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Changes in higher heating value and ash content of seaweed during ensiling (2016)
Journal Article
Redden, H., Milledge, J. J., Greenwell, H. C., Dyer, P. W., & Harvey, P. J. (2017). Changes in higher heating value and ash content of seaweed during ensiling. Journal of Applied Phycology, 29(2), 1037-1046. https://doi.org/10.1007/s10811-016-0975-4

A problem in the use of macroalgae for biofuel is that harvesting of seaweed is generally seasonal, and there is a need to preserve and store seaweed to supply year-round production processes. Ensiling is a widely used preservation method in agricult... Read More about Changes in higher heating value and ash content of seaweed during ensiling.

Multi-technique approach to the petrophysical characterization of Berea sandstone core plugs (Cleveland Quarries, USA) (2016)
Journal Article
Kareem, R., Cubillas, P., Gluyas, J., Bowen, L., Hillier, S., & Greenwell, H. (2017). Multi-technique approach to the petrophysical characterization of Berea sandstone core plugs (Cleveland Quarries, USA). Journal of Petroleum Science and Engineering, 149, 436-455. https://doi.org/10.1016/j.petrol.2016.09.029

Berea sandstone has been used by the petroleum industry as a representative model siliciclastic rock for a number of years. However, only incomplete data has been reported in the literature regarding its petrographic, geochemical, and petrophysical p... Read More about Multi-technique approach to the petrophysical characterization of Berea sandstone core plugs (Cleveland Quarries, USA).

Ion Adsorption at Clay Mineral Surfaces: The Hofmeister Series for Hydrated Smectite Minerals (2016)
Journal Article
Underwood, T., Erastova, V., & Greenwell, H. (2016). Ion Adsorption at Clay Mineral Surfaces: The Hofmeister Series for Hydrated Smectite Minerals. Clays and Clay Minerals, 64(4), 472-487. https://doi.org/10.1346/ccmn.2016.0640310

Many important properties of clay minerals are defined by the species of charge-balancing cation. Phenomena such as clay swelling and cation exchange depend on the cation species present, and understanding how the cations bind with the mineral surfac... Read More about Ion Adsorption at Clay Mineral Surfaces: The Hofmeister Series for Hydrated Smectite Minerals.

Rhenium uptake and distribution in phaeophyceae macroalgae, Fucus vesiculosus (2016)
Journal Article
Racionero-Gómez, B., Sproson, A., Selby, D., Gröcke, D., Redden, H., & Greenwell, H. (2016). Rhenium uptake and distribution in phaeophyceae macroalgae, Fucus vesiculosus. Royal Society Open Science, 3(5), Article 160161. https://doi.org/10.1098/rsos.160161

Owing to Rhenium (Re) having no known biological role, it is not fully understood how Re is concentrated in oil kerogens. A commonly held assumption is that Re is incorporated into decomposing biomass under reducing conditions. However, living macroa... Read More about Rhenium uptake and distribution in phaeophyceae macroalgae, Fucus vesiculosus.

Wetting Effects and Molecular Adsorption at Hydrated Kaolinite Clay Mineral Surfaces (2016)
Journal Article
Underwood, T., Erastova, V., & Greenwell, H. (2016). Wetting Effects and Molecular Adsorption at Hydrated Kaolinite Clay Mineral Surfaces. Journal of Physical Chemistry C, 120(21), 11433-11449. https://doi.org/10.1021/acs.jpcc.6b00187

In this study, classical molecular dynamics simulations have been used to understand the key interactions and surface structure of a set of organic molecules at the hydrated surfaces of the 1:1 clay mineral kaolinite. Decane, decanoic acid, and decan... Read More about Wetting Effects and Molecular Adsorption at Hydrated Kaolinite Clay Mineral Surfaces.

Insights into the Behaviour of Biomolecules on the Early Earth: The Concentration of Aspartate by Layered Double Hydroxide Minerals (2015)
Journal Article
Grégoire, B., Erastova, V., Geatches, D. L., Clark, S. J., Greenwell, H. C., & Fraser, D. G. (2016). Insights into the Behaviour of Biomolecules on the Early Earth: The Concentration of Aspartate by Layered Double Hydroxide Minerals. Geochimica et Cosmochimica Acta, 176, 239-258. https://doi.org/10.1016/j.gca.2015.12.026

The role of mineral surfaces in concentrating and facilitating the polymerisation of simple protobiomolecules during the Hadean and Archean has been the subject of much research in order to constrain the conditions that may have led to the origin of... Read More about Insights into the Behaviour of Biomolecules on the Early Earth: The Concentration of Aspartate by Layered Double Hydroxide Minerals.

Geochemical and lithological controls on a potential shale reservoir: Carboniferous Holywell Shale, Wales (2015)
Journal Article
Newport, L. P., Aplin, A. C., Gluyas, J. G., Greenwell, H. C., & Gröcke, D. R. (2015). Geochemical and lithological controls on a potential shale reservoir: Carboniferous Holywell Shale, Wales. Marine and Petroleum Geology, 71, 198-210. https://doi.org/10.1016/j.marpetgeo.2015.11.026

The Holywell Shale is part of the Carboniferous Bowland Shale Formation, identified as the main potential shale gas system in the UK. Here, we report geochemical and petrographic data from five outcrops of the Lower and Upper Holywell Shale across no... Read More about Geochemical and lithological controls on a potential shale reservoir: Carboniferous Holywell Shale, Wales.

Towards a Mechanistic Understanding of Carbon Stabilization in Manganese Oxides (2015)
Journal Article
Johnson, K., Purvis, G., Lopez-Capel, E., Peacock, C., Gray, N., Wagner, T., …Greenwell, C. (2015). Towards a Mechanistic Understanding of Carbon Stabilization in Manganese Oxides. Nature Communications, 6, Article 7628. https://doi.org/10.1038/ncomms8628

Minerals stabilize organic carbon (OC) in sediments, thereby directly affecting global climate at multiple scales, but how they do it is far from understood. Here we show that manganese oxide (Mn oxide) in a water treatment works filter bed traps dis... Read More about Towards a Mechanistic Understanding of Carbon Stabilization in Manganese Oxides.

Understanding the Swelling Behavior of Modified Nanoclay Filler Particles in Water and Ethanol (2015)
Journal Article
Metz, S., Anderson, R. L., Geatches, D. L., Suter, J. L., Lines, R., & Greenwell, H. C. (2015). Understanding the Swelling Behavior of Modified Nanoclay Filler Particles in Water and Ethanol. Journal of Physical Chemistry C, 119(22), 12625-12642. https://doi.org/10.1021/jp512257z

Clay–polymer nanocomposite materials have gained much attention owing to their low weight ratio of filler to reinforcement properties, delivering lightweight yet resilient materials with excellent barrier properties to gas diffusion. An important pro... Read More about Understanding the Swelling Behavior of Modified Nanoclay Filler Particles in Water and Ethanol.

The effect of interbedding on shale reservoir properties (2015)
Journal Article
Raji, M., Gröcke, D., Greenwell, H., Gluyas, J., & Cornford, C. (2015). The effect of interbedding on shale reservoir properties. Marine and Petroleum Geology, 67, 154-169. https://doi.org/10.1016/j.marpetgeo.2015.04.015

North Sea oil is overwhelmingly generated in shales of the Upper Jurassic – basal Cretaceous Kimmeridge Clay Formation. Once generated, the oil is expelled and ultimately migrates to accumulate in sandstone or carbonate reservoirs. The source rock sh... Read More about The effect of interbedding on shale reservoir properties.

Molecular Dynamic Simulations of Montmorillonite-Organic Interactions under Varying Salinity: An Insight into Enhanced Oil Recovery (2015)
Journal Article
Underwood, T., Erastova, V., Cubillas, P., & Greenwell, H. (2015). Molecular Dynamic Simulations of Montmorillonite-Organic Interactions under Varying Salinity: An Insight into Enhanced Oil Recovery. Journal of Physical Chemistry C, 119(13), 7282-7294. https://doi.org/10.1021/acs.jpcc.5b00555

Enhanced oil recovery is becoming commonplace in order to maximize recovery from oil fields. One of these methods, low-salinity enhanced oil recovery (EOR), has shown promise; however, the fundamental underlying chemistry requires elucidating. Here,... Read More about Molecular Dynamic Simulations of Montmorillonite-Organic Interactions under Varying Salinity: An Insight into Enhanced Oil Recovery.

Interaction of Natural Organic Matter with Layered Minerals: Recent Developments in Computational Methods at the Nanoscale (2014)
Journal Article
Greathouse, J., Johnson, K., & Greenwell, H. (2014). Interaction of Natural Organic Matter with Layered Minerals: Recent Developments in Computational Methods at the Nanoscale. Minerals, 4(2), 519-540. https://doi.org/10.3390/min4020519

The role of mineral surfaces in the adsorption, transport, formation, and degradation of natural organic matter (NOM) in the biosphere remains an active research area owing to the difficulties in identifying proper working models of both NOM and mine... Read More about Interaction of Natural Organic Matter with Layered Minerals: Recent Developments in Computational Methods at the Nanoscale.

Monster potential meets potential monster: pros and cons of deploying genetically modified microalgae for biofuels production (2013)
Journal Article
Flynn, K., Mitra, A., Greenwell, H., & Sui, J. (2013). Monster potential meets potential monster: pros and cons of deploying genetically modified microalgae for biofuels production. Interface Focus, 3(1), https://doi.org/10.1098/rsfs.2012.0037

Biofuels production from microalgae attracts much attention but remains an unproven technology. We explore routes to enhance production through modifications to a range of generic microalgal physiological characteristics. Our analysis shows that biof... Read More about Monster potential meets potential monster: pros and cons of deploying genetically modified microalgae for biofuels production.

Influence of Surface Chemistry and Charge on Mineral-RNA Interactions (2013)
Journal Article
Swadling, J., Suter, J., Greenwell, H., & Coveney, P. (2013). Influence of Surface Chemistry and Charge on Mineral-RNA Interactions. Langmuir, 29(5), 1573-1583. https://doi.org/10.1021/la303352g

We present the results of large-scale molecular simulations, run over several tens of nanoseconds, of 25-mer sequences of single-stranded ribonucleic acid (RNA) in bulk water and at the surface of three hydrated positively charged MgAl layered double... Read More about Influence of Surface Chemistry and Charge on Mineral-RNA Interactions.

DFT+U investigation of the catalytic properties of ferruginous clay (2013)
Journal Article
Geatches, D. L., Clark, S. J., & Greenwell, H. C. (2013). DFT+U investigation of the catalytic properties of ferruginous clay. American Mineralogist, 98(1), 132-140. https://doi.org/10.2138/am.2013.4204

The formation of fossil oil within clay minerals i.e., mineral-catalyzed decarboxylation, is a mechanism awaiting a thorough chemical explanation. To contribute to such an explanation, the study presented here investigates this mechanism at the level... Read More about DFT+U investigation of the catalytic properties of ferruginous clay.