Darren Paul Broom

Darren Paul Broom
Hiden Isochema Ltd

BSc, MSc, PhD

About

44
Publications
16,998
Reads
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1,419
Citations
Additional affiliations
February 2004 - January 2007
European Commission, JRC Institute for Energy
Position
  • Postdoctoral Research Fellow
February 2003 - January 2004
University of Salford
Position
  • Research Assistant

Publications

Publications (44)
Article
Multicomponent absorption measurements are notoriously difficult both experimentally and analytically, which is why the literature is lacking information, even though the results are important for understanding real separation systems. In the case of designing a separation process for hydrofluorocarbon (HFC) refrigerant mixtures using an ionic liqu...
Article
Full-text available
Porous adsorbents such as zeolites and activated carbons are widely used in industrial gas separations. In order to select a material for a given separation, and to subsequently design and optimize a process, each adsorbent must be thoroughly characterized. Key performance parameters include working capacity, heats or enthalpies of adsorption, and...
Article
Full-text available
Research into new reversible hydrogen storage materials has the potential to help accelerate the transition to a hydrogen economy, as the discovery of an efficient and cost‐effective method of safely storing hydrogen would revolutionise its use as a sustainable energy carrier. Accurately measuring storage capacities, however – particularly of novel...
Article
Full-text available
To assess the performance of an adsorbent for a particular gas separation, and for process design, it is necessary to determine multicomponent gas adsorption equilibria, either experimentally or from predictions based on models or theory. The experimental techniques commonly used for this purpose, however, are time-consuming and typically require l...
Article
Full-text available
This paper reports the results of an international interlaboratory study led by the National Institute of Standards and Technology (NIST) on the measurement of high-pressure surface excess methane adsorption isotherms on NIST Reference Material RM 8850 (Zeolite Y), at 25 °C up to 7.5 MPa. Twenty laboratories participated in the study and contribute...
Preprint
Multicomponent gas adsorption equilibria must be determined in order to assess the performance of an adsorbent for a particular gas separation and for process design. The experimental techniques commonly used for this purpose, however, are time-consuming and typically require large samples. In this article, we describe a new approach, called the In...
Article
Full-text available
Globally, the accelerating use of renewable energy sources, enabled by increased efficiencies and reduced costs, and driven by the need to mitigate the effects of climate change, has significantly increased research in the areas of renewable energy production, storage, distribution and end-use. Central to this discussion is the use of hydrogen, as...
Preprint
Full-text available
Magnesium hydride owns the largest share of publications on solid materials for hydrogen storage. The Magnesium group of international experts contributing to IEA Task 32 Hydrogen Based Energy Storage recently published two review papers presenting the activities of the group focused on magnesium hydride based materials and on Mg based compounds fo...
Article
Full-text available
Hydrogen storage in nanoporous materials has been attracting a great deal of attention in recent years, as high gravimetric H2 capacities, exceeding 10 wt% in some cases, can be achieved at 77 K using materials with particularly high surface areas. However, volumetric capacities at low temperatures, and both gravimetric and volumetric capacities at...
Article
Full-text available
The original version of this article was published open access. Unfortunately, due to a technical issue, the copyright holder name in the online version (HTML and XML) is incorrectly published as “Springer Science+Business Media, LLC, part of Springer Nature 2018”. Instead, it should be “The Author(s) 2018”.
Chapter
Gases such as hydrogen and methane are conventionally stored using either compression or liquefaction. However, both approaches have limitations, which include the sophisticated hardware required for containment and the energetic cost of compressing or liquefying the gas. A potentially more efficient alternative is to use adsorption in highly porou...
Article
Full-text available
This paper reports the results of an international interlaboratory study led by the National Institute of Standards and Technology (NIST) on the measurement of high-pressure surface excess carbon dioxide adsorption isotherms on NIST Reference Material RM 8852 (ammonium ZSM-5 zeolite), at 293.15 K (20 °C) from 1 kPa up to 4.5 MPa. Eleven laboratorie...
Article
Full-text available
Pressure-swing adsorption (PSA) and temperature-swing adsorption (TSA) separate a specific gas species from a mixture of gases. This article explains how to evaluate the performance of an adsorbent for a given separation.
Article
Characterising the hydrogen sorption properties of materials is important for a range of applications, including solid state hydrogen storage, electrochemical and thermal energy storage using metal hydrides, and H2 gas compression and purification. However, it can be technically demanding and subject to significant error if not performed with care....
Article
Separations account for a large proportion of the world’s energy consumption. Energy-intensive distillation plays an important role, yet more efficient solutions are available, including using membranes and porous adsorbents. The latter, in particular, are widely used for gases in the form of pressure swing adsorption (PSA) and temperature swing ad...
Article
Issues regarding the gap between the initial characterization performed when new materials are reported in the open literature and the characterization needed to assess the potential of a new material for industrial gas separation applications are examined. Practical processes include air separation for O2 and N2 production, natural gas upgrading,...
Article
Full-text available
The storage of hydrogen in materials has received a significant amount of attention in recent years because this approach is widely thought to be one of the most promising solutions to the problem of storing hydrogen for use as an alternative energy carrier in a safe, compact and affordable form. However, there have been a number of high profile ca...
Article
Adsorption is widely used to separate and purify gases. Process design and optimisation plays a crucial role in the practical implementation of this technology, but laboratory scale studies are required in order to initially assess the suitability of new materials for practical use. Preliminary analytical measurements can be made with pure gases; f...
Article
Full-text available
Considerable progress has been made recently in the use of nanoporous materials for hydrogen storage. In this article, the current status of the field and future challenges are discussed, ranging from important open fundamental questions, such as the density and volume of the adsorbed phase and its relationship to overall storage capacity, to the d...
Chapter
This chapter covers hydrogen storage in nanoporous materials, which is one of the options currently being considered for automotive or mobile applications. It first introduces the principles behind hydrogen adsorption by these materials and the methods used to characterise their hydrogen storage properties. It then provides an overview of the diffe...
Article
In this chapter, we discuss many of the practical issues that can affect the accuracy of gas phase hydrogen sorption measurement techniques. We begin with some relevant properties of gaseous hydrogen, such as the description of its compressibility as a function of temperature and pressure, the Joule–Thomson effect, thermal conductivity and the gas...
Article
Full-text available
There are numerous applications of nanoporous materials, including gas storage, separation, and purification. In recent years, the number of available nanoporous materials has increased substantially, with new material classes, such as metal-organic frameworks and microporous organic polymers, joining the traditional adsorbents, which include activ...
Chapter
The accurate determination of the gas sorption properties of a carbon nanomaterial is a prerequisite to the assessment of its suitability for use in practical gas sorption applications. Over the last decade or so, the hydrogen sorption properties of some nanostructured carbons, including nanotubes and nanofibres, have been the subject of controvers...
Article
Porous materials adsorb H2 through physisorption, a process which typically has a rather low enthalpy of adsorption (e.g. ca. 4 to 7 kJ mol(-1) for MOFs), thus requiring cryogenic temperatures for hydrogen storage. In this paper, we consider some of the issues associated with the accurate characterisation of the hydrogen adsorption properties of mi...
Article
In this chapter we cover some of the common complementary techniques used for hydrogen storage material characterisation. We begin with thermal analysis and calorimetry, which can be used to determine the thermodynamic properties that can also be measured using hydrogen sorption techniques, as well as activation energies and characteristic temperat...
Article
In this chapter we introduce the main gas sorption techniques applied to the characterisation of the hydrogen sorption properties of potential hydrogen storage materials. We begin with volumetric techniques, with a focus on the commonly used manometric (Sieverts’) method, but also cover some of the alternative approaches, such as the flowing and di...
Article
In this chapter we examine the hydrogen sorption properties of materials, considering both the parameters that are of prime practical engineering importance, and the thermodynamic and kinetic properties of interest for future materials development. We begin with the practical storage properties, such as the reversible storage capacity, including de...
Article
This chapter presents an overview of the various materials that are currently being considered as potential solid state storage media. We concentrate on the physical and chemical properties of the materials relevant for the characterisation of their hydrogen storage properties and their practical use in storage devices, as opposed to the materials...
Article
Computational modelling is a powerful tool for the study of gas–solid interactions, and can be used both to complement experiment and design new materials. For the modelling of gas adsorption by nanoporous media, a multiscale approach can be used, in which the molecular force fields required for Grand Canonical Monte Carlo (GCMC) simulations are de...
Conference Paper
The study of the kinetics of competitive adsorption of multicomponent gaseous mixtures on a solid adsorbent is important for a range of practical adsorptive processes. One such environmental application is carbon capture and storage (CCS), which includes the use of geological CO2 storage methods as well as the pre-combustion capture of CO2 from syn...
Article
A porous coordination framework material, Zn4O(BDC)(BTB)4/3 (labeled 1 for simplification), has been prepared and applied to hydrogen storage. Its storage capacity has been measured, and the absolute and excess H2 adsorption uptakes reach 6.23 and 5.43 wt % at 77 K and 20 bar, respectively. Moreover, a multiscale simulation method, which combines f...
Article
The most common gas phase hydrogen sorption measurement techniques used for the characterisation of potential hydrogen storage materials are the volumetric, or manometric, and gravimetric methods and temperature-programmed desorption (TPD), also known as thermal desorption spectroscopy (TDS). In this article previous work relating to the accuracy o...
Article
The accuracy of gas phase sorption measurements performed on potential hydrogen storage materials has been the subject of much controversy in recent years, particularly in the case of adsorption by carbon nanostructures. As the technological interest in the solid state storage of hydrogen increases, it has become increasingly necessary to investiga...
Article
The YCo3–H system is an interesting system, which shows a dramatic influence of hydrogen absorption on its magnetic properties. The β-hydride phase has been divided into β1 and β2 phases originally due to their different magnetic properties. Our measurement of the absorption isotherm at room temperature, however, shows clearly that the β phase is a...
Article
A number of cubic C15 Laves phase intermetallic compounds are able to absorb large amounts of hydrogen. At low solute concentrations, the protons occupy tetrahedral interstitial sites, which form a network of hexagons. It is believed that the motion of hydrogen occurs on two distinct time-scales; a rapid localised motion around the hexagons, couple...
Article
Full-text available
We report here on the nature of the twinning associated with the tetragonal to orthorhombic I (T/OI) phase transition in YBCO, for temperatures between 500 and 600ºC. In situ neutron diffraction measurements show the coexistence of the T and split OI peaks in the vicinity of the transition. However, by direct numerical simulation, we show that this...
Article
The magnetic properties of two commercial LaNi5-based materials and their variation as a function of hydrogen cycles have been studied using magnetisation measurements. Pure LaNi5 is a Pauli paramagnet, but it has been shown that after hydrogen cycling Ni clusters are formed on its surface. At room temperature these clusters were found to act as su...
Article
The pore size distribution (PSD) of an activated carbon has been determined by the analysis of a CO 2 adsorption isotherm measured at 273 K using a Hiden Isochema IGA- 001 Intelligent Gravimetric Analyser. The data were analysed in the Hiden Isochema IGASwin software package and the PSD that was obtained shows a maximum at a pore dimension of appro...

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