Valorization of food waste into hydrogen: Energy potential, economic feasibility and environmental impact analysis

Abstract

Hydrogen gas is widely acknowledged as a significant energy carrier worldwide. Hydrogen gas derived from sustainable sources could be used as an alternative to fossil fuel for electricity generation with zero emission of hazardous pollutants. Food waste valorization to hydrogen is a viable energy source with potential economic benefits. The current study examines the economic viability and environmental effect of producing hydrogen from food waste in China using biogas steam reforming for power generation. The key findings show that the steam reforming of biogas from food waste could produce 221.12 billion kg of hydrogen gas. The quantity of hydrogen gas yield could generate 661.97 TWh of electricity. It was found that the consumption of the available electricity from the hydrogen gas could displace 15,482.26 M liters of diesel fuel combustion. The amount of diesel fuel consumption avoided can reduce global warming by 42,041.90 kt CO2e. It was also discovered that hydrogen has an appealing ecological efficiency of 94.64% when used as a source of energy generation. According to the outcomes of the economic analysis, the food waste to hydrogen project is economically feasible in all of China's provinces. The average hydrogen production cost, return on investment, the payback period is $0.814/kWh, 29.8%, and 7.2 years. This study could provide scientific data for investment and decision-making on ecological sustainability in food waste to hydrogen initiatives in China and other emerging nations with a similar culture.