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Records with Keyword: Life Cycle Analysis
Comparison of Steel Manufacturing Off-Gas Utilization Methods via Life Cycle Analysis
July 31, 2020 (v1)
Subject: Other
Keywords: blast furnace gas, coke oven gas, combined cycle power plant, Life Cycle Analysis, methanol production
This study utilizes life cycle analysis to compare three steel manufacturing off-gas utilization systems: a status quo system, which produces electricity via a low-pressure steam turbine; a combined cycle power plant (CCPP) system, which produces electricity using gas and steam turbines; and a methanol (MeOH) system, which converts coke oven gas (COG) and blast furnace gas (BFG) into MeOH (CBMeOH). This research seeks to compare the environmental impacts of each system based on equivalent raw material inputs. Since the systems have different products, system expansion is used to ensure that they have the same outputs and are therefore comparable. The system boundary consists of a combination of cradle-to-gate and gate-to-gate boundaries. The environmental effects of each system are compared at five locations—Ontario, the USA, Finland, Mexico, and China—using TRACI, CML-IA baseline, ReCiPe2016, and IMPACT2002+ in SimaPro v9. The results show that in Ontario, Finland, and China, CBMeOH s... [more]
Comprehensive Environmental Impact Assessment of a Combined Petroleum Coke and Natural Gas to Fischer-Tropsch Diesel Process
Thomas A. Adams II
March 13, 2020 (v1)
Subject: Other
In this study, a well-to-wheels life cycle assessment was conducted to determine the environmental impacts from disposing of petroleum coke by converting it into liquid fuel. Specifically, three processes for converting petroleum coke and natural gas to Fischer Tropsch diesel were investigated, both with and without carbon capture and sequestration (CCS). Impact categories were calculated using the EPA’s TRACI 2.1 US-Canada 2008 midpoint method in SimaPro software. In addition, the impact of grid emissions on the overall process was assessed using two representative Canadian locations with high (Alberta) and low (Ontario) grid emissions. The results of each impact category were compared among the designs and against conventional petroleum and oil-sands derived diesel. Key findings showed that the proposed designs when operated using CCS in the low-emissions-grid location had lower life cycle GHG emissions than conventional petroleum and oil-sands derived diesel. Nevertheless, the vario... [more]
Comparison of Steel Manufacturing Off-Gas Utilization Methods via Life Cycle Analysis
Lingyan Deng, Thomas Adams
March 4, 2020 (v1)
Subject: Other
Keywords: Blast furnace gas, Coke oven gas, Combined cycle power plant, Life Cycle Analysis, Methanol production, SimaPro
This is a submission of source file of the life cycle analysis of steel manufacturing off-gas utilization systems using SimaPro V9. It includes five locations: Ontario, the USA, Finland, Mexico, and China.
Systems Design of a Petroleum Coke IGCC Power Plant: Technical, Economic, and Life cycle Perspectives
Ikenna Joseph Okeke, Thomas A Adams II
July 12, 2019 (v1)
Keywords: Carbon Dioxide Capture, Electricity, Gasification, IGCC, Life Cycle Analysis, Petroleum Coke
The petroleum coke gasification integrated gasification combined cycle power plant (petcoke-IGCC) is a promising avenue for disposal of the ever-growing amount of stockpiled petroleum coke. In this work, we present a novel techno-economic and life cycle assessment of the process operated with carbon capture and sequestration. The proposed petcoke-to-electricity plant is designed and simulated in Aspen Plus v10. The proposed power plant was compared against coal integrated gasification combined cycle (coal-IGCC) and supercritical pulverized coal power plants operated with carbon capture and sequestration. The results showed that although the efficiency of the coal-IGCC plant is higher than the petcoke-IGCC plant, the higher energy density of the petcoke and lower resource costs were such that the levelized cost of electricity of petcoke-IGCC was lower than coal-IGCC. Furthermore, the feed flow rate of petcoke to the petcoke-IGCC process is approximately 15% lower than the coal feed rate... [more]
Maximizing Our Impact: A call for the standardization of techno-economic analyses for sustainable energy systems design research
Thomas A Adams II
July 17, 2019 (v3)
Keywords: eco-Technoeconomic Analysis, Life Cycle Analysis, Standardization, Technoeconomic Analysis
This presentation makes the case for the development of a new ISO standard for conduction eco-technoeconomic analyses (eTEAs) within the field of energy systems engineering and chemical process systems engineering. The talk provides a motivating example of a recent study that showed how standardization of eTEAs made it possible to make fair comparisons between different types of power plants using carbon capture and sequestration by using eTEAs reported in the literature that have been converted to certain standards. That lead to informed decisions which were not possible without standardization methods, because it major variables are controlled such that analyses can focus on the value of the process concept itself rather than external factors like size, financing, and case-specific assumptions. Then, the talk outlines how the proposed ISO standards would work, their goals and scope, examples of standard practices, methods, and assumptions that could be used and what they might look l... [more]
Finding the Signal in the Noise: Determining North America’s best path forward for sustainable energy
Thomas A Adams II
August 1, 2019 (v3)
Keywords: Calcium Looping, Carbon Dioxide Capture, Chemical Looping, Life Cycle Analysis, Meta-Study, Oxyfuels, Postcombustion Capture, Solid Oxide Fuel Cells, Technoeconomic Analysis
One of the largest engineering challenges of our time is finding technical solutions that permit the use of our energy resources in a sustainable way. In order to achieve meaningful and positive change, new energy systems must adhere to the triple bottom line of sustainability. This means that new technical solutions must be economically, socio-politically, and environmentally sustainable, such that they can be rapidly adopted and accepted. The engineering literature is full of a great many technical proposals for new energy systems, but it turns out to be quite hard to objectively look at them all, see through the hype, and decide which are the best and most promising technologies in which to invest our research and development dollars. In this talk, I will present a case study with the results of our recent meta-study covering over 100 candidate electricity generation systems with carbon dioxide capture, in order to determine which are the most promising classes of technologies. I wi... [more]
Understanding the Contribution of Mining and Transportation to the Total Life Cycle Impacts of Coal Exported from the United States
Michele Mutchek, Gregory Cooney, Gavin Pickenpaugh, Joe Marriott, Timothy Skone
January 7, 2019 (v1)
Subject: Energy Policy
Keywords: Asian markets, climate change, coal exports, electricity, greenhouse gas emissions, impact assessment, Life Cycle Analysis, Powder River Basin, power generation
The construction of two marine bulk terminals in the Pacific Northwest region of the United States are currently under review and would open up additional thermal coal exports to Asia on the order of almost 100 million additional tonnes per year. The major exporters of coal to Asian markets include Indonesia and Australia. This life cycle analysis (LCA) seeks to understand the role of transportation and mining in the cradle-to-busbar environmental impacts of coal exports from the Powder River Basin (PRB) to Asian countries, when compared to the competitor countries. This LCA shows that: (1) the most significant greenhouse gas (GHG) impacts in the cradle-to-busbar life cycle of coal for power generation come from the combustion of coal in a power plant, even when 90% carbon capture is applied; (2) for non-GHG air impacts, power plant combustion impacts are less dominant and variations in upstream impacts (mining and transportation) are more important; and (3) when comparing impacts betw... [more]
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