家庭用ガスコンロからのメタン排出:その重要性と削減可能性
Xiangang Xu1, Xinyue Zhong1, Ye Wang1,2
1School of Architecture and Design, Harbin Institute of Technology, Key Laboratory of Cold Region Urban and Rural Human Settlement Environment Science and Technology, Ministry of Industry and Information Technology, Harbin 150000, China.
Environmental science & technology
|January 28, 2026
まとめ
家庭用天然ガスコンロはメタン排出の重要な発生源であり、主に不完全燃焼とバルブ漏れに起因する。ストーブ入口バルブ(SIV)を閉じるなどの簡単な削減戦略は、これらの排出量を大幅に削減できる。
科学分野:
- 環境科学;大気化学;エネルギー政策
背景:
- 天然ガス供給連鎖は、メタン(CH4)排出削減に大きな可能性を提供している。;末端ユーザー、特に家庭用天然ガスコンロからの排出は、十分に理解されていない。;メタンは強力な温室効果ガスであり、実質的な気候影響を持つ。
研究 の 目的:
- 中国における家庭用天然ガスコンロからのメタン排出量を定量化する。;これらの排出源の主な発生源を特定する。;ストーブ関連のメタン排出量を削減するための潜在的な削減戦略を評価する。
主な方法:
- 中国の62台の家庭用ストーブからのメタン排出量のフィールド測定。;不完全燃焼とバルブ漏れからの寄与を含む排出係数の分析。;排出率とストーブの年数および使用頻度の間の相関分析。;全国排出量の予測と削減シナリオの評価。
主要な成果:
- 平均排出係数は0.20 kg CH4/ストーブ/年であった。;不完全燃焼は、運転中の総排出量の63%を占めた。;ストーブの年数と使用頻度は、高出力使用時の排出率と正の相関があった。;家庭用ストーブからの年間全国排出量は、2025年までに66 Ggに達すると予測される。;ストーブ入口バルブ(SIV)の漏れは、サイクル外排出の主要な発生源である。
結論:
- 家庭用ストーブは、十分に特徴付けられていないメタン排出の重要な発生源である。;不使用期間中にSIVを閉じると、排出量を3分の1削減できる。;この簡単な削減策を実施すると、2026年から2030年の間に最大0.13 Tgのメタン排出を回避できる可能性がある。;調査結果は、排出インベントリの改善とターゲットを絞ったメタン削減戦略の開発に不可欠なデータを提供する。
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