The Experts below are selected from a list of 2040078 Experts worldwide ranked by ideXlab platform

Ahmed Alnouss - One of the best experts on this subject based on the ideXlab platform.

  • a comparison of steam and oxygen fed biomass gasification through a techno economic Environmental Study
    Energy Conversion and Management, 2020
    Co-Authors: Ahmed Alnouss, Gordon Mckay, Tareq Alansari
    Abstract:

    Abstract Economically, fossil fuels remain the main source of energy despite their high emissions of greenhouse gases. However, biomass, a renewable fuel with CO2 neutrality, has experienced widespread attention as a potential contributor to sustainable development of the energy sector. Gasification is an important thermochemical process that converts biomass feedstock into H2-rich combustible gases, which are favoured by wide downstream applications. The use of pure steam or oxygen as a gasifying agent is preferred to increase the yield of combustible gases. Consequently, hydrogen is utilised as an important intermediary in the generation of value-added products such as urea, fuels and power. This Study compares the biomass gasification using oxygen-only and steam-only gasifying agents. Moreover, the Study examines a poly-generation system that consumes biomass feedstock of multiple sources to produce high grade Fisher-Tropsch liquids, methanol, urea, and power. To achieve this aim, four Aspen Plus simulation flowsheets are developed considering both gasifiying agents and compared utilising the built-in economic and Environmental capabilities. The results obtained from the economic and Environmental evaluation demonstrate the excellence of steam-only biomass gasification in providing profitable and cleaner products. The methanol production using steam gasification is the most economical solution with a net profit per input of $0.12 per kg of biomass input and the lowest emissions pathway with 0.68 kg of CO2-e per biomass input. The relative nature of the results can offer diverse perspectives depending on the market situation of the products. Consequently, analysing the results relative to production capacity, power generation using steam gasification achieves a net profit approximated at $0.80 per kg of product, whilst methanol production using steam gasification remains the lowest Environmental impact solution with 2.32 kg of CO2-e per output product.

  • A techno-economic-Environmental Study evaluating the potential of oxygen-steam biomass gasification for the generation of value-added products
    Energy Conversion and Management, 2019
    Co-Authors: Ahmed Alnouss, Gordon Mckay, Tareq Al-ansari
    Abstract:

    Abstract The production of renewable chemicals and fuels is driving modern society towards a type of sustainable development which involves a decreasing dependency on fossil fuels and the minimisation of waste. Biomass, a waste by-product from the urban environment, is a carbon dioxide neutral organic fuel that can potentially serve as a feedstock for the production of sustainable power and heat. Gasification is preferred over the other thermal conversion options for biomass processing whereby the product synthesis gas can be utilised to power generators/turbines and generate clean energy, ammonia and methanol. Incidentally, efficient and economically sound biomass driven supply chains can be integrated into an existing petrochemical infrastructure. Moreover, the potential production volumes of fuels and green chemicals can also be increased by the addition of multiple biomass sources, thereby creating potential positive scale effects. This Study proposes a new poly-generation process that utilises multiple sources of biomass feedstock to produce high quality urea, methanol, Fisher-Tropsch liquids and power. Four flowsheet configurations are simulated using Aspen Plus software and the built-in capabilities of the activated analysis using Aspen Process Economic Analyzer and Aspen Energy Analyzer to perform the economic, energy and Environmental impact calculations. The results demonstrate that the methanol production technique is the most economic process pathway with a net profit of approximately $0.035 per kg of biomass input, whilst the urea process pathway presents the lowest Environmental impact solution with approximately 0.71 kg of CO2-e per kg of biomass input. These results are relative and can be analysed from different perspectives based on the market demand of the products and their applications and local need. For instance, considering at the economic and Environmental indicators relative to the production capacity, production of liquid fuels achieve net profits of approximately $0.27 per kg of product, whilst urea production demonstrates the lowest Environmental emissions of approximately 3.93 kg of CO2-e per kg of product.

Rodolfo Dufolopez - One of the best experts on this subject based on the ideXlab platform.

  • economical and Environmental analysis of grid connected photovoltaic systems in spain
    Renewable Energy, 2006
    Co-Authors: Jose L Bernalagustin, Rodolfo Dufolopez
    Abstract:

    In this article an economic and Environmental Study is carried out on PV solar energy installations connected to the Spanish electrical grid system. The Study has been performed on installations situated in the city of Zaragoza (with an irradiation value approximately equal to the average value for Spain).

  • economical and Environmental analysis of grid connected photovoltaic systems in spain
    Renewable Energy, 2006
    Co-Authors: Jose L Bernalagustin, Rodolfo Dufolopez
    Abstract:

    Abstract In this article an economic and Environmental Study is carried out on PV solar energy installations connected to the Spanish electrical grid system. The Study has been performed on installations situated in the city of Zaragoza (with an irradiation value approximately equal to the average value for Spain). Initially, an economical Study is performed, proposing different scenarios where different values of interest rate and energy tariffs are considered. The following parameters are used to determine the profitability of a PV installation: the Net Present Value and the Pay-Back Period. Furthermore, the Environmental benefits of PV systems connected to the grid have been evaluated. This has been accomplished using the Life Cycle Analysis theory of the systems, calculating the recuperation time of the invested energy, the contamination or emissions avoided and the externality costs. Finally the possible effects of the application of the Kyoto Protocol have been studied.

Marc A Rosen - One of the best experts on this subject based on the ideXlab platform.

  • exergetic life cycle assessment of a hydrogen production process
    International Journal of Hydrogen Energy, 2012
    Co-Authors: Ahmet Ozbilen, Ibrahim Dincer, Marc A Rosen
    Abstract:

    Abstract Exergetic life cycle assessment (ExLCA) is applied with life cycle assessment (LCA) to a hydrogen production process. This comparative Environmental Study examines a nuclear-based hydrogen production via thermochemical water splitting using a copper–chlorine cycle. LCA, which is an analytical tool to identify, quantify and decrease the overall Environmental impact of a system or a product, is extended to ExLCA. Exergy efficiencies and air pollution emissions are evaluated for all process steps, including the uranium processing, nuclear and hydrogen production plants. LCA results are presented in four categories: acidification potential, eutrophication potential, global warming potential and ozone depletion potential. A parametric Study is performed for various plant lifetimes. The ExLCA results indicate that the greatest irreversibility is caused by uranium processing. The primary contributor of the life cycle irreversibility of the nuclear-based hydrogen production process is fuel (uranium) processing, for which the exergy efficiency is 26.7% and the exergy destruction is 2916.3 MJ. The lowest global warming potential per megajoule exergy of hydrogen is 5.65 g CO2-eq achieved a plant capacity of 125,000 kg H2/day. The corresponding value for a plant capacity of 62,500 kg H2/day is 5.75 g CO2-eq.

  • a comparative life cycle analysis of hydrogen production via thermochemical water splitting using a cu cl cycle
    International Journal of Hydrogen Energy, 2011
    Co-Authors: Ahmet Ozbilen, Ibrahim Dincer, Marc A Rosen
    Abstract:

    Abstract In this paper, a comparative Environmental Study is reported of the Cu–Cl water-splitting cycle with various other hydrogen production methods: the sulphur–iodine (S–I) water-splitting cycle, high temperature water electrolysis, conventional steam reforming of natural gas and hydrogen production from renewable resources. The investigation uses life cycle assessment (LCA), which is an analytical tool to identify and quantify Environmentally critical phases during the life cycle of a system or a product and/or to evaluate and decrease the overall Environmental impact of the system or product. The LCA results for the hydrogen production processes indicate that the thermochemical cycles have lower Environmental impacts while steam reforming of natural gas has the highest.

Gordon Mckay - One of the best experts on this subject based on the ideXlab platform.

  • a comparison of steam and oxygen fed biomass gasification through a techno economic Environmental Study
    Energy Conversion and Management, 2020
    Co-Authors: Ahmed Alnouss, Gordon Mckay, Tareq Alansari
    Abstract:

    Abstract Economically, fossil fuels remain the main source of energy despite their high emissions of greenhouse gases. However, biomass, a renewable fuel with CO2 neutrality, has experienced widespread attention as a potential contributor to sustainable development of the energy sector. Gasification is an important thermochemical process that converts biomass feedstock into H2-rich combustible gases, which are favoured by wide downstream applications. The use of pure steam or oxygen as a gasifying agent is preferred to increase the yield of combustible gases. Consequently, hydrogen is utilised as an important intermediary in the generation of value-added products such as urea, fuels and power. This Study compares the biomass gasification using oxygen-only and steam-only gasifying agents. Moreover, the Study examines a poly-generation system that consumes biomass feedstock of multiple sources to produce high grade Fisher-Tropsch liquids, methanol, urea, and power. To achieve this aim, four Aspen Plus simulation flowsheets are developed considering both gasifiying agents and compared utilising the built-in economic and Environmental capabilities. The results obtained from the economic and Environmental evaluation demonstrate the excellence of steam-only biomass gasification in providing profitable and cleaner products. The methanol production using steam gasification is the most economical solution with a net profit per input of $0.12 per kg of biomass input and the lowest emissions pathway with 0.68 kg of CO2-e per biomass input. The relative nature of the results can offer diverse perspectives depending on the market situation of the products. Consequently, analysing the results relative to production capacity, power generation using steam gasification achieves a net profit approximated at $0.80 per kg of product, whilst methanol production using steam gasification remains the lowest Environmental impact solution with 2.32 kg of CO2-e per output product.

  • A techno-economic-Environmental Study evaluating the potential of oxygen-steam biomass gasification for the generation of value-added products
    Energy Conversion and Management, 2019
    Co-Authors: Ahmed Alnouss, Gordon Mckay, Tareq Al-ansari
    Abstract:

    Abstract The production of renewable chemicals and fuels is driving modern society towards a type of sustainable development which involves a decreasing dependency on fossil fuels and the minimisation of waste. Biomass, a waste by-product from the urban environment, is a carbon dioxide neutral organic fuel that can potentially serve as a feedstock for the production of sustainable power and heat. Gasification is preferred over the other thermal conversion options for biomass processing whereby the product synthesis gas can be utilised to power generators/turbines and generate clean energy, ammonia and methanol. Incidentally, efficient and economically sound biomass driven supply chains can be integrated into an existing petrochemical infrastructure. Moreover, the potential production volumes of fuels and green chemicals can also be increased by the addition of multiple biomass sources, thereby creating potential positive scale effects. This Study proposes a new poly-generation process that utilises multiple sources of biomass feedstock to produce high quality urea, methanol, Fisher-Tropsch liquids and power. Four flowsheet configurations are simulated using Aspen Plus software and the built-in capabilities of the activated analysis using Aspen Process Economic Analyzer and Aspen Energy Analyzer to perform the economic, energy and Environmental impact calculations. The results demonstrate that the methanol production technique is the most economic process pathway with a net profit of approximately $0.035 per kg of biomass input, whilst the urea process pathway presents the lowest Environmental impact solution with approximately 0.71 kg of CO2-e per kg of biomass input. These results are relative and can be analysed from different perspectives based on the market demand of the products and their applications and local need. For instance, considering at the economic and Environmental indicators relative to the production capacity, production of liquid fuels achieve net profits of approximately $0.27 per kg of product, whilst urea production demonstrates the lowest Environmental emissions of approximately 3.93 kg of CO2-e per kg of product.

Tareq Alansari - One of the best experts on this subject based on the ideXlab platform.

  • a comparison of steam and oxygen fed biomass gasification through a techno economic Environmental Study
    Energy Conversion and Management, 2020
    Co-Authors: Ahmed Alnouss, Gordon Mckay, Tareq Alansari
    Abstract:

    Abstract Economically, fossil fuels remain the main source of energy despite their high emissions of greenhouse gases. However, biomass, a renewable fuel with CO2 neutrality, has experienced widespread attention as a potential contributor to sustainable development of the energy sector. Gasification is an important thermochemical process that converts biomass feedstock into H2-rich combustible gases, which are favoured by wide downstream applications. The use of pure steam or oxygen as a gasifying agent is preferred to increase the yield of combustible gases. Consequently, hydrogen is utilised as an important intermediary in the generation of value-added products such as urea, fuels and power. This Study compares the biomass gasification using oxygen-only and steam-only gasifying agents. Moreover, the Study examines a poly-generation system that consumes biomass feedstock of multiple sources to produce high grade Fisher-Tropsch liquids, methanol, urea, and power. To achieve this aim, four Aspen Plus simulation flowsheets are developed considering both gasifiying agents and compared utilising the built-in economic and Environmental capabilities. The results obtained from the economic and Environmental evaluation demonstrate the excellence of steam-only biomass gasification in providing profitable and cleaner products. The methanol production using steam gasification is the most economical solution with a net profit per input of $0.12 per kg of biomass input and the lowest emissions pathway with 0.68 kg of CO2-e per biomass input. The relative nature of the results can offer diverse perspectives depending on the market situation of the products. Consequently, analysing the results relative to production capacity, power generation using steam gasification achieves a net profit approximated at $0.80 per kg of product, whilst methanol production using steam gasification remains the lowest Environmental impact solution with 2.32 kg of CO2-e per output product.