Special Issue Information

Dear Colleagues,

HYPOTHESIS, the series conference on HYdrogen POwer THeoretical and Engineering Solutions, every year goes around the world to share the latest knowledge developed in the field of hydrogen and its related technologies. This year HYPOTHESIS XIII will be held for the first time in Asia, in Singapore.

With these premises, authors and readers of this ChemEngineering Special Issue on HYPOTHESIS XIII are part of this enthusiastic community.

Dr. Massimiliano Lo Faro
Dr. Pietro Staiti
Dr. Orazio Di Blasi
Dr. Sabrina Campagna Zignani
Guest Editors

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Keywords

hydrogen
fuel cell
energy system
energy policy
national programs
international programs
catalysts, electrocatalysts
electrolysis, reforming, membranes, infrastructure, refueling
storage, modelling, simulation, nanomaterials
safety
power to gas

Published Papers (2 papers)

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Research

15 pages, 1669 KiB

Open AccessArticle

Illustrative Case Study on the Performance and Optimization of Proton Exchange Membrane Fuel Cell

by Yuan Yuan, Zhiguo Qu, Wenkai Wang, Guofu Ren and Baobao Hu

ChemEngineering 2019, 3(1), 23; https://doi.org/10.3390/chemengineering3010023 - 02 Mar 2019

Cited by 8 | Viewed by 4717

Abstract

Modeling is a powerful tool for the design and development of proton exchange membrane fuel cells (PEMFCs). This study presents a one-dimensional, two-phase mathematical model of PEMFC to investigate the two-phase transport process, gas species transport flow and water crossover fluxes. The model reduces the computational time for PEMFC design with guaranteed accuracy. Analysis results show that the concentration and activation overpotentials of the cell decrease with the increase of operation pressure, which result in enhanced cell performance. Proper oxygen stoichiometry ratio in the cathode decreases the cell activation overpotential and is favorable for performance improvement. The cell ohmic resistance correspondingly increases with the increase of catalyst layer thickness, which leads to a deteriorated cell performance. The improvement on cell performance could be facilitated by decreasing the membrane thickness. Predicted results show that the present model is a useful tool for the design optimization of practical PEMFCs. Full article

(This article belongs to the Special Issue 2018 HYPOTHESIS XIII: Hydrogen Power Theoretical and Engineering Solutions International Symposium)

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13 pages, 3140 KiB

Open AccessArticle

Experimental Demonstration and Validation of Hydrogen Production Based on Gasification of Lignocellulosic Feedstock

by Jürgen Loipersböck, Markus Luisser, Stefan Müller, Hermann Hofbauer and Reinhard Rauch

ChemEngineering 2018, 2(4), 61; https://doi.org/10.3390/chemengineering2040061 - 11 Dec 2018

Cited by 9 | Viewed by 5767

Abstract

The worldwide production of hydrogen in 2010 was estimated to be approximately 50 Mt/a, mostly based on fossil fuels. By using lignocellulosic feedstock, an environmentally friendly hydrogen production route can be established. A flow sheet simulation for a biomass based hydrogen production plant was published in a previous work. The plant layout consisted of a dual fluidized bed gasifier including a gas cooler and a dust filter. Subsequently, a water gas shift plant was installed to enhance the hydrogen yield and a biodiesel scrubber was used to remove tars and water from the syngas. CO₂ was removed and the gas was compressed to separate hydrogen in a pressure swing adsorption. A steam reformer was used to reform the hydrocarbon-rich tail gas of the pressure swing adsorption and increase the hydrogen yield. Based on this work, a research facility was erected and the results were validated. These results were used to upscale the research plant to a 10 MW fuel feed scale. A validation of the system showed a chemical efficiency of the system of 60% and an overall efficiency of 55%, which indicates the high potential of this technology. Full article

(This article belongs to the Special Issue 2018 HYPOTHESIS XIII: Hydrogen Power Theoretical and Engineering Solutions International Symposium)

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