Microalgal hydrogen production – A review

TL;DR: This Review considers several aspects of the most prominent sustainable organicsolvents in use today, ionic liquids, deep eutectic solvents, supercritical fluids, switchable solVents, liquid polymers, and renewable solvent, giving a more complete picture of the current status of sustainable solvent research and development.

TL;DR: In this paper, a brief overview of availability of hydrogen, its properties and possible sources and its production methods, and its relationship with renewable energy utilisation, environment and climate is presented.

TL;DR: This review critically examines the various studies in literature that have explored nanoparticles in biofuel processes such as biohydrogen, biogas, biodiesel and bioethanol production, towards enhancing their process yields and elucidates the different types of nanomaterials that have been used in these bioprocesses.

TL;DR: In this article, the authors examine the full range of industries and industrial processes for which hydrogen can support decarbonization and the technical, economic, social and political factors that will impact hydrogen adoption.

Abstract: Concern over sustainability of fossil fuel use is raised due to depleting fuel resources and emitting greenhouse gases (GHGs) from it. Among many alternative energy sources, biofuels, natural gas, hydrogen, and synthesis gas (syngas) emerge as four strategically important sustainable energy sources. As hydrogen gas is renewable, it does not evolve GHGs, and releases large amount of energy in combustion of unit weight and hydrogen can also be easily converted into electricity by fuel cell. It could be a strong candidate for future alternate energy resource. Biological H 2 production delivers clean H 2 in sustainable manner with simple technology and more attractive potential than the current chemical production of H 2 . Although present industrial hydrogen production system is based on chemical processing units, research trend on biohydrogen promises a deafening potential of industrial biohydrogen production in the near future.

TL;DR: It is demonstrated that the photosynthetic ferredoxin (PetF) is essential for efficient electron transfer between photosystem I and HydA1 and mapping of relevant HydA 1 and PetF residues constitutes an important basis for manipulating the physiological Photosynthetic electron flow in favor of light-driven H2 production.

TL;DR: The results support that the hydrogenase as well as the quinol oxidase function as electron valves under low oxygen concentrations, and nitrate assimilation was found to be an important electron sink.

TL;DR: It is concluded that the bidirectional hydrogenase in cyanobacteria primarily functions as a redox regulator for maintaining a proper oxidation/reduction state in the cell.