海洋地质前沿2025，Vol.41Issue(3)：89-98,10.DOI:10.16028/j.1009-2722.2024.273
不同实验条件下利用二氧化碳合成片钠铝石的固碳研究
Carbon sequestration research of synthesizing dawsonite using CO2 under different experimental conditions
摘要
Abstract
Mineral trapping of CO2 is the most durable and stable form of geological storage.As a natural CO2 tracer mineral,the formation of dawsonite is closely related to CO2 infusion,and it also be an important carbon fixation mineral for CO2 geological storage.The condition of massive and stable presence of dawsonite in geolo-gical background is a key issue that constrains the CO2 mineralization capture,and is also an important influen-cing factor in the search for CO2 geological burial sites.To explore the conditions for the rapid synthesis of dawsonite with CO2,we conducted comparative experiments for three main influencing factors of temperature(100/120/140/160/180/200℃),pH(8.5/9/9.5/10/10.5),and reaction time(6/12 h).Based on scanning electron mi-croscopy,X-ray diffraction analysis was conducted to clarify the optimal conditions for the synthesis of dawson-ite.The experiments suggested that in the range of pH 8.5-10.5 and temperature 100-180℃,the products were all pure dawsonite,and the synthesis amount showed a trend of increasing and then decreasing with the increase of pH and temperature.At 200℃,the crystallinity of dawsonite decreased and the content of pseudo boehmite in-creased.The prolongation of reaction time did not have an obvious promotion effect on the quality of the products,and the prolongation of reaction time at 200℃would accelerate the dissolution of dawsonite instead.Overall,140℃and pH 9.5 are the best conditions for the synthesis of dawsonite from carbon dioxide and probably the ideal conditions for geological sequestration of carbon dioxide.关键词
片钠铝石/CO2水岩相互作用/水热合成/最佳条件/CO2矿物封存Key words
dawsonite/CO2-water-rock interaction/hydrothermal synthesis/optimal conditions/CO2 mineral se-questration分类
海洋科学引用本文复制引用
曲希玉,温竞凯,袁勇,施凯腾,陈铁鑫..不同实验条件下利用二氧化碳合成片钠铝石的固碳研究[J].海洋地质前沿,2025,41(3):89-98,10.基金项目
山东省自然科学基金"咸水层储集体CO2的固化过程及主要固碳矿物的富集条件研究"(ZR2024MD078) （ZR2024MD078）
中国地质调查局项目"我国东部海域地质碳封存选区调查评价"(DD202503023) （DD202503023）
国家自然科学基金"南黄海CSDP-2井二叠系砂岩储层致密化过程及其对油气充注事件的响应"(42206234) （42206234）
自然资源部科技战略研究项目"海底地质碳封存战略研究"(2023-ZL-18) （2023-ZL-18）
