Seyed Ehsan Hosseini

TL;DR: In this article, the state-of-the-art hydrogen production technologies using renewable and sustainable energy resources are presented, including supercritical water gasification (SCWG) of biomass is the most cost effective thermochemical process.

Abstract: The hazardous effects of pollutants from conventional fuel vehicles have caused the scientific world to move towards environmentally friendly energy sources. Though we have various renewable energy sources, the perfect one to use as an energy source for vehicles is hydrogen. Like electricity, hydrogen is an energy carrier that has the ability to deliver incredible amounts of energy. Onboard hydrogen storage in vehicles is an important factor that should be considered when designing fuel cell vehicles. In this study, a recent development in hydrogen fuel cell engines is reviewed to scrutinize the feasibility of using hydrogen as a major fuel in transportation systems. A fuel cell is an electrochemical device that can produce electricity by allowing chemical gases and oxidants as reactants. With anodes and electrolytes, the fuel cell splits the cation and the anion in the reactant to produce electricity. Fuel cells use reactants, which are not harmful to the environment and produce water as a product of the chemical reaction. As hydrogen is one of the most efficient energy carriers, the fuel cell can produce direct current (DC) power to run the electric car. By integrating a hydrogen fuel cell with batteries and the control system with strategies, one can produce a sustainable hybrid car.

TL;DR: In this paper, the authors evaluated renewable energy potentials from various resources in Iran and found that bioenergy generation from waste materials can play a crucial role in sustainability of waste management strategies.

TL;DR: Although it is too early to judge how profound the negative effects of the pandemic on the global renewable and sustainable energy systems will be, a significant short-run contraction to the development of renewables is inevitable and the energy and climate policies may require to be restructured based on the new circumstances.