Skip to main content

Research Repository

Advanced Search

All Outputs (54)

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.

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.

Continuous testing of silica-PEI adsorbents in a lab.-scale twin bubbling fluidized-bed system (2019)
Journal Article
Kim, J.-Y., Woo, J.-M., Jo, S.-H., Lee, S.-Y., Moon, J.-H., Kim, H., …Park, Y. C. (2019). Continuous testing of silica-PEI adsorbents in a lab.-scale twin bubbling fluidized-bed system. International Journal of Greenhouse Gas Control, 82, 184-191. https://doi.org/10.1016/j.ijggc.2019.01.007

In this study, a lab.-scale twin bubbling fluidized-bed system (TBS) has been used continuously to test the performance for CO2 adsorption of silica-PEI (S.PEI) adsorbents, containing 40 wt.% of PEI, which were supplied by the University of Nottingha... Read More about Continuous testing of silica-PEI adsorbents in a lab.-scale twin bubbling fluidized-bed system.

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.

Understanding the unusual fluidity characteristics of high ash Indian bituminous coals (2018)
Journal Article
Das, B., Suresh, A., Dash, P., Chandran, S., Castro-Díaz, M., Stevens, L. A., & Snape, C. E. (2018). Understanding the unusual fluidity characteristics of high ash Indian bituminous coals. Fuel Processing Technology, 176, https://doi.org/10.1016/j.fuproc.2018.04.003

High-temperature rheometry and 1H nuclear magnetic resonance (NMR) are two complementary techniques that have been used to investigate fluidity development quantitatively in the < 53 µm and 53-212 µm size fractions of high ash Indian non-coking coals... Read More about Understanding the unusual fluidity characteristics of high ash Indian bituminous coals.

Correlating ultrasonic impulse and addition of ZnO promoter with CO2 conversion and methanol selectivity of CuO/ZrO2 catalysts (2017)
Journal Article
Ezeh, C. I., Yang, X., He, J., Snape, C., & Cheng, X. M. (2018). Correlating ultrasonic impulse and addition of ZnO promoter with CO2 conversion and methanol selectivity of CuO/ZrO2 catalysts. Ultrasonics Sonochemistry, 42, 48-56. https://doi.org/10.1016/j.ultsonch.2017.11.013

The thermal characteristics of Cu-based catalysts for CO2 utilization towards the synthesis of methanol were analysed and discussed in this study. The preparation process were varied by adopting ultrasonic irradiation at various impulses for the co-p... Read More about Correlating ultrasonic impulse and addition of ZnO promoter with CO2 conversion and methanol selectivity of CuO/ZrO2 catalysts.

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.

Advances on transition metal oxides catalysts for formaldehyde oxidation: a review (2017)
Journal Article
Yusuf, A., Snape, C., He, J., Xu, H., Liu, C., Zhao, M., …Behera, S. N. (in press). Advances on transition metal oxides catalysts for formaldehyde oxidation: a review. Catalysis Reviews: Science and Engineering, https://doi.org/10.1080/01614940.2017.1342476

This review highlights recent advances in the development of transition metal based catalysts for formaldehyde oxidation, particularly the enhancement of their catalytic activity for low temperature oxidation. Various factors that enhance low tempera... Read More about Advances on transition metal oxides catalysts for formaldehyde oxidation: a review.

Evaluation of hydrochars from lignin hydrous pyrolysis to produce biocokes after carbonization (2016)
Journal Article
Castro-Díaz, M., Uguna, C. N., Florentino, L., Díaz-Faes, E., Stevens, L., Barriocanal, C., & Snape, C. (2017). Evaluation of hydrochars from lignin hydrous pyrolysis to produce biocokes after carbonization. Journal of Analytical and Applied Pyrolysis, 124, 742-751. https://doi.org/10.1016/j.jaap.2016.11.010

Hydrochars were obtained after hydrous pyrolysis of a pine Kraft lignin using different reaction conditions (temperature, water content and residence time) and the residues were characterized through a wide range of analytical techniques including hi... Read More about Evaluation of hydrochars from lignin hydrous pyrolysis to produce biocokes after carbonization.

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.

Aerosol composition and sources during high and low pollution periods in Ningbo, China (2016)
Journal Article
Xu, J.-S., Xu, H.-H., Xiao, H., Tong, L., Snape, C. E., Wang, C.-J., & He, J. (2016). Aerosol composition and sources during high and low pollution periods in Ningbo, China. Atmospheric Research, 178-179, 559-569. https://doi.org/10.1016/j.atmosres.2016.05.006

Due to the rapid industrialization of the Yangtze River Delta (YRD) region in China, heavy air pollution episodes have occurred frequently over the past five years which are of great concern due to their environmental and health impacts. To investiga... Read More about Aerosol composition and sources during high and low pollution periods in Ningbo, China.

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.

Effect of Potassium on the Mechanisms of Biomass Pyrolysis Studied using Complementary Analytical Techniques (2016)
Journal Article
Le Brech, Y., Ghislain, T., Leclerc, S., Bouroukba, M., Delmotte, L., Brosse, N., …Dufour, A. (2016). Effect of Potassium on the Mechanisms of Biomass Pyrolysis Studied using Complementary Analytical Techniques. ChemSusChem, 9(8), 863-872. https://doi.org/10.1002/cssc.201501560

Complementary analytical methods have been used to study the effect of potassium on the pyrolysis mechanisms of cellulose and lignocellulosic biomasses. Thermogravimetry, calorimetry, high-temperature 1H NMR spectroscopy (in situ and real-time analys... Read More about Effect of Potassium on the Mechanisms of Biomass Pyrolysis Studied using Complementary Analytical Techniques.

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.

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.