite

In this article, an exergo-economic study of an experimental lab-scale integrated copper-chlorine (Cu-Cl) cycle of hydrogen production is conducted. The analysis is performed based on a specific exergy costing (SPECO) method to determine the influences of various design criteria on the costs and then identify possible improvements for more cost effective approaches. The article includes an exergy analysis, economic study, exergy costing and exergoeconomic evaluation. Also, a scale-up analysis is performed to predict the cost of a larger scale facility of 1000 kg per day of hydrogen production. The results of the exergo-economic and scale-up analysis are expected to assist in the design, optimization and improvement of a scaled-up Cu-Cl thermochemical cycle. Furthermore, the results of this study show that for a large-scale Cu-Cl cycle plant with a capacity of 1000 kg/day H 2 , the cost of hydrogen production, excluding the treatment of side reactions, is predicted at about 3.

show abstract

“…The thermodynamic performance of a lab‐scale Cu‐Cl thermochemical cycle for hydrogen production has determined the overall energy and exergy efficiencies to be 11.6% and 34.9%, respectively. Moreover, the highest exergy losses have taken place in thermolysis and hydrolysis reactors 16 . The thermodynamic operation of the three configurations of the Cu‐Cl thermochemical cycle for hydrogen production has been evaluated 19 .…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the highest exergy losses have taken place in thermolysis and hydrolysis reactors. 16 The thermodynamic operation of the three configurations of the Cu-Cl thermochemical cycle for hydrogen production has been evaluated. 19 The outcomes demonstrate that the four-step cycle with 41.9% and 75.5% has the highest energy and exergy efficiencies compared to the three-step and five-step configurations.…”

mentioning

confidence: 99%

Hydrogen production by thermochemical water splitting cycle using low‐grade solar heat and phase change material energy storage system

Mehrpooya

Ghorbani

Khodaverdi

2022

Intl J of Energy Research

View full text Add to dashboard Cite

Summary In this research, a novel integrated system for renewable hydrogen production, power, and hot water from solar thermal energy has been developed and precisely evaluated in terms of thermodynamics. The developed structure is comprised of a four‐step Cu‐Cl thermochemical cycle, and an organic Rankine cycle to generate electricity. The required heat is supplied by a concentrated solar power plant and thermal energy storage based on latent heat. Also, a high‐temperature heat pump is employed to improve the thermal grade of working fluid and provide each unit with sufficient heat. System dynamics simulation has been performed using weather and irradiation input data of Tehran, Iran. The integrated structure has the capability to produce 21.75 kg/h of hydrogen, 563.6 kW of electricity, and 393.3 m3/h of hot water at 70°C. The energy efficiency of the system reaches more than 80% based on higher heating value and the solar‐to‐fuel efficiency has a value of 25.8%. Moreover, an exergy analysis has been executed to determine the fundamental operating parameters of each component and the whole structure. The total exergy efficiency of the integrated structure is 34.23%, and the prime cost of the product is found to be 5.795 USD/kg H2.

show abstract

Thermodynamic assessment of a lab-scale experimental copper-chlorine cycle for sustainable hydrogen production

Cited by 56 publications

References 30 publications

Cu–Cl Thermochemical Water Splitting Cycle: Probing Temperature-Dependent CuCl2 Hydrolysis and Thermolysis Reaction Using In Situ XAS

Cu–Cl Thermochemical Water Splitting Cycle: Probing Temperature-Dependent CuCl2 Hydrolysis and Thermolysis Reaction Using In Situ XAS

Exergo‐economic assessment by a specific exergy costing method for an experimental thermochemical hydrogen production system

Hydrogen production by thermochemical water splitting cycle using low‐grade solar heat and phase change material energy storage system

Contact Info

Product

Resources

About