Publications
169 results found
Si G, Durucan S, Jamnikar S, et al., 2015, Seismic monitoring and analysis of excessive gas emissions in heterogeneous coal seams, International Journal of Coal Geology, Vol: 149, Pages: 41-54, ISSN: 0166-5162
Uncontrolled and excessive gas emissions pose a serious threat to safety in underground coal mining. In a recently completed research project, a suite of monitoring techniques were employed to assess the dynamic response of the coal seam being mined to longwall face advance at Coal Mine Velenje in Slovenia. Together with continuous monitoring of gas emissions, two seismic tomography measurement campaigns and a microseismic monitoring programme were implemented at one longwall top coal caving panel. Over 2000 microseismic events were recorded during a period of four months. Over the same period, there also was a recorded episode of relatively high gas emission in the same longwall district. In this paper, a detailed analysis of the processed microseismic data collected during the same monitoring period is presented. Specifically, the analysis includes the spatial distribution of the microseismic events with respect to the longwall face advance, the magnitude of the energy released per week and its temporal evolution. Examination of the spatial distribution of the recorded microseismic events has shown that most of the microseismic activity occurred ahead of the advancing face. Furthermore, the analysis of the gas emission and microseismic monitoring data has suggested that there is a direct correlation between microseismicity and gas emission rate, and that gas emission rate tends to reach a peak when seismic energy increases dramatically. It is believed that localised stress concentration over a relatively strong xylite-rich zone and its eventual failure, which was also identified by the seismic tomography measurements, may have triggered the heightened microseismic activity and the excessive gas emission episode experienced at the longwall panel monitored.
Andrianopoulos E, Korre A, Durucan S, 2015, Chemical Process Modelling of Underground Coal Gasification and Evaluation of Produced Gas Quality for End Use, Energy Procedia, Vol: 76, Pages: 444-453, ISSN: 1876-6102
The chemical process at the heart of Underground Coal Gasification (UCG) is the engineered injection of a blend of gasification (normally O2, air, H2O) agents into the coal resource. Established surface gasifier chemical modelling principles are adapted for modelling UCG processes. Model configurations developed in Aspen Plus are used to simulate the Linked Vertical Wells and the Controlled Retractable Injection Point gasifier layouts. Sensitivity analyses were conducted to investigate the effect of operational parameters and performance indicators. Model outputs were validated using reported UCG trial results. The gasification designs developed could form the basis for developing an integrated UCG model.
Lathouri M, Korre A, 2015, Temporal assessment of copper speciation, bioavailability and toxicity in UK freshwaters using chemical equilibrium and biotic ligand models: Implications for compliance with copper environmental quality standards, Science of the Total Environment, Vol: 538, Pages: 385-401, ISSN: 0048-9697
Although significant progress has been made in understanding how environmental factors modify the speciation, bioavailability and toxicity of metals such as copper in aquatic environments, the current methods used to establish water quality standards do not necessarily consider the different geological and geochemical characteristics of a given site and the factors that affect copper fate, bioavailability potential and toxicity. In addition, the temporal variation in the concentration and bioavailable metal fraction is also important in freshwater systems. The work presented in this paper illustrates the temporal and seasonal variability of a range of water quality parameters, and Cu speciation, bioavailability and toxicity at four freshwaters sites in the UK. Rivers Coquet, Cree, Lower Clyde and Eden (Kent) were selected to cover a broad range of different geochemical environments and site characteristics. The monitoring data used covered a period of around six years at almost monthly intervals. Chemical equilibrium modelling was used to study temporal variations in Cu speciation and was combined with acute toxicity modelling to assess Cu bioavailability for two aquatic species, Daphnia magna and Daphnia pulex. The estimated copper bioavailability, toxicity levels and the corresponding ecosystem risks were analysed in relation to key water quality parameters (alkalinity, pH and DOC). Although copper concentrations did not vary much during the sampling period or between the seasons at the different sites; copper bioavailability varied markedly. In addition, through the chronic-Cu BLM-based on the voluntary risk assessment approach, the potential environmental risk in terms of the chronic toxicity was assessed. A much higher likelihood of toxicity effects was found during the cold period at all sites. It is suggested that besides the metal (copper) concentration in the surface water environment, the variability and seasonality of other important water quality paramet
Pawar RJ, Bromhal GS, Carey JW, et al., 2015, Recent advances in risk assessment and risk management of geologic CO2 storage, International Journal of Greenhouse Gas Control, Vol: 40, Pages: 292-311, ISSN: 1750-5836
This paper gives an overview of the advances made in the field of risk assessment and risk management of geologic CO2 storage (GCS), since the publication of the IPCC Special Report on Carbon Capture and Storage in 2005. Development and operation of a wide range of demonstration projects coupled with development of new regulations for safe injection and storage of CO2 have led to development and deployment of a range of risk assessment approaches. New methods and tools have been developed for quantitative and qualitative risk assessment. These methods have been integrated effectively with monitoring and mitigation techniques and deployed in the field for small-scale field tests as well as large-scale commercial projects. An important development has been improved definition of risks, which can be broadly classed as site performance risks, long-term containment risks, public perception risks and market risks. Considerable experience has now been gained on understanding and managing site performance risks. Targeted research on containment risks and induced seismicity risks has led to improved understanding of parameters and processes influencing these risks as well as identifying key uncertainties that need to be targeted. Finally, significant progress has been made to effectively integrate communication strategies with risk management approaches to increase stakeholder confidence in effectiveness of deployed risk management approaches to manage risks.
Al-Ansari T, Korre A, Nie Z, et al., 2015, Development of a life cycle assessment tool for the assessment of food production systems within the energy, water and food nexus, Sustainable Production and Consumption, Vol: 2, Pages: 52-66, ISSN: 2352-5509
As the demand for services and products continues to increase in light of rapid population growth, the question of energy, water and food (EWF) security is of increasing importance. The systems representing the three resources are intrinsically connected and, as such, there is a need to develop assessment tools that consider their interdependences. Specifically when evaluating the environmental performance of a food production system, it is necessary to understand its life cycle. The objective of this paper is to introduce an integrated energy, water and food life cycle assessment tool that integrates EWF resources in one robust model and at an appropriate resolution. The nexus modelling tool developed is capable of providing an environmental assessment for food production systems utilising a holistic systems approach as described by a series of subsystems that constitute each of the EWF resources. A case study set in Qatar and characterised by an agriculture sub-system, which includes the production and application of fertilisers and the raising of livestock, a water sub-system represented by mechanical and thermal desalination processes and an energy sub-system, which includes fossil fuel in the form of combined cycle natural gas based energy production and solar renewable energy is used to illustrate the model function. For the nexus system analysed it is demonstrated that the food system is the largest contributor to global warming. The GWP can be reduced by up to 30% through the utilisation of solar energy to substitute fossil fuels, which, however, comes with a significant requirement for land investment.
Si G, Jamnikar S, Lazar J, et al., 2015, Monitoring and modelling of gas dynamics in multi-level longwall top coal caving of ultra-thick coal seams, part I: Borehole measurements and a conceptual model for gas emission zones, International Journal of Coal Geology, Vol: 144-145, Pages: 98-110, ISSN: 1872-7840
Si G, Shi J-Q, Durucan S, et al., 2015, Monitoring and modelling of gas dynamics in multi-level longwall top coal caving of ultra-thick coal seams, Part II: Numerical modelling, International Journal of Coal Geology, Vol: 144-145, Pages: 58-70, ISSN: 1872-7840
Manzoor S, Korre A, Durucan S, et al., 2015, Environmental and human health risk assessment of amine emissions from post combustion power plants, Publisher: AMER CHEMICAL SOC, ISSN: 0065-7727
Manzoor S, Korre A, Durucan S, et al., 2014, Atmospheric Chemistry Modelling of Amine Emissions from Post Combustion CO2 Capture Technology, 12th International Conference on Greenhouse Gas Control Technologies (GHGT), Publisher: Elsevier, Pages: 822-829, ISSN: 1876-6102
Emissions from post combustion CO2 capture plants using amine solvents are of concern due to their adverse impacts on the human health and environment. Potent carcinogens such as nitrosamines and nitramines resulting from the degradation of the amine emissions in the atmosphere have not been fully investigated. It is, therefore, imperative to determine the atmospheric fate of these amine emissions, such as their chemical transformation, deposition and transport pathways away from the emitting facility so as to perform essential risk assessments. More importantly, there is a lack of integration of amine atmospheric chemistry with dispersion studies. In this work, the atmospheric chemistry of the reference solvent for CO2 capture, monoethanolamine, and the most common degradation amines, methylamine and dimethylamine, formed as part of the post combustion capture process are considered along with dispersion calculations. Rate constants describing the atmospheric chemistry reactions of the amines of interest are obtained using theoretical quantum chemistry methods and kinetic modeling. The dispersion of these amines in the atmosphere is modeled using an air-dispersion model, ADMS 5. A worst case study on the UK's largest CO2 capture pilot plant, Ferrybridge, is carried out to estimate the maximum tolerable emissions of these amines into the atmosphere so that the calculated concentrations do not exceed guideline values and that the risk is acceptable.
Durucan S, Ahsan M, Shi J-Q, et al., 2014, Two phase relative permeabilities for gas and water in selected European coals, FUEL, Vol: 134, Pages: 226-236, ISSN: 0016-2361
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- Citations: 29
Chen D, Shi J-Q, Durucan S, et al., 2014, Gas and water relative permeability in different coals: Model match and new insights, INTERNATIONAL JOURNAL OF COAL GEOLOGY, Vol: 122, Pages: 37-49, ISSN: 0166-5162
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- Citations: 56
De La Torre Guzman J, Shi JQ, Durucan S, et al., 2014, InSAR monitoring leads to improved understanding of flow and pressure behaviour during CO2 injection at In Salah, Pages: 102-106
Building on previous work by the authors on flow and geomechanical simulations at the InSalah CO2 storage site, a coupled flow-geomechanical simulation study has been carried out to better understand the flow behaviour around one of the injectors (KB-503). In order to further improve the match of the injection pressure at KB-503 that is consistent with the InSAR surface uplift data, an in-depth analysis of the InSAR surface uplift pattern and its temporal evolution was first carried out. The picture emerging is that preferential flow paths (along the NW-SE maximum stress direction) appear to have been created, as a result of fluctuations in the injection rate from September 2005 onwards, which led to the pressurisation of the reservoir rock away from the immediate vicinity of the wellbore as reflected by elongated surface uplift pattern around KB-503. A plausible explanation is that CO2 injection has caused tensile opening of pre-existing fractures/faults in the area. Based upon this understanding, a much improved match of the BHP pressure for KB-503 was achieved by incorporating a fractured zone with dynamic transmissibility into the reservoir model based on InSAR surface uplift observations. Copyright © (2014) by the European Association of Geoscientists & Engineers. All rights reserved.
Pan I, Babaei M, Korre A, et al., 2014, A multi-period injection strategy based optimisation approach using kriging meta-models for CO<sub>2</sub> storage technologies, 12th International Conference on Greenhouse Gas Control Technologies (GHGT), Publisher: ELSEVIER SCIENCE BV, Pages: 3492-3499, ISSN: 1876-6102
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- Citations: 6
Pan I, Babaei M, Korre A, et al., 2014, Artificial Neural Network based surrogate modelling for multi-objective optimisation of geological CO<sub>2</sub> storage operations, 12th International Conference on Greenhouse Gas Control Technologies (GHGT), Publisher: ELSEVIER SCIENCE BV, Pages: 3483-3491, ISSN: 1876-6102
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- Citations: 9
Elahi N, Shah N, Korre A, et al., 2014, Multi-period least cost optimisation model of an integrated carbon dioxide capture transportation and storage infrastructure in the UK, 12th International Conference on Greenhouse Gas Control Technologies (GHGT), Publisher: ELSEVIER SCIENCE BV, Pages: 2655-2662, ISSN: 1876-6102
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- Citations: 22
Korre A, Nie Z, Durucan S, et al., 2014, The effect of market and leasing conditions on the techno-economic performance of complex CO<sub>2</sub> transport and storage value chains, 12th International Conference on Greenhouse Gas Control Technologies (GHGT), Publisher: ELSEVIER SCIENCE BV, Pages: 7225-7233, ISSN: 1876-6102
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- Citations: 7
Nie Z, Korre A, Durucan S, 2014, Life Cycle Modelling of Alternative Gas-fuelled Power Plants with CO<sub>2</sub> Capture and Storage, 24TH EUROPEAN SYMPOSIUM ON COMPUTER AIDED PROCESS ENGINEERING, PTS A AND B, Vol: 33, Pages: 985-990, ISSN: 1570-7946
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- Citations: 2
Castro-Molinare J, Korre A, Durucan S, 2014, Sustainability Analysis of Copper Extraction and Processing using Life Cycle Analysis Methods: a Case Study in the North of Chile, 24TH EUROPEAN SYMPOSIUM ON COMPUTER AIDED PROCESS ENGINEERING, PTS A AND B, Vol: 33, Pages: 1861-1866, ISSN: 1570-7946
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- Citations: 4
Pan I, Korre A, Durucan S, 2014, Integrating Queuing Theory and Finite Automata in a Systems Framework for Financial Risk Modelling of Engineering Process Systems, 24TH EUROPEAN SYMPOSIUM ON COMPUTER AIDED PROCESS ENGINEERING, PTS A AND B, Vol: 33, Pages: 1297-1302, ISSN: 1570-7946
Al-Ansari T, Korre A, Nie Z, et al., 2014, Development of a Life Cycle Assessment Model for the Analysis of the Energy, Water and Food Nexus, 24TH EUROPEAN SYMPOSIUM ON COMPUTER AIDED PROCESS ENGINEERING, PTS A AND B, Vol: 33, Pages: 1039-1044, ISSN: 1570-7946
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- Citations: 11
Govindan R, Babaei M, Korre A, et al., 2014, CO<sub>2</sub> storage uncertainty and risk assessment for the post-closure period at the Ketzin pilot site in Germany, 12th International Conference on Greenhouse Gas Control Technologies (GHGT), Publisher: ELSEVIER SCIENCE BV, Pages: 4758-4765, ISSN: 1876-6102
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- Citations: 8
Babaei M, Pan I, Korre A, et al., 2014, Evolutionary optimisation for CO<sub>2</sub> storage design using upscaled models: Application on a proximal area of the Forties Fan System in the UK Central North Sea, 12th International Conference on Greenhouse Gas Control Technologies (GHGT), Publisher: ELSEVIER SCIENCE BV, Pages: 5349-5356, ISSN: 1876-6102
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- Citations: 3
Chen D, Shi J-Q, Durucan S, et al., 2014, Remediation of CO<sub>2</sub> leakage using pressure gradient reversal method: A numerical modelling study, 12th International Conference on Greenhouse Gas Control Technologies (GHGT), Publisher: ELSEVIER SCIENCE BV, Pages: 4630-4637, ISSN: 1876-6102
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- Citations: 1
Syed A, Shi J-Q, Durucan S, et al., 2014, Experimental and numerical investigations into CO<sub>2</sub> interactions with well infrastructure and its impact on long term well integrity, 12th International Conference on Greenhouse Gas Control Technologies (GHGT), Publisher: ELSEVIER SCIENCE BV, Pages: 5707-5714, ISSN: 1876-6102
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- Citations: 7
Shi J-Q, Korre A, Chen D, et al., 2014, A methodology for CO<sub>2</sub> storage system risk and uncertainty assessment, 12th International Conference on Greenhouse Gas Control Technologies (GHGT), Publisher: ELSEVIER SCIENCE BV, Pages: 4750-4757, ISSN: 1876-6102
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- Citations: 1
Durucan S, Korre A, Shi J-Q, et al., 2014, TOPS: Technology options for coupled underground coal gasification and CO<sub>2</sub> capture and storage, 12th International Conference on Greenhouse Gas Control Technologies (GHGT), Publisher: ELSEVIER SCIENCE BV, Pages: 5827-5835, ISSN: 1876-6102
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- Citations: 21
Babaei M, Govindan R, Korre A, et al., 2014, CO<sub>2</sub> storage potential at Forties oilfield and the surrounding Paleocene sandstone aquifer accounting for leakage risk through abandoned wells, 12th International Conference on Greenhouse Gas Control Technologies (GHGT), Publisher: ELSEVIER SCIENCE BV, Pages: 5164-5171, ISSN: 1876-6102
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- Citations: 2
Guzman JDLT, Babaei M, Shi J-Q, et al., 2014, Coupled flow-geomechanical performance assessment of CO<sub>2</sub> storage sites using the Ensemble Kalman Filter, 12th International Conference on Greenhouse Gas Control Technologies (GHGT), Publisher: ELSEVIER SCIENCE BV, Pages: 3475-3482, ISSN: 1876-6102
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- Citations: 6
Syed A, Pantin B, Durucan S, et al., 2014, The use of polymer-gel solutions for remediation of potential CO<sub>2</sub> leakage from storage reservoirs, 12th International Conference on Greenhouse Gas Control Technologies (GHGT), Publisher: ELSEVIER SCIENCE BV, Pages: 4638-4645, ISSN: 1876-6102
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- Citations: 18
Neele F, Grimstad A-A, Fleury M, et al., 2014, MiReCOL: developing corrective measures for CO<sub>2</sub> storage, 12th International Conference on Greenhouse Gas Control Technologies (GHGT), Publisher: ELSEVIER SCIENCE BV, Pages: 4658-4665, ISSN: 1876-6102
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- Citations: 5
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