All Outputs (44)

Shale gas reserve evaluation by laboratory pyrolysis and gas holding capacity consistent with field data (2019)
Journal Article
Whitelaw, P., Uguna, C. N., Stevens, L. A., Meredith, W., Snape, C. E., Vane, C. H., …Carr, A. D. (2019). Shale gas reserve evaluation by laboratory pyrolysis and gas holding capacity consistent with field data. Nature Communications, 10(1), Article 3659. https://doi.org/10.1038/s41467-019-11653-4

Exploration for shale gas occurs in onshore basins, with two approaches used to predict the maximum gas in place (GIP) in the absence of production data. The first estimates adsorbed plus free gas held within pore space, and the second measures gas y... Read More about Shale gas reserve evaluation by laboratory pyrolysis and gas holding capacity consistent with field data.

Selective low temperature chemical looping combustion of higher alkanes with Cu- and Mn- oxides (2019)
Journal Article
Güleç, F., Meredith, W., Sun, C., & Snape, C. E. (2019). Selective low temperature chemical looping combustion of higher alkanes with Cu- and Mn- oxides. Energy, 173, 658-666. https://doi.org/10.1016/j.energy.2019.02.099

Chemical looping combustion (CLC) of n-hexadecane and n-heptane with copper and manganese oxides (CuO and Mn2O3) has been investigated in a fixed bed reactor to reveal the extent to which low temperature CLC can potentially be applicable to hydrocarb... Read More about Selective low temperature chemical looping combustion of higher alkanes with Cu- and Mn- oxides.

A novel approach to CO2 capture in Fluid Catalytic Cracking-Chemical Looping Combustion (2019)
Journal Article
Güleç, F., Meredith, W., Sun, C.-G., & Snape, C. E. (2019). A novel approach to CO2 capture in Fluid Catalytic Cracking-Chemical Looping Combustion. Fuel, 244, 140-150. https://doi.org/10.1016/j.fuel.2019.01.168

Oil refineries collectively account for about 4–6% of global CO2 emissions and Fluid Catalytic Cracking (FCC) units are responsible for roughly 25% of these. Although post-combustion and oxy-combustion have been suggested to capture CO2 released from... Read More about A novel approach to CO2 capture in Fluid Catalytic Cracking-Chemical Looping Combustion.

Formation of bitumen in the Elgin/Franklin complex, Central Graben, North Sea: Implications for hydrocarbon charging (2019)
Journal Article
Meredith, W., Uguna, C. N., Snape, C. E., Carr, A. D., & Scotchman, I. C. (2019). Formation of bitumen in the Elgin/Franklin complex, Central Graben, North Sea: Implications for hydrocarbon charging. Geological Society Special Publications, 484, SP484-2017-344. https://doi.org/10.1144/sp484-2017-344

The Elgin/Franklin complex contains gas condensates in Upper Jurassic reservoirs in the North Sea Central Graben. Upper parts of the reservoirs contain bitumens, which previous studies have suggested were formed by the thermal cracking of oil as the... Read More about Formation of bitumen in the Elgin/Franklin complex, Central Graben, North Sea: Implications for hydrocarbon charging.

Evaluating the effect of biochar addition on the anaerobic digestion of swine manure: application of Py-GC/MS (2018)
Journal Article
Gómez, X., Meredith, W., Fernández, C., Sánchez-García, M., Díez-Antolínez, R., Garzón-Santos, J., & Snape, C. E. (in press). Evaluating the effect of biochar addition on the anaerobic digestion of swine manure: application of Py-GC/MS. Environmental Science and Pollution Research, https://doi.org/10.1007/s11356-018-2644-4

The anaerobic digestion process of swine manure was studied when char was used as supplement for improving performance. The use of pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) was proposed for assessing the organic matter degradation. Th... Read More about Evaluating the effect of biochar addition on the anaerobic digestion of swine manure: application of Py-GC/MS.

Dynamics of charcoal alteration in a tropical biome: a biochar-based study (2018)
Journal Article
Ascough, P., Bird, M., Meredith, W., Snape, C. E., Large, D., Tilston, E., …Shen, L. (2018). Dynamics of charcoal alteration in a tropical biome: a biochar-based study. Frontiers in Earth Science, 6, Article 61. https://doi.org/10.3389/feart.2018.00061

Pyrogenic carbon (PyC) is a polyaromatic residue of the incomplete combustion of biomass or fossil fuels. There is a growing recognition that PyC forms an important part of carbon budgets, due to production rates of 116–385 Tg C yr, and the size and... Read More about Dynamics of charcoal alteration in a tropical biome: a biochar-based study.

The impact of hydrothermal carbonisation on the char reactivity of biomass (2018)
Journal Article
Stirling, R. J., Snape, C. E., & Meredith, W. (2018). The impact of hydrothermal carbonisation on the char reactivity of biomass. Fuel Processing Technology, 177, https://doi.org/10.1016/j.fuproc.2018.04.023

Hydrothermal carbonisation (HTC) is an attractive biomass pre-treatment as it produces a coal-like fuel, can easily process wet biomass and wastes, and lowers the risk of slagging and fouling in pulverised fuel (PF) combustion boilers. One of the maj... Read More about The impact of hydrothermal carbonisation on the char reactivity of biomass.

Cryogenian evolution of stigmasteroid biosynthesis (2017)
Journal Article
Hoshino, Y., Poshibaeva, A., Meredith, W., Snape, C., Poshibaev, V., Versteegh, G. J., …Hallmann, C. (2017). Cryogenian evolution of stigmasteroid biosynthesis. Science Advances, 3(9), Article e1700887. https://doi.org/10.1126/sciadv.1700887

Sedimentary hydrocarbon remnants of eukaryotic C26–C30 sterols can be used to reconstruct early algal evolution. Enhanced C29 sterol abundances provide algal cell membranes a density advantage in large temperature fluctuations. Here, we combined a li... Read More about Cryogenian evolution of stigmasteroid biosynthesis.

Analysis of biochars by hydropyrolysis (2017)
Book Chapter
Meredith, W., McBeath, A., Ascough, P., & Bird, M. (2017). Analysis of biochars by hydropyrolysis. In B. Singh, M. Camps-Arbestain, & J. Lehmann (Eds.), Biochar: a guide to analytical methods. CSIRO Publishing

Analysis of biochars for C,H,N,O and S by elemental analyser (2017)
Book Chapter
Bird, M., Keitel, C., & Meredith, W. (2017). Analysis of biochars for C,H,N,O and S by elemental analyser. In B. Singh, M. Camps-Arbestain, & J. Lehmann (Eds.), Biochar: a guide to analytical methods. CSIRO Publishing

Molecular characterization of the thermally labile fraction of biochar by hydropyrolysis and pyrolysis-GC/MS (2016)
Journal Article
Rombolà, A. G., Fabbri, D., Meredith, W., Snape, C. E., & Dieguez-Alonso, A. (2016). Molecular characterization of the thermally labile fraction of biochar by hydropyrolysis and pyrolysis-GC/MS. Journal of Analytical and Applied Pyrolysis, 121, 230-239. https://doi.org/10.1016/j.jaap.2016.08.003

Agroenvironmental benefits and limitations of biochar in soil applications require a full understanding of the stability and fate of the various carbon fractions. Analytical hydropyrolysis (HyPy) enables the determination of the stable black carbon (... Read More about Molecular characterization of the thermally labile fraction of biochar by hydropyrolysis and pyrolysis-GC/MS.

Retardation of oil cracking to gas and pressure induced combination reactions to account for viscous oil in deep petroleum basins: Evidence from oil and n-hexadecane pyrolysis at water pressures up to 900bar (2016)
Journal Article
Uguna, C. N., Carr, A. D., Snape, C. E., & Meredith, W. (2016). Retardation of oil cracking to gas and pressure induced combination reactions to account for viscous oil in deep petroleum basins: Evidence from oil and n-hexadecane pyrolysis at water pressures up to 900bar. Organic Geochemistry, 97, 61-73. https://doi.org/10.1016/j.orggeochem.2016.04.007

This study reports a laboratory pyrolysis experimental study on oil and n-hexadecane to rationalise the thermal stability of oil in deep petroleum reservoirs. Using a 25 ml Hastelloy pressure vessel, a 35° API North Sea oil (Oseberg) and n-hexadecane... Read More about Retardation of oil cracking to gas and pressure induced combination reactions to account for viscous oil in deep petroleum basins: Evidence from oil and n-hexadecane pyrolysis at water pressures up to 900bar.

Thermal Cracking of Oil under Water Pressure up to 900 bar at High Thermal Maturities. 1. Gas Compositions and Carbon Isotopes (2016)
Journal Article
Xie, L., Sun, Y., Uguna, C. N., Li, Y., Snape, C. E., & Meredith, W. (2016). Thermal Cracking of Oil under Water Pressure up to 900 bar at High Thermal Maturities. 1. Gas Compositions and Carbon Isotopes. Energy and Fuels, 30(4), 2617-2627. https://doi.org/10.1021/acs.energyfuels.5b02792

In this study, a C9+ fraction of saturate-rich Tertiary source rock-derived oil from the South China Sea basin was pyrolyzed in normal and supercritical water using a 25 mL vessel at a range of temperature from 350 to 425 °C for 24 h, to probe pressu... Read More about Thermal Cracking of Oil under Water Pressure up to 900 bar at High Thermal Maturities. 1. Gas Compositions and Carbon Isotopes.

Pyrolysis oil upgrading in high conversions using sub- and supercritical water above 400 °C (2016)
Journal Article
Isa, K. M., Snape, C. E., Uguna, C., Meredith, W., & Deng, H. (2016). Pyrolysis oil upgrading in high conversions using sub- and supercritical water above 400 °C. Journal of Analytical and Applied Pyrolysis, 119, 180-188. https://doi.org/10.1016/j.jaap.2016.03.004

The upgrading of pyrolysis oil to bio-fuel was investigated using sub- and supercritical water at 410 and 450oC, with a high mass ratio of water to pyrolysis oil to ascertain the maximum yields that could be achieved. The results indicate that conver... Read More about Pyrolysis oil upgrading in high conversions using sub- and supercritical water above 400 °C.

Impact of high water pressure on oil generation and maturation in Kimmeridge Clay and Monterey source rocks: implications for petroleum retention and gas generation in shale gas systems (2016)
Journal Article
Uguna, C. N., Carr, A. D., Snape, C. E., Meredith, W., Scotchman, I. C., Murray, A., & Vane, C. H. (2016). Impact of high water pressure on oil generation and maturation in Kimmeridge Clay and Monterey source rocks: implications for petroleum retention and gas generation in shale gas systems. Marine and Petroleum Geology, 73, https://doi.org/10.1016/j.marpetgeo.2016.02.028

This study presents results for pyrolysis experiments conducted on immature Type II and IIs source rocks (Kimmeridge Clay, Dorset UK, and Monterey shale, California, USA respectively) to investigate the impact of high water pressure on source rock ma... Read More about Impact of high water pressure on oil generation and maturation in Kimmeridge Clay and Monterey source rocks: implications for petroleum retention and gas generation in shale gas systems.

The priming potential of environmentally weathered pyrogenic carbon during land-use transition to biomass crop production (2015)
Journal Article
McClean, G. J., Meredith, W., Cross, A., Heal, K. V., Bending, G. D., & Sohi, S. P. (2016). The priming potential of environmentally weathered pyrogenic carbon during land-use transition to biomass crop production. GCB Bioenergy, 8(4), https://doi.org/10.1111/gcbb.12293

Since land-use change (LUC) to lignocellulosic biomass crops often causes a loss of soil organic carbon (SOC), at least in the short term, this study investigated the potential for pyrogenic carbon (PyC) to ameliorate this effect. Although negative p... Read More about The priming potential of environmentally weathered pyrogenic carbon during land-use transition to biomass crop production.

Determining the lower limit of Liangzhu culture based on black carbon purification with hydropyrolysis technique (2015)
Journal Article
Zhang, X., Huang, D., Han Deng, H., Snape, C., Meredith, W., Zhao, Y., …Sun, Y. (2015). Determining the lower limit of Liangzhu culture based on black carbon purification with hydropyrolysis technique. Quaternary Geochronology, 30(A), https://doi.org/10.1016/j.quageo.2015.07.001

Located in the middle and lower reaches of the Yangtze River, the Liangzhu Culture was one of the most important Neolithic cultures at the dawn of Chinese civilization. However, uncertainty over the lower age limit ending the Liangzhu Culture has res... Read More about Determining the lower limit of Liangzhu culture based on black carbon purification with hydropyrolysis technique.

Multiple Cosmic Sources for Meteorite Macromolecules? (2015)
Journal Article
Sephton, M. A., Watson, J. S., Meredith, W., Love, G. D., Gilmour, I., & Snape, C. E. (2015). Multiple Cosmic Sources for Meteorite Macromolecules?. Astrobiology, 15(10), 779-786. https://doi.org/10.1089/ast.2015.1331

The major organic component in carbonaceous meteorites is an organic macromolecular material. The Murchison macromolecular material comprises aromatic units connected by aliphatic and heteroatom-containing linkages or occluded within the wider struct... Read More about Multiple Cosmic Sources for Meteorite Macromolecules?.

Fate of soil organic carbon and polycyclic aromatic hydrocarbons in a vineyard soil treated with biochar (2015)
Journal Article
Rombolà, A. G., Meredith, W., Baronti, S., Snape, C. E., Genesio, L., Vaccari, F. P., …Fabbri, D. (2015). Fate of soil organic carbon and polycyclic aromatic hydrocarbons in a vineyard soil treated with biochar. Environmental Science and Technology, 49(18), https://doi.org/10.1021/acs.est.5b02562

The effect of biochar addition on the levels of black carbon (BC) and polcyclic aromatic hydrocarbons (PAHs) in a vineyard soil in central Italy was investigated within a two year period. Hydropyrolysis (HyPy) was used to determine the contents of BC... Read More about Fate of soil organic carbon and polycyclic aromatic hydrocarbons in a vineyard soil treated with biochar.

Geochemistry and petrology of palaeocene coals from Spitzbergen — Part 2: Maturity variations and implications for local and regional burial models (2015)
Journal Article
Marshall, C., Uguna, J., Large, D. J., Meredith, W., Jochmann, M., Friis, B., …Orheim, A. (2015). Geochemistry and petrology of palaeocene coals from Spitzbergen — Part 2: Maturity variations and implications for local and regional burial models. International Journal of Coal Geology, 143, 1-10. https://doi.org/10.1016/j.coal.2015.03.013

The Central Tertiary Basin is an uplifted part of the North Barents Shelf and should be an ideal location to understand the thermal history, maximum burial depth and overburden thickness in this petroleum-rich area. Efforts to quantify the thermal hi... Read More about Geochemistry and petrology of palaeocene coals from Spitzbergen — Part 2: Maturity variations and implications for local and regional burial models.