A Scientometric Analysis of Research on Bio Filtration of Waste Gas Streams During 1989-2020

Biofiltration is a superior method of pollution control technologies among the various physical, chemical and biological methods. This process uses active microorganisms and to degrade pollutants produce innocuous end products. Microbes present in the filter materials used in remove of contaminants from the air effectively. A total of 1386 bibliographic records from the Web of Science (WoS) database were extracted and analyzed to report the analysis of scientific state of the authors, journals, countries, and categories. Histcite and VoSviewer software’s are used for analyzing records. In the study, we have analyzed annual contribution, authorship pattern, type of document, language, degree of collaboration, Collaborative index, Co-author index, relative growth rate and doubling time, Bradfords law, h-index, subject wise, countries and co-occurrence keywords. The results indicate that USA and China are the most contributing countries in biofiltration. This study therefore, provides an extensive understanding about the trends and research patterns of biofilter of air efforts worldwide. Finally, research gaps and environment pollution issues are highlighted and the scope for future also discussed.

Reactive Capture Using Metal Looping: The Effect of Oxygen

In the effort to create a sustainable future economy, the ability to directly convert dilute gas-phase CO2 in waste gas streams into useful products would be a valuable tool, which...

Hydrogen Recovery from Waste Gas Streams to Feed (High-Temperature PEM) Fuel Cells: Environmental Performance under a Life-Cycle Thinking Approach

Fossil fuels are being progressively substituted by a cleaner and more environmentally friendly form of energy, where hydrogen fuel cells stand out. However, the implementation of a competitive hydrogen economy still presents several challenges related to economic costs, required infrastructures, and environmental performance. In this context, the objective of this work is to determine the environmental performance of the recovery of hydrogen from industrial waste gas streams to feed high-temperature proton exchange membrane fuel cells for stationary applications. The life-cycle assessment (LCA) analyzed alternative scenarios with different process configurations, considering as functional unit 1 kg of hydrogen produced, 1 kWh of energy obtained, and 1 kg of inlet flow. The results make the recovery of hydrogen from waste streams environmentally preferable over alternative processes like methane reforming or coal gasification. The production of the fuel cell device resulted in high contributions in the abiotic depletion potential and acidification potential, mainly due to the presence of platinum metal in the anode and cathode. The design and operation conditions that defined a more favorable scenario are the availability of a pressurized waste gas stream, the use of photovoltaic electricity, and the implementation of an energy recovery system for the residual methane stream.