Abstract
Hydrogen technology is becoming ever more relevant because hydrogen use can help in containing greenhouse gas emission if CO2 capture and storage technologies are implemented in the hydrogen production pathway (when hydrogen is produced from fossil fuels). This work aims at carrying out a comparative analysis of possible energy scenarios in urban districts. A medium-small Italian city is considered as a reference case, and its energy consumption both for domestic and industrial use is evaluated. The current situation in which conventional technologies meet the energy needs is compared with a hypothetical scenario where hydrogen is largely used. Two options of hydrogen production from commercially ready technologies are investigated: coal gasification and steam methane reforming, as well as hydrogen use in advanced energy systems for transports and for thermal and electric energy generations. Also, the environmental impacts are evaluated. This study is particularly focused on greenhouse gas emissions with specific reference to carbon dioxide. The final goal is to define an alternative scenario, quantifying the energy needs and the relative environmental impacts in order to obtain quantitative information on the environmental benefits of the hydrogen scenario, as well as to identify its possible structural and functional criticalities.
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