This
study presented a possible alternative to producing hydrogen
and power on the basis of different chemical looping combustion technologies.
To manifest the feasibility of such a design, the thermodynamics,
environment, and economy were assessed in this study. Compared with
traditional standalone systems (production of hydrogen and power,
respectively), the designed systems were capable of saving beyond
16% of energy input, while reducing more than 98% CO2 emissions.
As promoted by thermodynamic benefits, the chemical looping hydrogen
generation (CLHG) system could achieve 3.04% efficiency gain as compared
with the system that employs chemical looping combustion to generate
heat for the steam methane reforming process (CLC-SMR). Moreover,
the CO2 emissions per unit output energy of the presented
method were reduced by 0.09 kg. It is noteworthy that the manufacture
of oxygen carrier (OC) could not significantly impact life cycle carbon
emissions or hydrogen production costs. To reveal the irreversible
distributions, component irreversible analysis was conducted. To delve
into the feasibility of the design, a sensitivity analysis was also
conducted to explore the relationship between the OC performance and
the global warming impact. Furthermore, financial assessment was also
employed to analyze the systems’ economic benefits.
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