地热能储存与CO2封存和利用的一体化框架
Article
刘月亮, 胡婷, 芮振华, 张政, 都凯, 杨涛, Birol Dindoruk, Erling Halfdan Stenby, Farshid Torabi, Andrey Afanasyevc
《工程（英文）》
2023年
第30卷
第11期
页码 121-130
doi:
10.1016/j.eng.2022.12.010
摘要：
此外，利用CO2羽流进行地热储能可通过将CO2储存于地质体中来缓解温室效应。本文提出了一个协同地热能储能和二氧化碳封存利用的一体化框架：CO2首先被注入到地热层以进行能量积累。然后，将产生的高能CO2引入到目标油藏中，用于CO2利用和地热能储存。最后，将CO2有效地封存在地质油藏体中。根据对模拟CO2场地的封存潜力的评估，CO2注入110年后，地质体的利用率将高达91.2%，场地内CO2的最终注入量将高达9.529 经过1000年封存，超临界相在CO2封存中占主导地位，其次是液相，然后是矿化相。此外，由于残余油的存在，用于溶解捕获的CO2封存量显著增加。
关键词：
地热能储存
CO2封存
碳中和
大规模
CO2利用
Newly-modeled graphene-based ternary nanocomposite for the magnetophotocatalytic reduction of CO2 with
《化学科学与工程前沿（英文）》
2022年
第16卷
第10期
页码 1438-1459
doi:
10.1007/s11705-022-2166-y
摘要：
The development of CO2 into hydrocarbon fuels has emerged as a green method that could help mitigate global warning. The novel structured photocatalyst is a promising material for use in a photocatalytic and magneto-electrochemical method that fosters the reduction of CO2 by suppressing the recombination of electron−hole pairs and effectively transferring the electrons to the surface for the chemical reaction of CO2 reduction. In our study, we have developed a novel-structured AgCuZnS2–graphene–TiO2 to analyze its catalytic activity toward the selective evolution of CO2. The selectivity of each nanocomposite substantially enhanced the activity of the AgCuZnS2–graphene–TiO2 ternary nanocomposite due to the successful interaction, and the selectivity of the final product was improved to a value 3 times higher than that of the pure AgCuZnS2 and 2 times higher than those of AgCuZnS2–graphene and AgCuZnS2–TiO2 under ultra-violet (UV)-light (λ = 254 nm) irradiation in the photocatalytic process. The electrochemical CO2 reduction test was also conducted to analyze the efficacy of the AgCuZnS2–graphene–TiO2 when used as a working electrode in laboratory electrochemical cells. The electrochemical process was conducted under different experimental conditions, such as various scan rates (mV·s–1), under UV-light and with a 0.07 T magnetic-core. The evolution of CO2 substantially improved under UV-light (λ = 254 nm) and with 0.07 T magnetic-core treatment; these improvements were attributed to the facts that the UV-light activated the electron-transfer pathway and the magnetic core controlled the pathway of electron-transmission/prevention to protect it from chaotic electron movement. Among all tested nanocomposites, AgCuZnS2–graphene–TiO2 absorbed the CO2 most strongly and showed the best ability to transfer the electron to reduce the CO2 to methanol. We believe that our newly-modeled ternary nanocomposite opens up new opportunities for the evolution of CO2 to methanol through an electrochemical and photocatalytic process.
关键词：
ternary nanocomposite
photocatalytic
electrochemical CO2 reduction
UV-light
magnetic core
Tuning porosity of coal-derived activated carbons for CO2 adsorption
《化学科学与工程前沿（英文）》
2022年
第16卷
第9期
页码 1345-1354
doi:
10.1007/s11705-022-2155-1
摘要：
A simple method was developed to tune the porosity of coal-derived activated carbons, which provided a model adsorbent system to investigate the volumetric CO2 adsorption performance. Specifically, the method involved the variation of the activation temperature in a K2CO3 induced chemical activation process which could yield activated carbons with defined microporous (< 2 nm, including ultra-microporous < 1 nm) and meso-micro-porous structures. CO2 adsorption isotherms revealed that the microporous activated carbon has the highest measured CO2 adsorption capacity (6.0 mmol∙g–1 at 0 °C and 4.1 mmol∙g–1 at 25 °C), whilst ultra-microporous activated carbon with a high packing density exhibited the highest normalized capacity with respect to packing volume (1.8 mmol∙cm−3 at 0 °C and 1.3 mmol∙cm–3 at 25 °C), which is significant. Both experimental correlation analysis and molecular dynamics simulation demonstrated that (i) volumetric CO2 adsorption capacity is directly proportional to the ultra-micropore volume, and (ii) an increase in micropore sizes is beneficial to improve the volumetric capacity, but may lead a low CO2 adsorption density and thus low pore space utilization efficiency. The adsorption experiments on the activated carbons established the criterion for designing CO2 adsorbents with high volumetric adsorption capacity.
关键词：
coal-derived activated carbons
porosity
CO2 adsorption
molecular dynamics
Impacts of CO2 and H2S on the risk of hydrate formation during pipeline transport of natural gas
Solomon A. Aromada, Bjørn Kvamme
《化学科学与工程前沿（英文）》
2019年
第13卷
第3期
页码 616-627
doi:
10.1007/s11705-019-1795-2
摘要：
Evaluation of maximum content of water in natural gas before water condenses out at a given temperature and pressure is the initial step in hydrate risk analysis during pipeline transport of natural gas. The impacts of CO and H S in natural gas on the maximum mole-fractions of water that can be tolerated during pipeline transport without the risk of hydrate nucleation has been studied using our novel thermodynamic scheme. Troll gas from the North Sea is used as a reference case, it contains very negligible amount of CO and no H S. Varying mole-fractions of CO and H S were introduced into the Troll gas, and the effects these inorganic impurities on the water tolerance of the system were evaluated. It is observed that CO does not cause any distinguishable impact on water tolerance of the system, but H S does. Water tolerance decreases with increase in concentration of H S. The impact of ethane on the system was also investigated. The maximum mole-fraction of water permitted in the gas to ensure prevention of hydrate formation also decreases with increase in the concentration of C H like H S. H S has the most impact, it tolerates the least amount of water among the components studied.
关键词：
hydrate
hydrogen Sulphide
CO2
dew point
pipeline
Theoretical and experimental study on the fluidity performance of hard-to-fluidize carbon nanotubes-based CO2
《化学科学与工程前沿（英文）》
2022年
第16卷
第10期
页码 1460-1475
doi:
10.1007/s11705-022-2159-x
摘要：
Carbon nanotubes-based materials have been identified as promising sorbents for efficient CO2 capture in fluidized beds, suffering from insufficient contact with CO2 for the high-level CO2 capture capacity. This study focuses on promoting the fluidizability of hard-to-fluidize pure and synthesized silica-coated amine-functionalized carbon nanotubes. The novel synthesized sorbent presents a superior sorption capacity of about 25 times higher than pure carbon nanotubes during 5 consecutive adsorption/regeneration cycles. The low-cost fluidizable-SiO2 nanoparticles are used as assistant material to improve the fluidity of carbon nanotubes-based sorbents. Results reveal that a minimum amount of 7.5 and 5 wt% SiO2 nanoparticles are required to achieve an agglomerate particulate fluidization behavior for pure and synthesized carbon nanotubes, respectively. Pure carbon nanotubes + 7.5 wt% SiO2 and synthesized carbon nanotubes + 5 wt% SiO2 indicates an agglomerate particulate fluidization characteristic, including the high-level bed expansion ratio, low minimum fluidization velocity (1.5 and 1.6 cm·s–1), high Richardson−Zakin index (5.2 and 5.3 > 5), and low Π value (83.2 and 84.8 < 100, respectively). Chemical modification of carbon nanotubes causes not only enhanced CO 2 uptake capacity but also decreases the required amount of silica additive to reach a homogeneous fluidization behavior for synthesized carbon nanotubes sorbent.
关键词：
CO2 capture
CNT-based sorbents
fluidization
SiO2 nanoparticles
fluidized bed reactors
Encapsulation of 2-amino-2-methyl-1-propanol with tetraethyl orthosilicate for CO2 capture
Sidra Rama, Yan Zhang, Fideline Tchuenbou-Magaia, Yulong Ding, Yongliang Li
《化学科学与工程前沿（英文）》
2019年
第13卷
第4期
页码 672-683
doi:
10.1007/s11705-019-1856-6
摘要：
Carbon capture is widely recognised as an essential strategy to meet global goals for climate protection. Although various CO capture technologies including absorption, adsorption and membrane exist, they are not yet mature for post-combustion power plants mainly due to high energy penalty. Hence researchers are concentrating on developing non-aqueous solvents like ionic liquids, CO -binding organic liquids, nanoparticle hybrid materials and microencapsulated sorbents to minimize the energy consumption for carbon capture. This research aims to develop a novel and efficient approach by encapsulating sorbents to capture CO in a cold environment. The conventional emulsion technique was selected for the microcapsule formulation by using 2-amino-2-methyl-1-propanol (AMP) as the core sorbent and silicon dioxide as the shell. This paper reports the findings on the formulated microcapsules including key formulation parameters, microstructure, size distribution and thermal cycling stability. Furthermore, the effects of microcapsule quality and absorption temperature on the CO loading capacity of the microcapsules were investigated using a self-developed pressure decay method. The preliminary results have shown that the AMP microcapsules are promising to replace conventional sorbents.
关键词：
carbon capture
microencapsulated sorbents
emulsion technique
low temperature adsorption and absorption
碳捕集利用与封存中的金属腐蚀问题研究： 进展与挑战
向勇 ,原玉 ,周佩 ,刘广胜 ,吕伟 ,李明星 ,张春霞 ,周庆军 ,赵雪会 ,闫伟
《中国工程科学》
2023年
第25卷
第3期
页码 197-208
doi:
10.15302/J-SSCAE-2023.07.026
摘要：
深入研究碳捕集、利用与封存（CCUS）技术中的金属腐蚀问题产生的机理和影响，对有效应对和解决捕集、运输、利用与封存系统中存在的材料腐蚀失效问题至关重要分析了可能存在的金属腐蚀类型及其主要影响因素，并对其带来的挑战进行了梳理，得出了以下主要结论：对于有机胺捕集系统，吸收剂降解机理及降解产物对腐蚀过程的影响较为复杂，部分降解产物对金属腐蚀有抑制作用；密相CO2输送管道的内腐蚀问题不容忽视，控制水分含量是控制该腐蚀问题的关键；CO2驱油利用与封存系统井筒管材在超高CO2分压、碳源杂质、高矿化度地层水、微生物和应力等多因素的长周期耦合作用下，出现腐蚀失效导致CO2最后，本文对未来需迫切开展的研究方向进行了展望，包括不同碳源杂质对各子系统的腐蚀影响研究、长期封存条件下井筒区域材料降解规律研究以及CCUS系统腐蚀防护技术研究等。
关键词：
碳捕集、利用与封存；碳源杂质；腐蚀环境特点；腐蚀影响因素；超临界CO2
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Newly-modeled graphene-based ternary nanocomposite for the magnetophotocatalytic reduction of CO2 with
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Tuning porosity of coal-derived activated carbons for CO2 adsorption
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Impacts of CO2 and H2S on the risk of hydrate formation during pipeline transport of natural gas
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