The Experts below are selected from a list of 120 Experts worldwide ranked by ideXlab platform
Chris Chapman - One of the best experts on this subject based on the ideXlab platform.
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Liquefied natural gas for the UK: a life cycle assessment
The International Journal of Life Cycle Assessment, 2017Co-Authors: Carla Tagliaferri, Roland Clift, Paola Lettieri, Chris ChapmanAbstract:Purpose Liquefied natural gas (LNG) is expected to become an important component of the UK’s energy supply because the national hydrocarbon reserves on the continental shelf have started diminishing. However, use of any Carbon-Based Fuel runs counter to mitigation of greenhouse gas emissions (GHGs). Hence, a broad environmental assessment to analyse the import of LNG to the UK is required. Methods A cradle to gate life cycle assessment has been carried out of a specific but representative case: LNG imported to the UK from Qatar. The analysis covers the supply chain, from gas extraction through to distribution to the end-user, assuming state-of-the-art facilities and ships. A sensitivity analysis was also conducted on key parameters including the energy requirements of the liquefaction and vaporisation processes, Fuel for propulsion, shipping distance, tanker volume and composition of raw gas. Results and discussion All environmental indicators of the CML methodology were analysed. The processes of liquefaction, LNG transport and evaporation determine more than 50% of the cradle to gate global warming potential (GWP). When 1% of the total gas delivered is vented as methane emissions leakage throughout the supply chain, the GWP increases by 15% compared to the GWP of the base scenario. The variation of the GWP increases to 78% compared to the base scenario when 5% of the delivered gas is considered to be lost as vented emissions. For all the scenarios analysed, more than 75% of the total acidification potential (AP) is due to the sweetening of the natural gas before liquefaction. Direct emissions from transport always determine between 25 and 49% of the total eutrophication potential (EP) whereas the operation and maintenance of the sending ports strongly influences the fresh water aquatic ecotoxicity potential (FAETP). Conclusions The study highlights long-distance transport of LNG and natural gas processing, including sweetening, liquefaction and vaporisation, as the key operations that strongly affect the life cycle impacts. Those cannot be considered negligible when the environmental burdens of the LNG supply chain are considered. Furthermore, the effect of possible fugitive methane emissions along the supply chain are critical for the impact of operations such as extraction, liquefaction, storage before transport, transport itself and evaporation.
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Liquefied natural gas for the UK: a life cycle assessment
International Journal of Life Cycle Assessment, 2017Co-Authors: Carla Tagliaferri, Roland Clift, Paola Lettieri, Chris ChapmanAbstract:Purpose Liquefied natural gas (LNG) is expected to become an important component of the UK’s energy supply because the national hydrocarbon reserves on the continental shelf have started diminishing. However, use of any Carbon-Based Fuel runs counter to mitigation of greenhouse gas emissions (GHGs). Hence, a broad environmental assessment to analyse the import of LNG to the UK is required.
Carla Tagliaferri - One of the best experts on this subject based on the ideXlab platform.
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Liquefied natural gas for the UK: a life cycle assessment
The International Journal of Life Cycle Assessment, 2017Co-Authors: Carla Tagliaferri, Roland Clift, Paola Lettieri, Chris ChapmanAbstract:Purpose Liquefied natural gas (LNG) is expected to become an important component of the UK’s energy supply because the national hydrocarbon reserves on the continental shelf have started diminishing. However, use of any Carbon-Based Fuel runs counter to mitigation of greenhouse gas emissions (GHGs). Hence, a broad environmental assessment to analyse the import of LNG to the UK is required. Methods A cradle to gate life cycle assessment has been carried out of a specific but representative case: LNG imported to the UK from Qatar. The analysis covers the supply chain, from gas extraction through to distribution to the end-user, assuming state-of-the-art facilities and ships. A sensitivity analysis was also conducted on key parameters including the energy requirements of the liquefaction and vaporisation processes, Fuel for propulsion, shipping distance, tanker volume and composition of raw gas. Results and discussion All environmental indicators of the CML methodology were analysed. The processes of liquefaction, LNG transport and evaporation determine more than 50% of the cradle to gate global warming potential (GWP). When 1% of the total gas delivered is vented as methane emissions leakage throughout the supply chain, the GWP increases by 15% compared to the GWP of the base scenario. The variation of the GWP increases to 78% compared to the base scenario when 5% of the delivered gas is considered to be lost as vented emissions. For all the scenarios analysed, more than 75% of the total acidification potential (AP) is due to the sweetening of the natural gas before liquefaction. Direct emissions from transport always determine between 25 and 49% of the total eutrophication potential (EP) whereas the operation and maintenance of the sending ports strongly influences the fresh water aquatic ecotoxicity potential (FAETP). Conclusions The study highlights long-distance transport of LNG and natural gas processing, including sweetening, liquefaction and vaporisation, as the key operations that strongly affect the life cycle impacts. Those cannot be considered negligible when the environmental burdens of the LNG supply chain are considered. Furthermore, the effect of possible fugitive methane emissions along the supply chain are critical for the impact of operations such as extraction, liquefaction, storage before transport, transport itself and evaporation.
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Liquefied natural gas for the UK: a life cycle assessment
International Journal of Life Cycle Assessment, 2017Co-Authors: Carla Tagliaferri, Roland Clift, Paola Lettieri, Chris ChapmanAbstract:Purpose Liquefied natural gas (LNG) is expected to become an important component of the UK’s energy supply because the national hydrocarbon reserves on the continental shelf have started diminishing. However, use of any Carbon-Based Fuel runs counter to mitigation of greenhouse gas emissions (GHGs). Hence, a broad environmental assessment to analyse the import of LNG to the UK is required.
Thomas Gennett - One of the best experts on this subject based on the ideXlab platform.
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tuning carbon based Fuel cell catalyst support structures via nitrogen functionalization i investigation of structural and compositional modification of highly oriented pyrolytic graphite model catalyst supports as a function of nitrogen implantation
Journal of Physical Chemistry C, 2011Co-Authors: Svitlana Pylypenko, Aimee Queen, Tim S Olson, Arrelaine A Dameron, Kevin Oneill, K C Neyerlin, Bryan S Pivovar, Huyen N Dinh, David S Ginley, Thomas GennettAbstract:Surface modification and doping of graphitic-carbon catalyst support materials in Fuel cell systems, particularly via nitrogen functionalization, has been shown to improve catalyst performance and durability through the optimization of catalyst–support interactions. To ascertain the nature of these interactions, Raman and X-ray photoelectron spectroscopy were used to study the structural and chemical modifications that nitrogen ion beam implantation caused to highly oriented pyrolitic graphite (HOPG) model catalyst support systems. Ion implantation doses explored in this work ranged over 2 orders of magnitude from 9.0 × 1014 to 9.6 × 1016 ions cm–2. Low doses of nitrogen result in a large amount of structural damage with little incorporation of nitrogen. However, it was found that with increasing dosage the incremental increase in structural damage was marginal, while the percentage of nitrogen on the HOPG surface continued to increase significantly until both the level of damage and amount of nitrogen in...
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tuning carbon based Fuel cell catalyst support structures via nitrogen functionalization ii investigation of durability of pt ru nanoparticles supported on highly oriented pyrolytic graphite model catalyst supports as a function of nitrogen implantat
Journal of Physical Chemistry C, 2011Co-Authors: Svitlana Pylypenko, Aimee Queen, Tim S Olson, Arrelaine A Dameron, Kevin Oneill, K C Neyerlin, Bryan S Pivovar, Huyen N Dinh, David S Ginley, Thomas GennettAbstract:Nitrogen functionalization of Carbon-Based support materials for low-temperature Fuel cell catalysts has been shown to improve catalyst–support interactions and therefore enhance both the performan...
Paola Lettieri - One of the best experts on this subject based on the ideXlab platform.
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Liquefied natural gas for the UK: a life cycle assessment
The International Journal of Life Cycle Assessment, 2017Co-Authors: Carla Tagliaferri, Roland Clift, Paola Lettieri, Chris ChapmanAbstract:Purpose Liquefied natural gas (LNG) is expected to become an important component of the UK’s energy supply because the national hydrocarbon reserves on the continental shelf have started diminishing. However, use of any Carbon-Based Fuel runs counter to mitigation of greenhouse gas emissions (GHGs). Hence, a broad environmental assessment to analyse the import of LNG to the UK is required. Methods A cradle to gate life cycle assessment has been carried out of a specific but representative case: LNG imported to the UK from Qatar. The analysis covers the supply chain, from gas extraction through to distribution to the end-user, assuming state-of-the-art facilities and ships. A sensitivity analysis was also conducted on key parameters including the energy requirements of the liquefaction and vaporisation processes, Fuel for propulsion, shipping distance, tanker volume and composition of raw gas. Results and discussion All environmental indicators of the CML methodology were analysed. The processes of liquefaction, LNG transport and evaporation determine more than 50% of the cradle to gate global warming potential (GWP). When 1% of the total gas delivered is vented as methane emissions leakage throughout the supply chain, the GWP increases by 15% compared to the GWP of the base scenario. The variation of the GWP increases to 78% compared to the base scenario when 5% of the delivered gas is considered to be lost as vented emissions. For all the scenarios analysed, more than 75% of the total acidification potential (AP) is due to the sweetening of the natural gas before liquefaction. Direct emissions from transport always determine between 25 and 49% of the total eutrophication potential (EP) whereas the operation and maintenance of the sending ports strongly influences the fresh water aquatic ecotoxicity potential (FAETP). Conclusions The study highlights long-distance transport of LNG and natural gas processing, including sweetening, liquefaction and vaporisation, as the key operations that strongly affect the life cycle impacts. Those cannot be considered negligible when the environmental burdens of the LNG supply chain are considered. Furthermore, the effect of possible fugitive methane emissions along the supply chain are critical for the impact of operations such as extraction, liquefaction, storage before transport, transport itself and evaporation.
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Liquefied natural gas for the UK: a life cycle assessment
International Journal of Life Cycle Assessment, 2017Co-Authors: Carla Tagliaferri, Roland Clift, Paola Lettieri, Chris ChapmanAbstract:Purpose Liquefied natural gas (LNG) is expected to become an important component of the UK’s energy supply because the national hydrocarbon reserves on the continental shelf have started diminishing. However, use of any Carbon-Based Fuel runs counter to mitigation of greenhouse gas emissions (GHGs). Hence, a broad environmental assessment to analyse the import of LNG to the UK is required.
Roland Clift - One of the best experts on this subject based on the ideXlab platform.
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Liquefied natural gas for the UK: a life cycle assessment
The International Journal of Life Cycle Assessment, 2017Co-Authors: Carla Tagliaferri, Roland Clift, Paola Lettieri, Chris ChapmanAbstract:Purpose Liquefied natural gas (LNG) is expected to become an important component of the UK’s energy supply because the national hydrocarbon reserves on the continental shelf have started diminishing. However, use of any Carbon-Based Fuel runs counter to mitigation of greenhouse gas emissions (GHGs). Hence, a broad environmental assessment to analyse the import of LNG to the UK is required. Methods A cradle to gate life cycle assessment has been carried out of a specific but representative case: LNG imported to the UK from Qatar. The analysis covers the supply chain, from gas extraction through to distribution to the end-user, assuming state-of-the-art facilities and ships. A sensitivity analysis was also conducted on key parameters including the energy requirements of the liquefaction and vaporisation processes, Fuel for propulsion, shipping distance, tanker volume and composition of raw gas. Results and discussion All environmental indicators of the CML methodology were analysed. The processes of liquefaction, LNG transport and evaporation determine more than 50% of the cradle to gate global warming potential (GWP). When 1% of the total gas delivered is vented as methane emissions leakage throughout the supply chain, the GWP increases by 15% compared to the GWP of the base scenario. The variation of the GWP increases to 78% compared to the base scenario when 5% of the delivered gas is considered to be lost as vented emissions. For all the scenarios analysed, more than 75% of the total acidification potential (AP) is due to the sweetening of the natural gas before liquefaction. Direct emissions from transport always determine between 25 and 49% of the total eutrophication potential (EP) whereas the operation and maintenance of the sending ports strongly influences the fresh water aquatic ecotoxicity potential (FAETP). Conclusions The study highlights long-distance transport of LNG and natural gas processing, including sweetening, liquefaction and vaporisation, as the key operations that strongly affect the life cycle impacts. Those cannot be considered negligible when the environmental burdens of the LNG supply chain are considered. Furthermore, the effect of possible fugitive methane emissions along the supply chain are critical for the impact of operations such as extraction, liquefaction, storage before transport, transport itself and evaporation.
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Liquefied natural gas for the UK: a life cycle assessment
International Journal of Life Cycle Assessment, 2017Co-Authors: Carla Tagliaferri, Roland Clift, Paola Lettieri, Chris ChapmanAbstract:Purpose Liquefied natural gas (LNG) is expected to become an important component of the UK’s energy supply because the national hydrocarbon reserves on the continental shelf have started diminishing. However, use of any Carbon-Based Fuel runs counter to mitigation of greenhouse gas emissions (GHGs). Hence, a broad environmental assessment to analyse the import of LNG to the UK is required.