Clement Uguna

Contact

• workRoom C03 The Energy Technologies Building
  Innovation Park
  Triumph Road
  Nottingham
  NG7 2TU
  UK
• work0115 74 84458
• clement.uguna@nottingham.ac.uk

Research Summary

Dr Uguna is a Research Fellow at the Faculty of Engineering. He is currently investigating the mechanism of shale gas formation and how gas is stored within shale rocks in unconventional reservoirs… read more

Recent Publications

• YANG, F., LIU, X., LI, M., UGUNA, C., WANG, W. and SUN, C., 2023. Polyvinyl chloride (PVC) derived microporous carbons prepared via hydrothermal dechlorination and potassium hydroxide activation for efficient CO2 capture: Renewable and Sustainable Energy Reviews Renewable and Sustainable Energy Reviews. 180,
• LI, W., STEVENS, L. A., MEREDITH, W., UGUNA, C. N., VANE, C. H., ZHANG, B., CARR, A. D., ZHENG, D. and SNAPE, C. E., 2022. The effect of oil extraction on porosity and methane adsorption for dry and moisture-equilibrated shales: Fuel Fuel. 316,
• WEIR, A., JIMÉNEZ DEL BARCO CARRIÓN, A., QUEFFÉLEC, C., BUJOLI, B., CHAILLEUX, E., UGUNA, C. N., SNAPE, C. and AIREY, G., 2022. Renewable binders from waste biomass for road construction: A review on thermochemical conversion technologies and current developments: Construction and Building Materials Construction and Building Materials. 330,
• MUSA, U., CASTRO-DÍAZ, M., UGUNA, C. N. and SNAPE, C. E., 2022. Effect of process variables on producing biocoals by hydrothermal carbonisation of pine Kraft lignin at low temperatures: Fuel Fuel. 325,

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Current Research

Dr Uguna is a Research Fellow at the Faculty of Engineering. He is currently investigating the mechanism of shale gas formation and how gas is stored within shale rocks in unconventional reservoirs by using high water pressure pyrolysis technique to simulate shale gas generation as a function of temperature and pressure over geological time scales. This is to improve our understanding of the mechanism of shale gas formation and how it is stored within shale rocks.

Past Research

Dr Uguna have previously investigated the effects of pressure on hydrocarbon (oil and gas) generation, source rock maturation and oil cracking to gas in conventional hydrocarbon reservoir using closed system high liquid water pressure pyrolysis technique, and also investigated biomass conversion to liquid hydrocarbon using liquefied solvent extraction method.

• YANG, F., LIU, X., LI, M., UGUNA, C., WANG, W. and SUN, C., 2023. Polyvinyl chloride (PVC) derived microporous carbons prepared via hydrothermal dechlorination and potassium hydroxide activation for efficient CO2 capture: Renewable and Sustainable Energy Reviews Renewable and Sustainable Energy Reviews. 180,
• LI, W., STEVENS, L. A., MEREDITH, W., UGUNA, C. N., VANE, C. H., ZHANG, B., CARR, A. D., ZHENG, D. and SNAPE, C. E., 2022. The effect of oil extraction on porosity and methane adsorption for dry and moisture-equilibrated shales: Fuel Fuel. 316,
• WEIR, A., JIMÉNEZ DEL BARCO CARRIÓN, A., QUEFFÉLEC, C., BUJOLI, B., CHAILLEUX, E., UGUNA, C. N., SNAPE, C. and AIREY, G., 2022. Renewable binders from waste biomass for road construction: A review on thermochemical conversion technologies and current developments: Construction and Building Materials Construction and Building Materials. 330,
• MUSA, U., CASTRO-DÍAZ, M., UGUNA, C. N. and SNAPE, C. E., 2022. Effect of process variables on producing biocoals by hydrothermal carbonisation of pine Kraft lignin at low temperatures: Fuel Fuel. 325,
• UGUNA, C. N. and SNAPE, C. E., 2022. Should IQOS Emissions Be Considered as Smoke and Harmful to Health? A Review of the Chemical Evidence: ACS Omega ACS Omega.
• IBRAHIM, A., LIU, X., UGUNA, C. N. and SUN, C., 2022. Hydrodeoxygenation of p-cresol over CuNi@C catalyst derived from metal-organic frameworks precursor: Fuel Fuel. 329,
• LI, W., STEVENS, L. A., UGUNA, C. N., VANE, C. H., MEREDITH, W., TANG, L., LI, Q. and SNAPE, C. E., 2021. Comparison of the impact of moisture on methane adsorption and nanoporosity for over mature shales and their kerogens: International Journal of Coal Geology International Journal of Coal Geology. 237,
• DURAN-JIMENEZ, GABRIELA, KOSTAS, EMILY T, STEVENS, LEE A, MEREDITH, WILL, ERANS, MARIA, HERNANDEZ-MONTOYA, VIRGINIA, BUTTRESS, ADAM, UGUNA, CLEMENT N and BINNER, ELEANOR, 2021. Green and simple approach for low-cost bioproducts preparation and CO₂ capture. Chemosphere. 279, 130512
• RIGBY, SEAN P., JAHAN, HOSNE, STEVENS, LEE, UGUNA, CLEMENT, SNAPE, COLIN, MACNAUGHTON, BILL, LARGE, DAVID J. and FLETCHER, ROBIN S., 2020. Pore structural evolution of shale following thermochemical treatment MARINE AND PETROLEUM GEOLOGY. 112,
• MEREDITH, W., UGUNA, C. N., SNAPE, C. E., CARR, A. D. and SCOTCHMAN, I. C., 2019. Formation of bitumen in the Elgin-Franklin complex, Central Graben, North Sea: implications for hydrocarbon charging Geological Society, London, Special Publications. 484,
• WHITELAW, P, UGUNA, C. N, STEVENS, L. A, MEREDITH, W, SNAPE, C. E, VANE, C. H, MOSS-HAYES, V and CARR, A. D, 2019. Shale gas reserve evaluation by laboratory pyrolysis and gas holding capacity consistent with field data Nature Communications.
• XIE, LIUJUAN, SUN, YONGGE, UGUNA, CLEMENT N., LI, YOUCHUAN, SNAPE, COLIN E. and MEREDITH, WILL, 2019. Thermal Cracking of Oil under Water Pressure up to 900 Bar at High Thermal Maturities: 2. Insight from Light Hydrocarbon Generation and Carbon Isotope Fractionation ENERGY & FUELS. 33(10), 9546-9558
• JAKUB FRĄTCZAK, JOSÉ M. HIDALGO HERRADOR, JAROMÍR LEDERER, LEE STEVENS, CLEMENT UGUNA, COLIN SNAPE, JOSÉ L, GÓMEZ DE LA FUENTE, LUKÁŠ ANDĚL, PETR SVOBODA and FILOMENA PINTO, 2018. Direct primary brown coal liquefaction via non-catalytic and catalytic coprocessing with model, waste and petroleum-derived hydrogen donors Fuel. 234, 364-370
• MONAGHAN, A. A, ARSENIKOS, S, QUINN, M. F, JOHNSON, K. R, VINCENT, C. J, VANE, C. H, KIM, A. W, UGUNA, C. N, HANNIS, S. D, GENT, C. M. A, MILLWARD, D, KEARSEY, T. I and WILLIAMSON, J. P, 2017. Carboniferous petroleum systems around the Mid North Sea High, UK Journal of Marine and Petroleum Geology. 88, 282-302
• CASTRO-DIAZ, M., UGUNA, C. N., FIORENTINO, L., DIAZ-FAES, E., STEVENS, L. A., BARRIOCANAL, C. and SNAPE, C. E., 2017. Evaluation of hydrochars from lignin hydrous pyrolysis to produce biocokes after carbonization JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS. 124, 742-751
• UGUNA C. N, CARR A. D, SNAPE C.E, MEREDITH W, SCOTCHMAN I.C, MURRAY A and VANE C.H, 2016. Impact of high water pressure on oil generation and maturation in Kimmeridge Clay and Monterey source rocks: Implication for petroleum retention and gas generation in shale gas systems Journal of Marine and Petroleum Geology. 73, 72-85
• CASTRO DÍAZ, M., UGUNA, C. N., CHEESEMAN, B., BARKER, J. and SNAPE, C. E., 2016. Investigation of the Fluid Behavior of Asphaltenes and Toluene Insolubles by High-Temperature Proton Nuclear Magnetic Resonance and Rheometry and Their Application to Visbreaking Energy and Fuels. 30(3), 2012-2020
• ISA, K. M., SNAPE, C. E., UGUNA, C., MEREDITH, W. and DENG, H., 2016. Pyrolysis oil upgrading in high conversions using sub- and supercritical water above 400°C: Journal of Analytical and Applied Pyrolysis Journal of Analytical and Applied Pyrolysis. 119, 180-188
• LIUJUAN XIE, YONGGE SUN, CLEMENT N. UGUNA, YOUCHUAN LI, COLIN E. SNAPE and WILL MEREDITH, 2016. Thermal cracking of oil under water pressure up to 900 bar at high thermal maturities 1. Gas compositions and carbon isotopes, Energy & Fuels 30, 2617-2627
• UGUNA, C.N., CARR, A. D., SNAPE, C.E. and 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 900 bar Organic Geochemistry. 97, 61-73
• UGUNA, C.N., CARR, A.D., SNAPE, C.E. and MEREDITH, W., 2015. High pressure water pyrolysis of coal to evaluate the role of pressure on hydrocarbon generation and source rock maturation at high maturities under geological conditions Organic Geochemistry. 78, 44-51
• MARSHALL C, LARGE D J, MEREDITH W, SNAPE C E, UGUNA C, SPIRO B F, ORHEIM A and ORHEIM A, 2015. Geochemistry and petrology of palaeocene coals from Spitsbergen-Part 1: Oil potential and depositional environment International Journal of Coal Geology. 143, 22-33
• DENG, H., MEREDITH, W., UGUNA, C. and SNAPE, C.E., 2015. Impact of solvent type and condition on biomass liquefaction to produce heavy oils in high yield with low oxygen contents Journal of Analytical and Applied Pyrolysis. 113, 340-348
• ISA KHAIRUDDIN MD, SNAPE E COLIN, UGUNA CLEMENT and MEREDITH WILL, 2015. High conversions of miscanthus using sub- and supercritical water above 400o C Journal of Analytical and Applied Pyrolysis. 113, 646-654
• CARR A. D and UGUNA C. N, 2015. Some Thoughts on the influence of pressure and thermal history assumptions on the petroleum systems modelling Journal of Petroleum Geology. 38(4), 459-465
• UGUNA C. N, AZRI M. H, SNAPE C. E, MEREDITH W and CARR A. D, 2013. A hydrous pyrolysis study to ascertain how gas yields and the extent of maturation for a partially matured source rock and bitumen in isolation compared to their whole source rock Journal of Analytical and Applied Pyrolysis. 103, 268-277
• UGUNA, C.N., SNAPE, C.E., MEREDITH, W., CARR, A.D., SCOTCHMAN, I.C. and DAVIS, R.C., 2012. Retardation of hydrocarbon generation and maturation by water pressure in geologic basins: An experimental investigation. In: PETERS, K.E., CURRY, D.J. and KACEWICZ, M., eds., Basin Modeling: New Horizons in Research and Applications: AAPG Hedberg Series 4 19-37
• UGUNA, C.N, CARR, A.D, SNAPE, C.E, MEREDITH, W and CASTRO-DÍAZ, M, 2012. A laboratory pyrolysis study to investigate the effect of water pressure on hydrocarbon generation and maturation of coals in geological basins Organic Geochemistry. 52, 103-113
• SONIBARE, O.O, SNAPE, C.E, MEREDITH, W, UGUNA, C and LOVE, G.D., 2009. Geochemical characterisation of heavily biodegraded oil sand bitumens by catalytic hydropyrolysis. Journal of Analytical and Applied Pyrolysis. 86, 135-140
• CARR, A.D., SNAPE, C.E., MEREDITH, W., UGUNA, C., SCOTCHMAN, I.C. and DAVIS, R.C., 2009. The effect of water pressure on hydrocarbon generation reactions: some inferences from laboratory experiments Petroleum Geoscience. 15(1), 17-26
• MEREDITH, W, SNAPE, C.E, UGUNA, C and LOVE, G.D., 2008. Maximising the yield of bound aliphatic biomarkers via a convenient two-stage hydropyrolysis procedure. In: LIANG, D, WANG, D and LI, Z, eds., Petroleum Geochemistry and Exploration in the Afro-Asian Region Taylor and Francis. 145-152