Dr LEE STEVENS's Outputs (47)

Towards a scalable cacao pod husk biorefinery: Understanding the effects of process conditions on phenolic antioxidant extraction and residual solid properties (2024)
Journal Article
Dewi, S. R., Stevens, L. A., Anwar, M., Mao, Y., Ferrari, R. S., Irvine, D. J., & Binner, E. R. (2025). Towards a scalable cacao pod husk biorefinery: Understanding the effects of process conditions on phenolic antioxidant extraction and residual solid properties. Chemical Engineering Science, 305, Article 121171. https://doi.org/10.1016/j.ces.2024.121171

Cacao pod husk (CPH) is a potential source of phenolic-based antioxidants and lignocellulosic compounds. Sample pretreatments and extraction conditions were investigated to understand their effects on extraction yields and implications for industrial... Read More about Towards a scalable cacao pod husk biorefinery: Understanding the effects of process conditions on phenolic antioxidant extraction and residual solid properties.

Single-step preparation of activated carbons from pine wood, olive stones and nutshells by KOH and microwaves: Influence of ultra-microporous for high CO2 capture (2024)
Journal Article
Duran-Jimenez, G., Rodriguez, J., Stevens, L., Altarawneh, S., Batchelor, A., Jiang, L., & Dodds, C. (2024). Single-step preparation of activated carbons from pine wood, olive stones and nutshells by KOH and microwaves: Influence of ultra-microporous for high CO2 capture. Chemical Engineering Journal, 499, Article 156135. https://doi.org/10.1016/j.cej.2024.156135

Biomass residues are crucial feedstocks for facing climate change challenges due to high-value products, such as producing activated carbons (AC) for carbon capture. Two stages of pyrolysis followed by activation at high temperatures are the most use... Read More about Single-step preparation of activated carbons from pine wood, olive stones and nutshells by KOH and microwaves: Influence of ultra-microporous for high CO2 capture.

MRI and PFG NMR studies of percolation effects in advanced melting during a cryoporometry characterisation of disordered mesoporous alumina (2024)
Journal Article
Himona, E., Stevens, L., Williams, H., & Rigby, S. P. (2024). MRI and PFG NMR studies of percolation effects in advanced melting during a cryoporometry characterisation of disordered mesoporous alumina. Microporous and Mesoporous Materials, 377, Article 113202. https://doi.org/10.1016/j.micromeso.2024.113202

Cryoporometry (or thermoporometry) offers a way of pore structural characterisation for mesoporous materials that often needs little sample preparation, is relatively quick, and is statistically-representative for macroscopic samples. While it is wel... Read More about MRI and PFG NMR studies of percolation effects in advanced melting during a cryoporometry characterisation of disordered mesoporous alumina.

Microwave thermal pre-treatment and calcination of biomineralised sorbents for calcium looping (2024)
Journal Article
Erans, M., Durán-Jimenez, G., Rodríguez, J. M., Stevens, L., & Dodds, C. (2024). Microwave thermal pre-treatment and calcination of biomineralised sorbents for calcium looping. Journal of Co2 Utilization, 83, Article 102794. https://doi.org/10.1016/j.jcou.2024.102794

Waste eggshells have been investigated as biomineralised CO2 sorbents for the calcium looping cycle due to their high Ca content, low cost, availability, and high CO2 uptake. This work investigates a novel heat-pre-treatment using eggshells as raw ma... Read More about Microwave thermal pre-treatment and calcination of biomineralised sorbents for calcium looping.

Microwave pyrolysis of waste biomass and synthesis of micro-mesoporous activated carbons: The role of textural properties for CO2 and textile dye adsorption (2024)
Journal Article
Durán-Jiménez, G., Rodriguez, J., Stevens, L., Kostas, E. T., & Dodds, C. (2024). Microwave pyrolysis of waste biomass and synthesis of micro-mesoporous activated carbons: The role of textural properties for CO2 and textile dye adsorption. Chemical Engineering Journal, 488, Article 150926. https://doi.org/10.1016/j.cej.2024.150926

Hierarchical porous activated carbons (ACs) were efficiently synthesized in less than 2 min using microwaves and phosphoric acid (H3PO4), exhibiting excellent potential as adsorbent for carbon dioxide (CO2) and Methylene Blue (MB). The method emphasi... Read More about Microwave pyrolysis of waste biomass and synthesis of micro-mesoporous activated carbons: The role of textural properties for CO2 and textile dye adsorption.

Exploring the Utilisation of Natural Biosorbents for Effective Methylene Blue Removal (2023)
Journal Article
Güleç, F., Williams, O., Samson, A., Kostas, E., Stevens, L. A., & Lester, E. (2023). Exploring the Utilisation of Natural Biosorbents for Effective Methylene Blue Removal. Applied Sciences, 14(1), Article 81. https://doi.org/10.3390/app14010081

This paper presents a comprehensive analysis of the adsorbent capacity of five distinctly different biosorbents derived from untreated biomasses. The optimal adsorption capacity of seaweed (Laminaria digitata), horse chestnut husk, hazelnut husk, rap... Read More about Exploring the Utilisation of Natural Biosorbents for Effective Methylene Blue Removal.

GC-MS analysis of alkylpyrazines in the pyrolysis oils of silica-polyethylenimine CO2 sorbents (2023)
Journal Article
Coralli, I., Spada, L., Fabbri, D., Pour, S. R. S., Fiori, J., Vassura, I., Stefanidis, S., Lappas, A., Stevens, L. A., & Snape, C. E. (2024). GC-MS analysis of alkylpyrazines in the pyrolysis oils of silica-polyethylenimine CO2 sorbents. Journal of Chromatography Open, 5, Article 100108. https://doi.org/10.1016/j.jcoa.2023.100108

Solid sorbents based on silica and polyethyleneimine (PEI) are intensively investigated in the field of carbon capture and storage (CCS). Pyrolysis was proposed as a thermal process to recover the pure silica from exhausted sorbents and convert PEI i... Read More about GC-MS analysis of alkylpyrazines in the pyrolysis oils of silica-polyethylenimine CO2 sorbents.

Valorization Strategies in CO2 Capture: A New Life for Exhausted Silica-Polyethylenimine (2023)
Journal Article
Coralli, I., Giuri, D., Spada, L., Ortolani, J., Mazzocchetti, L., Tomasini, C., Stevens, L. A., Snape, C. E., & Fabbri, D. (2023). Valorization Strategies in CO2 Capture: A New Life for Exhausted Silica-Polyethylenimine. International Journal of Molecular Sciences, 24(19), Article 14415. https://doi.org/10.3390/ijms241914415

The search for alternative ways to give a second life to materials paved the way for detailed investigation into three silica-polyethylenimine (Si-PEI) materials for the purpose of CO2 adsorption in carbon capture and storage. A solvent extraction pr... Read More about Valorization Strategies in CO2 Capture: A New Life for Exhausted Silica-Polyethylenimine.

Amine functionalized lignin-based mesoporous cellular carbons for CO2 capture (2023)
Journal Article
Sani, S., Liu, X., Stevens, L., Wang, H., & Sun, C. (2023). Amine functionalized lignin-based mesoporous cellular carbons for CO2 capture. Fuel, 351, Article 128886. https://doi.org/10.1016/j.fuel.2023.128886

Amine-impregnated mesoporous carbon sorbents have been considered one of the most promising sorbents for CO2 capture from streams with low CO2 concentrations. In this work, a series of novel solid amine adsorbents were prepared by impregnating polyet... Read More about Amine functionalized lignin-based mesoporous cellular carbons for CO2 capture.

Rapid synthesis of magnetic microspheres and the development of new macro-micro hierarchically porous magnetic framework composites (2023)
Journal Article
Woodliffe, J. L., Molinar-Díaz, J., Islam, M. T., Stevens, L. A., Wadge, M. D., Rance, G. A., Ferrari, R., Ahmed, I., & Laybourn, A. (2023). Rapid synthesis of magnetic microspheres and the development of new macro-micro hierarchically porous magnetic framework composites. Journal of Materials Chemistry A, 11(27), 14705-14719. https://doi.org/10.1039/D3TA01927F

Magnetic framework composites (MFCs) are a highly interesting group of materials that contain both metal–organic frameworks (MOFs) and magnetic materials. Combining the unique benefits of MOFs (tuneable natures, high surface areas) with the advantage... Read More about Rapid synthesis of magnetic microspheres and the development of new macro-micro hierarchically porous magnetic framework composites.

Solutions to hazardous wastes issues in the leather industry: adsorption of Chromium iii and vi from leather industry wastewaters using activated carbons produced from leather industry solid wastes (2023)
Journal Article
Jimenez-Paz, J., Lozada-Castro, J. J., Lester, E., Williams, O., Stevens, L., & Barraza-Burgos, J. (2023). Solutions to hazardous wastes issues in the leather industry: adsorption of Chromium iii and vi from leather industry wastewaters using activated carbons produced from leather industry solid wastes. Journal of Environmental Chemical Engineering, 11(3), Article 109715. https://doi.org/10.1016/j.jece.2023.109715

This study presents the use of an innovative material to tackle hazardous wastes in the leather industry. Activated carbons produced from Leather industry waste (LIW) were used to adsorb (Cr) III and (VI), which are found in leather wastewater. Two p... Read More about Solutions to hazardous wastes issues in the leather industry: adsorption of Chromium iii and vi from leather industry wastewaters using activated carbons produced from leather industry solid wastes.

Analytical pyrolysis of polyethyleneimines (2022)
Journal Article
Coralli, I., Fabbri, D., Facchin, A., Torri, C., Stevens, L. A., & Snape, C. E. (2023). Analytical pyrolysis of polyethyleneimines. Journal of Analytical and Applied Pyrolysis, 169, Article 105838. https://doi.org/10.1016/j.jaap.2022.105838

Poly(ethylene imine) is a family of polymers with a high content of amine groups employed in various applications and widely investigated as CO2 adsorbents in carbon capture and sequestration. In this study, five branched polyethylenimines (PEIs) of... Read More about Analytical pyrolysis of polyethyleneimines.

Combining molecular simulation and experiment to understand the effect of moisture on methane adsorption in kerogens (2022)
Journal Article
Li, W., Stevens, L. A., Zhang, B., Zheng, D., & Snape, C. E. (2023). Combining molecular simulation and experiment to understand the effect of moisture on methane adsorption in kerogens. Chemical Engineering Journal, 454, 139942. https://doi.org/10.1016/j.cej.2022.139942

There is a limited understanding of the critical impact moisture has on shale gas resource estimation by affecting gas adsorption and pore structure. Laboratory experiments on dry and 95% relative humidity (R.H.) isolated kerogens are combined with G... Read More about Combining molecular simulation and experiment to understand the effect of moisture on methane adsorption in kerogens.

Solutions to Hazardous Wastes Issues in the Leather Industry: Adsorption of Chromium Iii and Vi from Leather Industry Wastewaters Using Activated Carbons Produced from Leather Industry Solid Wastes (2022)
Preprint / Working Paper
Jimenez-Paz, J., Lozada-Castro, J., Lester, E., Williams, O., Stevens, L., & Barraza-Burgos, J. Solutions to Hazardous Wastes Issues in the Leather Industry: Adsorption of Chromium Iii and Vi from Leather Industry Wastewaters Using Activated Carbons Produced from Leather Industry Solid Wastes

This study presents the use of an innovative material to tackle hazardous wastes in the leather industry. Activated carbons produced from Leather industry waste (LIW) were used to adsorb Chromium (Cr) III and (VI), which are found in leather wastewa... Read More about Solutions to Hazardous Wastes Issues in the Leather Industry: Adsorption of Chromium Iii and Vi from Leather Industry Wastewaters Using Activated Carbons Produced from Leather Industry Solid Wastes.

A comprehensive comparative study on methylene blue removal from aqueous solution using biochars produced from rapeseed, whitewood, and seaweed via different thermal conversion technologies (2022)
Journal Article
Güleç, F., Williams, O., Kostas, E. T., Samson, A., Stevens, L. A., & Lester, E. (2022). A comprehensive comparative study on methylene blue removal from aqueous solution using biochars produced from rapeseed, whitewood, and seaweed via different thermal conversion technologies. Fuel, 330, Article 125428. https://doi.org/10.1016/j.fuel.2022.125428

This paper presents, for the first time, a comprehensive comparative analysis of the potential of using biochars from three distinctly different UK-sourced biomass feedstocks, produced via three different thermal processing techniques, to adsorb meth... Read More about A comprehensive comparative study on methylene blue removal from aqueous solution using biochars produced from rapeseed, whitewood, and seaweed via different thermal conversion technologies.

Investigating the role of solvent type and microwave selective heating on the extraction of phenolic compounds from cacao (Theobroma cacao L.) pod husk (2022)
Journal Article
Dewi, S. R., Stevens, L. A., Pearson, A. E., Ferrari, R., Irvine, D. J., & Binner, E. R. (2022). Investigating the role of solvent type and microwave selective heating on the extraction of phenolic compounds from cacao (Theobroma cacao L.) pod husk. Food and Bioproducts Processing, 134, 210-222. https://doi.org/10.1016/j.fbp.2022.05.011

Cacao pod husk (CPH) is a primary waste in the cacao industry that contains favourable natural antioxidants based on phenolic compounds. This study reported an investigation of the effect of extraction parameters to maximise the bioactive yields of C... Read More about Investigating the role of solvent type and microwave selective heating on the extraction of phenolic compounds from cacao (Theobroma cacao L.) pod husk.

Simultaneous conventional and microwave heating for the synthesis of adsorbents for CO2 capture: Comparative study to pristine technologies (2022)
Journal Article
Durán-Jiménez, G., Rodriguez, J., Kostas, E. T., Stevens, L. A., Lozada-Rodríguez, L., Binner, E., & Dodds, C. (2022). Simultaneous conventional and microwave heating for the synthesis of adsorbents for CO2 capture: Comparative study to pristine technologies. Chemical Engineering Journal, 438, Article 135549. https://doi.org/10.1016/j.cej.2022.135549

Microwave has become an attractive technology in the valorisation of renewable biomass and in the mitigation of challenges of climate change. In this work, the synergic effects of coupling microwave and mild conventional heating conditions has been i... Read More about Simultaneous conventional and microwave heating for the synthesis of adsorbents for CO2 capture: Comparative study to pristine technologies.

The effect of oil extraction on porosity and methane adsorption for dry and moisture-equilibrated shales (2022)
Journal Article
Li, W., Stevens, L. A., Meredith, W., Uguna, C. N., Vane, C. H., Zhang, B., Carr, A. D., Zheng, D., & Snape, C. E. (2022). The effect of oil extraction on porosity and methane adsorption for dry and moisture-equilibrated shales. Fuel, 316, Article 123304. https://doi.org/10.1016/j.fuel.2022.123304

The porosity and methane adsorption capacity of shale used to estimate gas in place (GIP) are affected both by moisture and oil residing in the pore structure, as well as oil naturally present from maturation, which can include contaminant drilling m... Read More about The effect of oil extraction on porosity and methane adsorption for dry and moisture-equilibrated shales.

Green and simple approach for low-cost bioproducts preparation and CO2 capture (2021)
Journal Article
Durán-Jiménez, G., Kostas, E. T., Stevens, L. A., Meredith, W., Erans, M., Hernández-Montoya, V., Buttress, A., Uguna, C. N., & Binner, E. (2021). Green and simple approach for low-cost bioproducts preparation and CO2 capture. Chemosphere, 279, Article 130512. https://doi.org/10.1016/j.chemosphere.2021.130512

This study has demonstrated, for the first time, a simple, fast and flexible microwave processing method for the simultaneous preparation of bio-products (bio-oil, bio-gas and biochar) using a methodology that avoids any form of catalyst or chemical... Read More about Green and simple approach for low-cost bioproducts preparation and CO2 capture.

Comparison of the impact of moisture on methane adsorption and nanoporosity for over mature shales and their kerogens (2021)
Journal Article
Li, W., Stevens, L. A., Uguna, C. N., Vane, C. H., Meredith, W., Tang, L., Li, Q., & 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, 237, Article 103705. https://doi.org/10.1016/j.coal.2021.103705

© 2021 Elsevier B.V. Moisture in shales under reservoir conditions adversely affects gas adsorption and nanoporosity and is also likely to impact on the contribution that kerogen makes to the methane adsorption capacity. To investigate these phenomen... Read More about Comparison of the impact of moisture on methane adsorption and nanoporosity for over mature shales and their kerogens.