Supercritical CO2-Modified Biochar as a Novel Additive for Enhancing CO2 Corrosion Resistance in Wellbore Cement: Characterization and Mechanisms
文献类型：期刊论文
| 作者 | Hakuzweyezu, Theogene2,3; Gan, Manguang2,3; Zhang, Liwei2,3; Wang, Yan3; Onyekwena, Chikezie Chimere1 |
| 刊名 | ENERGY & FUELS
 |
| 出版日期 | 2025-04-04 |
| 卷号 | 39期号:15页码:7409-7419 |
| ISSN号 | 0887-0624 |
| DOI | 10.1021/acs.energyfuels.5c00286 |
| 英文摘要 | In the wellbore system of a CO2 geological storage site, Portland cement is not adequately resistant to CO2 corrosion. Therefore, it is essential to incorporate suitable additives that can hinder CO2 corrosion in order to guarantee wellbore integrity. This study introduces supercritical CO2-modified biochar (SCBC) as a wellbore cement additive, enabling wellbore cement to be resistant to CO2 attack. Prior to exposure to CO2, the samples were initially cured in 1 wt % of NaCl solution for 14 days under the conditions of 17 MPa and 62 degrees C, mimicking typical GCS conditions. Afterward, the samples were exposed to CO2-saturated brine for 14 days, with the same pressure and temperature as the curing conditions. The performance of BC (BC with no supercritical CO2 treatment) and SCBC samples to resist CO2 attack and their influence on the hydration and strength of the wellbore cement were investigated and compared both with each other and with the control cement sample without BC (RF). The results indicate that SCBC demonstrates greater effectiveness in mitigating CO2 corrosion (with a 30.97% inhibition efficiency of carbonation) when incorporated into wellbore cement, compared with the RF. This represents a 24.48% increase in the inhibition efficiency of carbonation compared to BC with no ScCO2 modification. The compressive strength of the SCBC increased from 23.66 to 29.97 MPa, representing a 26.66% increase following 14 days of CO2 exposure. In contrast, the compressive strength of RF decreased by 28.66%, while the compressive strength of BC with no ScCO2 modification declined by 24.69% under the same conditions. The characterization results of the SCBC revealed two primary reinforcement mechanisms: (1) promoting the growth of calcite induced by carbonate formation within the cement matrix and (2) preventing CO2 infiltration due to the preloaded CO2 within the pores of the BC, along with its water-holding capacity, which aids in internal curing within the cement matrix. |
| 资助项目 | National Natural Science Foundation of China[42172315] ; National Natural Science Foundation of China[026GJHZ2024018MI] ; International Partnership Program of Chinese Academy of Sciences ; Alliance of International Science Organizations (ANSO) Scholarship for Young Talents in China |
| WOS研究方向 | Energy & Fuels ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001460209800001 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/36197]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Zhang, Liwei |
| 作者单位 | 1.Wuhan Inst Technol, Sch Civil Engn & Architecture, Wuhan 430074, Hubei, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hakuzweyezu, Theogene,Gan, Manguang,Zhang, Liwei,et al. Supercritical CO2-Modified Biochar as a Novel Additive for Enhancing CO2 Corrosion Resistance in Wellbore Cement: Characterization and Mechanisms[J]. ENERGY & FUELS,2025,39(15):7409-7419. |
| APA | Hakuzweyezu, Theogene,Gan, Manguang,Zhang, Liwei,Wang, Yan,&Onyekwena, Chikezie Chimere.(2025).Supercritical CO2-Modified Biochar as a Novel Additive for Enhancing CO2 Corrosion Resistance in Wellbore Cement: Characterization and Mechanisms.ENERGY & FUELS,39(15),7409-7419. |
| MLA | Hakuzweyezu, Theogene,et al."Supercritical CO2-Modified Biochar as a Novel Additive for Enhancing CO2 Corrosion Resistance in Wellbore Cement: Characterization and Mechanisms".ENERGY & FUELS 39.15(2025):7409-7419. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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