Publications

This study investigates the application of compact heat exchangers for the purpose of intercooling and recuperation systems for short-to-medium range aircraft equipped with hydrogen-fueled turbofan engines. The primary objective is to assess the potential effects of engine-integrated compact heat exchangers on fuel consumption and emissions. The paper encompasses the conceptual design of integrated heat exchangers and associated duc Read More

At scale biomass-based fuels are seen as long-term alternatives to conventional shipping fuels to reduce greenhouse gas emissions in the maritime sector. While the operational benefits of renewable methanol as a marine fuel are well-known its cost and environmental performance depend largely on production method and geographic context. In this study a techno-economic and environmental assessment of renewable methanol produced by gasification Read More

A 10 kW PEMFC (polymer exchange membrane fuel cell) stack consisting of two 5 kW modules (A) and (B) connected in series with a multi-function controller unit was constructed and tested. The electrical performance of the V-shaped PEMFC stack was investigated under constant and variable electrical load. It was found that the PEMFC stack was capable of supplying the required 10 kW of electrical power. An optimised purification process via ‘purge’ or humi Read More

Liquid organic hydrogen carriers (LOHC) are a technology that allows storing hy-drogen in a safe and dense manner by reversible chemical conversion. They consti-tute a very promising option for energy storage transport and release combined withelectric power generation by fuel cells in large-scale applications like trains. In orderto establish trains running on LOHC it is mandatory to ensure the reliability of thesystem. This study evaluates various system c Read More

Hydrogen energy as clean and efcient energy is considered signifcant support for the construction of a sustainable society in the face of global climate change and the looming energy revolution. Hydrogen is one of the most important chemical substances on earth and can be obtained through various techniques using renewable and nonrenewable energy sources. However the necessity for a gradual transition to renewable energy sources signif Read More

In the energy transition from fossil fuels to renewables hydrogen is a realistic alternative to achieving the decarbonization target. However its chemical and physical properties make its storage and transport expensive. To ensure the cost-effective H2 usage as an energy vector other chemicals are getting attention as H2 carriers. Among them ammonia is the most promising candidate. The value chain of NH3 as a H2 carrier considering the long-dist Read More

The exploration and evaluation of new composites possessing both processability and enhanced hydrogen storage capacity are of signifcant interest for onboard hydrogen storage systems and fuel cell based electric vehicle development. Here we demonstrate the fabrication of composite membranes with sufcient mechanical properties for enhanced hydrogen storage that are based on a polymer of intrinsic microporosity (PIM-1) matrix containing n Read More

Integrated steelworks off-gases are generally exploited to produce heat and electricity. However further valorization can be achieved by using them as feedstock for the synthesis of valuable products such as methane and methanol with the addition of renewable hydrogen. This was the aim of the recently concluded project entitled “Intelligent and integrated upgrade of carbon sources in steel industries through hydrogen intensified synthesis process Read More

The automotive industry sees hydrogen-powered fuel cell(FC) drives as a promising option with a high range and shortrefueling time. Current research aims to increase the profitabil-ity of the fuel cell system by reducing hydrogen consumption.This study suggests the use of an electrochemical hydrogencompressor (EHC) for hydrogen recirculation. Compared tomechanical compressors the EHC is very efficient due to thealmost isotherma Read More

Underground hydrogen storage in depleted hydrocarbon reservoirs and aquifers has been proposed as a potential long-term solution to storing intermittently produced renewable electricity as the subsurface formations provide secure and large storage space. Various phenomena can lead to hydrogen loss in subsurface systems with the key cause being the trapping especially during the withdrawal cycle. Capillary trapping in particular is strongly related Read More