Energy consumption of the electrolytic hydrogen production using Zn–Co–Mo based activators—Part I

Maslovara, Sladjana Lj.; Miulovic, Snezana M.; Kaninski, Milica P. Marčeta; Tasić, Gvozden S.; Nikolić, Vladimir M.

doi:10.1016/j.apcata.2012.09.057

Cited by 10 publications

(1 citation statement)

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“…As a matter of fact, several studies in the literature show that power consumption can reach values of 15480 kJ per Nm 3 of H 2 for alkaline technology and 14760 kJ Nm −3 for PEM technology [31]. A reduction of 10% on the alkaline electrolysis energy consumption was observed when compounds of three d-metals (ZnCoMo) were added to the standard potassium hydroxide (KOH) solution [32]. Commercial alkaline electrolyzer, supplied by Nel Hydrogen, has: (i) a declared power Fig.…”

Section: Hydrogen Productionmentioning

confidence: 99%

Flue gas treatment by power-to-gas integration for methane and ammonia synthesis – Energy and environmental analysis

Castellani

Rinaldi

Morini

et al. 2018

Energy Conversion and Management

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The present paper aims at assessing the carbon and energy footprint of an innovative process for carbon dioxide recycling, with flue gas as feedstock of nitrogen and carbon dioxide. Nitrogen is converted into ammonia through the Haber-Bosch process and carbon dioxide into methane via Sabatier reaction using hydrogen produced by renewable electricity excess. Carbon and energy footprint analysis of the process was assessed based on experimental data related to hydrogen production by electrolysis, methane synthesis via Sabatier reaction, energy consumption and energy output of the process units for flue gas separation, carbon dioxide methanation and ammonia synthesis. A Life Cycle Assessment method is applied, based on the experimental and computational data, both in case of renewable electricity excess and electricity from the grid. Results show that in case of renewable electricity excess, for a functional unit of 1 kg of treated flue gas, the specific carbon footprint is 0.7819 kg CO2eq and energy footprint is 50.73 MJ, which correspond to 4.012 kg and 260.3 MJ per 1 kg of produced hydrogen. In case of electricity from the grid, the specific carbon footprint is 1.550 kg CO2eq and energy footprint is 59.12 MJ per flue gas mass unit. If the carbon footprint is positive, the process indirectly leads to avoided emissions, ranging from 0.673 to 0.844 kg CO2eq kg −1 fluegas , thus proving the sustainability of the proposed pathway.

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Section: Hydrogen Productionmentioning

confidence: 99%