首页|Carbon uptake by cement in China:Estimation and contribution to carbon neutrality goals

Carbon uptake by cement in China:Estimation and contribution to carbon neutrality goals

扫码查看
原文链接
  • 万方数据
  • 维普
Cement is a widely used construction material globally.Its manufacturing contributes to anthropogenic CO2 emissions significantly.However,its alkaline compounds can absorb CO2 from the surrounding environment and engage in a carbonation reaction,thereby functioning as a carbon sink.As a major cement producer and consumer,China has an important responsibility to rigorously investigate and accurately account for cement carbon uptake.This study presents a comprehensive analytical model of cement carbon uptake from China,revealing a substantial increase in carbon uptake from 1930 to 2021,peaking at 426.77 Mt CO2(95％Confidence Interval:317.67-874.33 MtCO2)in 2021.The uptake accounts for 8.10％to 45.40％of China's annual land sink and 2.51％to 4.54％of the global land sink.The cumulative carbon uptake by cement is approximately 7.06 Gt CO2(95％CI:5.22-9.44 Gt CO2)during this period,offsetting 50.7％of the total emissions(13.91 Gt CO2,95％CI:12.44-17.00 Gt CO2)from the cement industry.Notably,cement mortar contributed to most absorption(65.64％).From a life cycle perspective,the service stage of cement materials is the period where the largest CO2 sink is formed,accounting for 90.03％of the total.Therefore,the potential for carbon sequestration in cement materials and their waste is enormous.Additionally,the model improves the accuracy of cement carbon accounting,supporting both China and global carbon neutrality assessments.Thus,it is crucial for China to achieve its carbon neutrality goals sooner by prioritizing the environmental benefits of cement materials and wastes,and accelerating the development and commercialization of CO2 sequestration technologies for cement and its by-products.

CementCarbon uptakeLife cycle assessmentCarbon emission reductionCarbon neutrality

Mingjing MA、Zi HUANG、Jiaoyue WANG、Le NIU、Wenfeng ZHANG、Xiaowei XU、Fengming XI、Zhu LIU

展开 >

Institute of Applied Ecology Chinese Academy of Sciences,Shenyang 110016,China

College of Resources and Environment,University of Chinese Academy of Sciences,Beijing 100049,China

Department of Earth System Science,Tsinghua University,Beijing 100084,China

Department of Engineering Science,University of Oxford,Oxford,OX1 3,UK

Institute of Applied Ecology,Chinese Academy of Sciences,Shenyang 110016,China

Department of Earth System Science,Tsinghua University,Beijing,100084,China

展开 >

China Association for Science and TechnologyNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaInternational Support Program of the President of the Chinese Academy of SciencesBeijing Natural Science FoundationLiaoning Xingliao Talent ProjectMajor Project of the Institute of Applied Ecology,Chinese Academy of Sciences

2020201 & Y2020507187409741921005 & 419772902017 VCB 0004JQ 19032XLYC1907148IAEMP202201

2024

10.1007/s11430-023-1276-6

中国科学:地球科学(英文版)
中国科学院

中国科学:地球科学(英文版)

影响因子：1.002
ISSN：1674-7313
年,卷(期)：2024.67(6)