Fundamental Study and Reactor Development on Absorption and Desorption of Carbon Dioxide Using High Thmperature Molten Salt Slurry

高温熔盐浆液吸收解吸二氧化碳的基础研究及反应器研制

• 批准号: 18560735
• 负责人: TERASAKA Koichi
• 金额: $ 2.49万
• 依托单位: Keio University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2006
• 资助国家: 日本
• 起止时间: 2006 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18560735/
• 关键词: Carbon Dioxide; Molten Salt; Slurry Bubble Column; Lithium Silicate

The study has been done for 2007-2008 to obtain the fundamental data in terms of the absorption and desorption of carbon dioxide using a circulating slurry bubble column in which lithium silicate fine particles are suspended in molten lithium-potassium carbonate at high temperature.That was summarized as follows :1. Analysis of dissolution and stripping behavior of CO_2 bubble into molten salt slurryThe lithium silicate fine particles and molten Li-K-carbonate were prepared in the hot reactor. The model flue gas which has 20% CO_2 and 80% N_2 was fed into the reactor. The absorbed CO_2 was observed by measuring mass balance of CO_2 in the reactor when the mass of lithium silicate and the composition of molten salt were changed. Maximum absorption rate and solubility of CO_2 in molten salt were measured by the time course of CO_2 concentration in effluent gas from the reactor. The effects of influent gas flow rate, composition in molten salt and slurry concentration on gas bubble behavior were investigated.On the other hand, the stripping behavior of CO_2 was investigated when the reactor was heated up to the desorption temperature. The effects of the mass of lithium silicate, temperature and heating rate on the stripping rate of CO_2 were discussed. In this study, the limited process was the CO_2 molecular transfer in the molten salt, that is, CO_2 dissolution from bubbles governed the overall reaction rate.2. Hydrodynamics in circulating slurry bubble columnTo experimentally simulate the gas-liquid-solid hydrodynamics in high temperature reactor under the room temperature, the cold model was used. The 1 micron PVC particles was used as instead of lithium silicate particles and the surfactant aqueous solution was used as a imitation liquid of molten salt. By using a designed circulating slurry bubble column, the gas holdup and the circulation rate of liquid were investigated to know the fundamental information to apply for industry.

2007-2008年利用循环浆态鼓泡塔吸收和解吸二氧化碳的基础数据。在循环浆态鼓泡塔中，硅酸锂微粒在高温下悬浮在熔融的锂-碳酸钾中。主要内容如下：1.分析CO_2气泡在熔融盐浆中的溶解和解吸行为。模型烟气中CO_2含量为20%，N_2含量为80%。改变硅酸锂的质量和熔盐的组成，通过测量反应器内CO2的质量平衡来观察吸收的CO2。通过测定反应器出气中CO_2浓度的时间历程，测定了CO_2在熔盐中的最大吸收速率和溶解度。考察了进气流量、熔盐组成和料浆浓度对气泡行为的影响，同时考察了反应器加热到脱附温度时CO2的反萃行为。讨论了硅酸锂质量、温度和升温速率对CO2反萃速率的影响。在本研究中，限制过程是熔盐中的CO_2分子转移，即CO_2从气泡中的溶解控制着整个反应速率。循环浆体鼓泡塔内流体动力学研究采用冷态模型对高温反应器内的气液固三相流体力学进行了实验模拟。用1微米的聚氯乙烯颗粒代替硅酸锂颗粒，用表面活性剂水溶液作为熔盐的模拟液。利用自行设计的循环浆液鼓泡塔，对气含率和液体循环速率进行了研究，为工业应用提供了依据。

项目成果

リチウム複合酸化物微粒子を懸濁させた高温スラリー気泡塔によるCO2回収

使用悬浮锂复合氧化物颗粒的高温浆液泡罩塔回收 CO2

• 发表时间: 2006
• 作者: Yuta;Ozaki;尾崎 裕太
• 通讯作者: 尾崎 裕太

リチウムシリケート懸濁スラリーによる高温燃焼排ガスからのCO2回収

利用硅酸锂悬浮浆料从高温燃烧废气中回收CO2

• 发表时间: 2007
• 作者: 和才 怜史;尾崎 裕太;小林 大祐;寺坂 宏一;尾崎 裕太
• 通讯作者: 尾崎 裕太

CO_2 recovery Using High Temperature Bubble Columns Suspended Lithium Complex Oxide Particulates

使用高温鼓泡塔回收悬浮锂复合氧化物颗粒的 CO_2

• 发表时间: 2006
• 作者: Yuta;Ozaki
• 通讯作者: Ozaki

Absorption and Stripping of CO_2 with Molten Salt Slurry in Bubble Column at High Temperature

高温鼓泡塔中熔盐浆液吸收汽提CO_2

• 发表时间: 2006
• 期刊: Chemical Engineering and Technology 29
• 作者: Koichi;Terasaka
• 通讯作者: Terasaka

Absorption and Stripping of CO2 with Molten Salt Slurry in Bubble Colump at High Temperature

高温气泡塔中熔盐浆液吸收汽提CO2

• 发表时间: 2006
• 期刊: Chemical Engineering and Technology 29
• 作者: Koichi Terasaka