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Process Data set: NGH mining ; Methane hydrate ; LCA and LCC analysis (en) en zh

Key Data Set Information
Location GD-CN
Geographical representativeness description Data development site
Reference year 2009
Name
NGH mining ; Methane hydrate ; LCA and LCC analysis
Use advice for data set When utilizing data from the LCA and LCC analysis of NGH mining, consider the context of the dataset's origin, including the environmental conditions of the Northern South China Sea, technological applicability, and specific geographical factors. Comparison to regional natural gas mining practices may be necessary to fully understand environmental and economic benefits. Methodological advice includes ensuring the inclusion of critical emissions and environmental impact potentials of NGH mining in environmental cost calculations, and considering these data points when making decisions on energy and resource utilization strategies.
Technical purpose of product or process Methane hydrate, extracted via NGH mining, is mainly used as an alternative energy source to natural gas. Its extraction process, which has been demonstrated as economically viable and environmentally less impactful in comparison to conventional natural gas production, is suitable for regions with identified high-grade, shallow, and concentrated NGH deposits. The methane produced can be utilized for energy generation, heating, and as feedstock in various chemical processes.
Classification
Class name : Hierarchy level
  • ILCD: Unit processes / Energy carriers and technologies / Other non-renewable fuels
General comment on data set In this paper, LCA analysis of hydrate mining is carried out, and the most important process links and impact categories that affect the environment in its life cycle are obtained, the causes are analyzed, and reasonable improvement opinions are put forward
Copyright No
Owner of data set
Quantitative reference
Reference flow(s)
Time representativeness
Time representativeness description Publication time of literature
Technological representativeness
Technology description including background system Using life cycle assessment (LCA) and life cycle cost analysis (LCC), the environmental effects and economic benefits of marine NGH exploitation are systematically analyzed and compared with those of natural gas (NG) exploitation. The results show that the acid gas emission from NGH mining is close to zero and the greenhouse gas emission is relatively small, and the life cycle cost of NGH mining is lower than that of NG mining.
Flow diagram(s) or picture(s)
  • BrkQbgG87oNFLGxZC4DcbcHQnEg.png Image
LCI method and allocation
Type of data set Unit process, single operation
LCI Method Principle Attributional
Deviation from LCI method principle / explanations None
Deviation from modelling constants / explanations None
Data sources, treatment and representativeness
Deviation from data cut-off and completeness principles / explanations None
Data selection and combination principles Guangzhou Marine Geological Survey has carried out special hydrate investigation in Dongsha, Shenhu, Xisha and Qiongdongnan in the northern South China Sea for 9 years, and completed comprehensive investigation and research for 18 voyages. It has found a large number of cold spring carbonates and methane bacteria biota that live on natural gas. To a great extent, it can be judged that there are large leakage NGH deposits [5], which are characterized by high grade, shallow burial and concentrated distribution.
Deviation from data selection and combination principles / explanations None
Data treatment and extrapolations principles The environmental and economic performance of NGH mining are comprehensively evaluated by using the life cycle method. Effective identification of key emissions and environmental impact potential, find out the most important environmental costs, and provide quantitative scientific basis for the selection of technical schemes. It shows that the mining of NGH is feasible.
Deviation from data treatment and extrapolations principles / explanations None
Data source(s) used for this data set
Completeness
Completeness of product model No statement
Validation
Type of review
Dependent internal review
Reviewer name and institution
Data generator
Data set generator / modeller
Data entry by
Time stamp (last saved) 2024-03-20T12:54:05+08:00
Publication and ownership
UUID dfdf53a2-19f7-4f3b-b61a-6565d0fe6525
Date of last revision 2024-04-20T14:32:07.492938+08:00
Data set version 00.01.005
Permanent data set URI https://lcadata.tiangong.world/showProcess.xhtml?uuid=dfdf53a2-19f7-4f3b-b61a-6565d0fe6525&version=01.00.000&stock=TianGong
Owner of data set
Copyright No
License type Free of charge for all users and uses

Inputs

Type of flow Classification Flow Location Mean amount Resulting amount Minimum amount Maximum amount
Product flow
Other Services / Other services 0.31 m20.31 m2
General comment Well site area
Product flow
Materials production / Other mineralic materials 0.484 kg0.484 kg
General comment There is no natural gas input in the literature, assuming that the input and output during natural gas extraction process are 1:1
Product flow
Materials production / Other materials 1.0 Item(s)1.0 Item(s)
General comment Number of well site investments

Outputs

Type of flow Classification Flow Location Mean amount Resulting amount Minimum amount Maximum amount
Elementary flow
Emissions / Emissions to air / Emissions to air, unspecified 6.23E-4 kg6.23E-4 kg
General comment The original text has been distinguished as bio. Exploitation engineering, the data is distribution, and the data filled in the quantity is the result of averaging (median value)
Elementary flow
Emissions / Emissions to air / Emissions to air, unspecified 0.001 kg0.001 kg
General comment The original text has been distinguished as bio. Drilling engineering, the data is distribution, and the data filled in the quantity is the result of averaging (median value)
Elementary flow
Emissions / Emissions to air / Emissions to urban air close to ground 9.9E-4 kg9.9E-4 kg
General comment The original text has been distinguished as bio. Surface engineering, the data is distribution, and the data filled in the quantity is the result of averaging (median value)
Elementary flow
Emissions / Emissions to air / Emissions to air, unspecified 0.481 kg0.481 kg
General comment The original text has been distinguished as bio. Mining engineering, the data is distribution, and the data filled in the quantity is the result of averaging (median value)