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Demonstrating the applicability of chemical looping combustion for the regeneration of fluid catalytic cracking catalysts (2020)
Journal Article
Güleç, F., Meredith, W., Sun, C. G., & Snape, C. E. (2020). Demonstrating the applicability of chemical looping combustion for the regeneration of fluid catalytic cracking catalysts. Chemical Engineering Journal, 389, Article 124492. https://doi.org/10.1016/j.cej.2020.124492

© 2020 Elsevier B.V. Fluid Catalytic Cracking (FCC) units are responsible for roughly 25% of CO2 emissions from oil refineries, which themselves account for 4–6% of total global CO2 emissions. Although post- and oxy-combustion technologies have been... Read More about Demonstrating the applicability of chemical looping combustion for the regeneration of fluid catalytic cracking catalysts.

Microwave pyrolysis of olive pomace for bio-oil and bio-char production (2019)
Journal Article
Williams, O. S., Kostas, E. T., Durán-Jiménez, G., Shepherd, B. J., Meredith, W., Stevens, L. A., Robinson, J. P., & Lye, G. J. (2020). Microwave pyrolysis of olive pomace for bio-oil and bio-char production. Chemical Engineering Journal, 387, Article 123404. https://doi.org/10.1016/j.cej.2019.123404

Olive pomace is a widely available agro-industrial waste residue in Europe that has the potential to contribute towards a circular, low carbon bio-economy. This study demonstrated, for the first time, the ability to successfully pyrolyse olive pomace... Read More about Microwave pyrolysis of olive pomace for bio-oil and bio-char production.

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., Moss-Hayes, V., & 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.-G., & 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.

Methane transport in agricultural soil after injection of isotopically-enriched methane in the sub-surface (2018)
Journal Article
Shaw, G., Atkinson, B., Meredith, W., Snape, C., Lever, D., & Hoch, A. (2018). Methane transport in agricultural soil after injection of isotopically-enriched methane in the sub-surface. Scientific Data, 5, 180208. https://doi.org/10.1038/sdata.2018.208

Small quantities of radioactive methane (14CH4) may be released over prolonged periods from geological disposal facilities for radioactive waste. The impact of this release depends on the capacity of soil to oxidise 14CH4 to 14CO2 during transport fr... Read More about Methane transport in agricultural soil after injection of isotopically-enriched methane in the sub-surface.

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., Apperley, D., Bernabé, A., & 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.

Methane transport through an agricultural soil following pulse injection of isotopically-enriched methane in the sub-surface (2018)
Data
SHAW, G., Atkinson, B., Meredith, W., Snape, C., Lever, D., & Hoch, A. (2018). Methane transport through an agricultural soil following pulse injection of isotopically-enriched methane in the sub-surface. [Data]. https://doi.org/10.5285/18939865-d863-498b-b4cb-5661eaeadcfc

Data comprise methane and carbon dioxide concentrations in soil following injection of discrete pulses of methane into subsoil (50 cm depth) below a spring wheat crop during the growing season.
Supporting data on soil moisture, soil temperature and... Read More about Methane transport through an agricultural soil following pulse injection of isotopically-enriched methane in the sub-surface.

Cryogenian evolution of stigmasteroid biosynthesis (2017)
Journal Article
Hoshino, Y., Poshibaeva, A., Meredith, W., Snape, C., Poshibaev, V., Versteegh, G. J., Kuznetsov, N., Leider, A., van Maldegem, L., Neumann, M., Naeher, S., Moczydłowska, M., Brocks, J. J., Jarrett, A. J., Tang, Q., Xiao, S., McKirdy, D., Das, S. K., Alvaro, J. J., Sansjofre, P., & 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.

Improving spatial predictability of petroleum resources within the Central Tertiary Basin, Spitsbergen: a geochemical and petrographic study of coals from the eastern and western coalfields (2017)
Journal Article
Uguna, J. O., Carr, A. D., Marshall, C., Large, D., Meredith, W., Jochmann, M., Snape, C. E., Vane, C. H., Jensen, M. A., & Olaussen, S. (2017). Improving spatial predictability of petroleum resources within the Central Tertiary Basin, Spitsbergen: a geochemical and petrographic study of coals from the eastern and western coalfields. International Journal of Coal Geology, 179, 278-294. https://doi.org/10.1016/j.coal.2017.06.007

Central Tertiary Basin (CTB) coals from a variety of palaeogeographic conditions within the Longyear and Verkhnij seams, were sampled to assess the relationship between the petroleum present, the remaining generation potential and coal geochemistry i... Read More about Improving spatial predictability of petroleum resources within the Central Tertiary Basin, Spitsbergen: a geochemical and petrographic study of coals from the eastern and western coalfields.

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

Increased charcoal yield and production of lighter oils from the slow pyrolysis of biomass (2017)
Journal Article
Russell, S., Turrion-Gomez, J. L., Meredith, W., Langston, P. A., & Snape, C. E. (2017). Increased charcoal yield and production of lighter oils from the slow pyrolysis of biomass. Journal of Analytical and Applied Pyrolysis, 124, 536-541. https://doi.org/10.1016/j.jaap.2017.01.028

In an effort to reduce CO2 emissions from solid fuels, a considerable amount of research is going into how improve the manufacturing processes and product properties of the products from pyrolysis. One aspect that is often overlooked is the productio... Read More about Increased charcoal yield and production of lighter oils from the slow pyrolysis of biomass.

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.