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- Li, Nu, et al.
(författare)
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Methane emission reduction in China's natural gas industry : Construction of technology inventory and selection of optimal technology programs
- 2024
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Ingår i: Sustainable Production and Consumption. - : Elsevier. - 2352-5509. ; 44, s. 39-54
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Tidskriftsartikel (refereegranskat)abstract
- Methane (CH4) is a potent yet short-lived greenhouse gas (GHG), and CH4 emissions from China's natural gas industry hinder its low-carbon and high-quality development. This paper addressed this challenge by compiling emission reduction technology inventory targeting CH4 emissions from process and vented within the natural gas industry. Using a multi-objective optimization model and the NSGA-II algorithm, various technology programs were generated to minimize both emissions and costs simultaneously. These programs underwent classification using quadrants and the osculating value method to identify optimal programs for emission reduction and costeffectiveness. This paper examined 30 potential programs as samples for upstream and midstream. The study demonstrated that for decision-makers with preferences, this paper employed quadrant classification, categorizing all potential programs into three categories: "emission reduction," "cost," and "comprehensive." This categorization met the demand preferences of different decision-makers. For decision-makers lacking specific preferences, the paper identified the best emission reduction technology programs under the current target using the osculating value method. Specifically, in the upstream, the most effective program achieved a 37.85 % reduction in emissions, highlighting "Reduced Emissions Completions for Hydraulically Fractured Gas Wells" as the critical technology. In the midstream, the best program achieved a reduction efficiency of 25.80 %, with "Replacing Wet Seals with Dry Seals in Centrifugal Compressors" contributing the most to emissions reduction. This study offers guidance and illuminating reference cases for the selection of CH4 emission reduction technologies within China's natural gas industry.
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| 2. |
- Li, Nu, et al.
(författare)
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Methane emissions from the natural gas industry in China : A systematically accounting based on the bottom-up approach
- 2024
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Ingår i: Gas Science and Engineering. - : Elsevier. - 2949-9097 .- 2949-9089. ; 126
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Tidskriftsartikel (refereegranskat)abstract
- The comprehensive and meticulous assessment of methane (CH4) emissions stemming from the natural gas industry stands as an imperative endeavor in steering the natural gas industry toward a trajectory of low-carbon sustainability. This study has meticulously constructed detailed facility-level inventories for CH4 emissions within China's natural gas industry and used a bottom-up approach to fully account for both direct and indirect CH4 emissions. The findings reveal a notable increase in CH4 emissions within the natural gas industry in China, rising from 2.04 Mt in 2012 to 3.94 Mt in 2021. Regionally, Shaanxi, Sichuan, and Xinjiang emerged as the primary emission contributors in 2020, signifying a shift from northeastern and northern China to northwestern and southwestern regions during the 2012–2020 period. The fluctuations in emissions, both overall and regionally, closely align with the evolving landscape of China's natural gas sector. Projections for future CH4 emissions indicate a continued upward trajectory in tandem with industry growth. Consequently, the study emphasizes the urgency of implementing emission reduction measures in China's natural gas industry. Timely intervention is crucial to ensuring the orderly progression of the industry while effectively curbing the associated CH4 emissions.
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