A novel integrated system for sustainable generation of hydrogen and liquid hydrocarbon fuels using the five-step ZnSI thermochemical cycle, biogas upgrading process, and solar collectors

Ghorbani, Bahram; Saharkhiz, Mohammad Hossein Monajati; Li, Jie

doi:10.1016/j.jclepro.2021.127715

Cited by 12 publications

(3 citation statements)

References 47 publications

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“…Compressors: Ẇ c = ṁ c false( h out − h in false) / η c The subscripts p, t, and c refer to pumps, turbines, and compressors involved in hybrid system, respectively; and Ẇ denotes the production/consumption power in these process components. Energy balance and mass conservation in flash drums and separators can be expressed using eqs and , respectively ṁ in h in = ṁ out 1 h out 1 + ṁ out 2 h out 2 ṁ in = ṁ out 1 + ṁ out 2 …”

Section: Methodsmentioning

confidence: 99%

Thermoeconomic Analysis of an Innovative Integrated System for Cogeneration of Liquid Hydrogen and Biomethane by a Cryogenic-Based Biogas Upgrading Cycle and Polymer Electrolyte Membrane Electrolysis

Ghorbani,

Zendehboudi,

Saady

et al. 2024

Ind. Eng. Chem. Res.

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Hydrogen (H2) as an ecofriendly alternative to fossil fuels faces challenges in storing large capacities for extended transportation due to its low volumetric energy density. Also, common large-scale storage techniques for H2 are associated with high energy consumption, which is potentially at odds with the environmental benefits. The multiproduct H2 storage systems are associated with enhancing efficiency and environmental sustainability, leading to significant cost savings and minimizing waste production. In this paper, an integrated system that cogenerates liquids H2 and biomethane is designed using low-temperature cascade refrigeration processes, cryogenic-based biogas purification cycle, proton exchange membrane (PEM) electrolysis, and organic Rankine plant. A two-stage mixed refrigerant refrigeration process is employed for purifying untreated biogas, liquefying biomethane, and precooling H2 generated by a PEM electrolyzer. Four H2 Joule-Brayton refrigeration systems are used to liquefy H2 in the hybrid system. This hybrid configuration purifies 2917 kg/h unrefined biogas and uses 27.71 MW power to produce 416.6 kg/h liquid H2 and 674 kg/h liquid biomethane. The energy and exergy efficiencies for the designed integrated process are calculated at 54.65% and 56.67%, respectively. The system exergy analysis reveals that the electrolyzer (77.94%), heat exchangers (10.61%), and compressors (5.69%) are the principal equipment in exergy destruction. Pinch analysis is employed to design heat exchanger networks and reduce energy consumption effectively. According to the economic analysis, the investment return period and the prime cost of H2 are 5.589 years and 3.539 USD/kgLH2, respectively. The parametric sensitivity analysis demonstrates that lowering the electricity cost from 0.1 to 0.03 USD/kWh leads to a decrease in the prime cost of liquid H2 and the investment return period to 2.205 USD/kgLH2 and 4.251 years, respectively. Moreover, increasing the outlet pressure of the turbo-expander in the cryogenic refrigeration cycle from 100 to 220 kPa results in an increase in exergy efficiency and net annual benefit to 56.67% and 13.89 MMUSD/year, respectively, and a reduction in the prime cost of liquid H2 to 3.536 USD/kgLH2.

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Section: Methodsmentioning

confidence: 99%

Thermoeconomic Analysis of an Innovative Integrated System for Cogeneration of Liquid Hydrogen and Biomethane by a Cryogenic-Based Biogas Upgrading Cycle and Polymer Electrolyte Membrane Electrolysis

Ghorbani,

Zendehboudi,

Saady

et al. 2024

Ind. Eng. Chem. Res.

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“…The output of the exergy analysis is in the form of exergy loss and exergy efficiency for all the components in the process. The exergy rates of each stream can be regarded by neglecting the nuclear, potential, electric, and kinetic energies as follows normalE normalx ̇ = normalE normalx ̇ normalp normalh + normalE normalx ̇ normalc normalh = ( ∑ i ṁ i false( ( h̅ i − h̅ 0 ) − T 0 ( s̅ i − s̅ 0 ) false) ) + ( ṁ i true( ∑ k x k normale normalx ̅ normalk normalc normalh true) + Δ G m i x ) …”

Section: Thermodynamic and Optimization Analysesmentioning

confidence: 99%

Section: Exergy Analysismentioning

confidence: 99%

Multi-objective Optimization of a Novel Hybrid Structure for Co-generation of Ammonium Bicarbonate, Formic Acid, and Methanol with Net-Zero Carbon Emissions

et al. 2023

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Chemical storage of hydrogen, originated from renewable energy, is one of the most efficient and reliable methods to absorb carbon dioxide (CO 2 ) and easily transport large-scale energy to remote areas. In this study, a novel integration of an electro-thermochemical process with industrial flue gas thermal energy and wind turbines is proposed to absorb CO 2 and store chemically hydrogen in the form of methanol, formic acid, and ammonium bicarbonate. The proposed hybrid structure includes a post-combustion CO 2 capture technology, a copper−chlorine thermochemical process, and several ammonium bicarbonate, formic acid, and methanol production cycles. The proposed configuration produces 2597 kg/h methanol, 5270 kg/h ammonium bicarbonate, and 833.3 kg/h formic acid. The energy and exergy efficiencies of the proposed layout are computed at 63.68 and 66.82%, respectively. The exergy analysis depicts that three processes of electro-thermochemical, methanol production, and post-combustion CO 2 capture have the greatest destructed exergy contributions among other subsections to the amounts of 40.85, 30.16, and 7.97%, respectively. The verification, validation, and sensitivity analyses, along with a multi-objective optimization protocol (i.e., a hybrid neural network and a genetic algorithm), are also used to evaluate the proposed system. The objective functions, decision variables, and constraints for the optimization phase are determined through sensitivity analysis. Several multi-criteria decision evaluation methods are employed to prioritize and choose the optimal point from the Pareto set. The electrical power supplied from the wind turbines as well as the auxiliary power supply, and the energy and exergy efficiencies calculated based on the TOPSIS/LINAMP techniques are 9.90 MW, 89.23, and 67.27%, respectively. In addition, the power consumption, energy, and exergy efficiencies at the optimal operating condition, calculated using the

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Investigation of an integrated thermochemical hydrogen production and high temperature solar thermochemical energy storage and CO2 capture process

Sami

Mehrpooya

Noorpoor

2022

Applied Thermal Engineering

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A novel integrated system for sustainable generation of hydrogen and liquid hydrocarbon fuels using the five-step ZnSI thermochemical cycle, biogas upgrading process, and solar collectors

Cited by 12 publications

References 47 publications

Thermoeconomic Analysis of an Innovative Integrated System for Cogeneration of Liquid Hydrogen and Biomethane by a Cryogenic-Based Biogas Upgrading Cycle and Polymer Electrolyte Membrane Electrolysis

Thermoeconomic Analysis of an Innovative Integrated System for Cogeneration of Liquid Hydrogen and Biomethane by a Cryogenic-Based Biogas Upgrading Cycle and Polymer Electrolyte Membrane Electrolysis

Multi-objective Optimization of a Novel Hybrid Structure for Co-generation of Ammonium Bicarbonate, Formic Acid, and Methanol with Net-Zero Carbon Emissions

Investigation of an integrated thermochemical hydrogen production and high temperature solar thermochemical energy storage and CO2 capture process

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