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Dynamic modelling and simulation of a post-combustion CO capture process for coal-fired power plants

《化学科学与工程前沿(英文)》 2022年 第16卷 第2期   页码 198-209 doi: 10.1007/s11705-021-2057-7

摘要: Solvent-based post-combustion capture technologies have great potential for CO2 mitigation in traditional coal-fired power plants. Modelling and simulation provide a low-cost opportunity to evaluate performances and guide flexible operation. Composed by a series of partial differential equations, first-principle post-combustion capture models are computationally expensive, which limits their use in real time process simulation and control. In this study, we propose a first-principle approach to develop the basic structure of a reduced-order model and then the dominant factor is used to fit properties and simplify the chemical and physical process, based on which a universal and hybrid post-combustion capture model is established. Model output at steady state and trend at dynamic state are validated using experimental data obtained from the literature. Then, impacts of liquid-to-gas ratio, reboiler power, desorber pressure, tower height and their combination on the absorption and desorption effects are analyzed. Results indicate that tower height should be designed in conjunction with the flue gas flow, and the gas-liquid ratio can be optimized to reduce the reboiler power under a certain capture target.

关键词: CO2 capture     post-combustion capture     simulation     dominant factor    

Application of membrane separation technology in post-combustion carbon dioxide capture process

Mo LI,Xiaobin JIANG,Gaohong HE

《化学科学与工程前沿(英文)》 2014年 第8卷 第2期   页码 233-239 doi: 10.1007/s11705-014-1408-z

摘要: Membrane separation technology is a possible breakthrough in post-combustion carbon dioxide capture process. This review first focuses on the requirements for CO separation membrane, and then outlines the existing competitive materials, promising preparation methods and processes to achieve desirable CO selectivity and permeability. A particular emphasis is addressed on polyimides, poly (ethylene oxide), mixed-matrix membrane, thermally-rearranged polymer, fixed site carrier membrane, ionic liquid membrane and electrodialysis process. The advantages and drawbacks of each of materials and methods are discussed. Research threads and methodology of CO separation membrane and the key issue in this area are concluded

关键词: membranes     carbon dioxide capture     separation     polymers     post-combustion    

Integrated adsorption and absorption process for post-combustion CO

Gongkui Xiao, Penny Xiao, Andrew Hoadley, Paul Webley

《化学科学与工程前沿(英文)》 2021年 第15卷 第3期   页码 483-492 doi: 10.1007/s11705-020-1964-3

摘要: This study explored the feasibility of integrating an adsorption and solvent scrubbing process for post-combustion CO capture from a coal-fired power plant. This integrated process has two stages: the first is a vacuum swing adsorption (VSA) process using activated carbon as the adsorbent, and the second stage is a solvent scrubber/stripper system using monoethanolamine (30 wt-%) as the solvent. The results showed that the adsorption process could enrich CO in the flue gas from 12 to 50 mol-% with a CO recovery of >90%, and the concentrated CO stream fed to the solvent scrubber had a significantly lower volumetric flowrate. The increased CO concentration and reduced feed flow to the absorption section resulted in significant reduction in the diameter of the solvent absorber, bringing the size of the absorber from uneconomically large to readily achievable domain. In addition, the VSA process could also remove most of the oxygen initially existed in the feed gas, alleviating the downstream corrosion and degradation problems in the absorption section. The findings in this work will reduce the technical risks associated with the state-of-the art solvent absorption technology for CO capture and thus accelerate the deployment of such technologies to reduce carbon emissions.

关键词: vacuum swing adsorption     monoethanolamine     post-combustion     CO2 capture     integrated process    

聚乙烯胺促进传递膜用于燃烧后二氧化碳捕集——从材料到工艺的挑战和前景 Perspective

何雪忠

《工程(英文)》 2021年 第7卷 第1期   页码 124-131 doi: 10.1016/j.eng.2020.11.001

摘要:

由于气体分离膜具有高能效、相对较低的成本和环境影响,通过气体分离膜捕集二氧化碳(CO2)变得越来越具有吸引力。在过去的十年中,人们开发了基于聚乙烯胺(PVAm)的促进传递(FT)膜来捕集CO2。本文讨论了聚乙烯胺促进传递膜应用于发电厂和水泥厂的燃烧后CO2捕集从材料到工艺的挑战。我们可以基于先前中试示范中获得的经验来指导设计其他类型的膜捕集CO2。特别强调了组件和工艺设计对实现高性能膜系统的重要性。此外,过程模拟和成本估算的结果表明,三级膜系统对于实现95%的高CO2纯度是可行的。我们发现单位CO2的捕集成本在很大程度上取决于所需的CO2捕集率,在50%的中等CO2捕集率下,捕集每吨CO2的成本为63.7美元。因此,我们发现FT膜系统对于部分CO2捕集更具竞争力。

关键词: 促进传递膜     烟道气排放     中空纤维     二氧化碳捕集     过程模拟    

年15万吨规模燃煤电厂燃烧后二氧化碳捕集示范工程

崔青汝, 赵瑞, 王天堃, 张帅, 黄艳, 顾永正, 徐冬

《工程(英文)》 2022年 第14卷 第7期   页码 22-26 doi: 10.1016/j.eng.2022.04.006

关键词: 工程成就    

碳配额市场下以乙醇胺溶液进行碳捕集的电厂的优化竞标和运行:基于强化学习的Sarsa时间差分算法的解决

李子昂, 王美宏, 丁正桃

《工程(英文)》 2017年 第3卷 第2期   页码 257-265 doi: 10.1016/J.ENG.2017.02.014

摘要:

对于处在碳配额市场条件下以乙醇胺(MEA) 进行碳捕集的燃煤电厂,本文应用了基于强化学习的Sarsa 时间差分算法为其自行搜寻一种统一的竞标和运行策略。电厂的决策者的目的被定义为最大化电厂寿命下的贴现累计利润。其中,我们引入以下两个限制条件:一是碳捕集的高能耗和电力生产之间的权衡;二是碳排放交易市场中竞得的碳配额数量与电力生产导致的实际碳排放量的近似相等。本文给出了三个案例方便研究。第一个案例中,我们展示了Sarsa 算法将收敛到一个确定且优化的竞标和运行策略。第二个案例中,相互独立设计的运行和竞标策略与统一设计的运行和竞标策略相互比较,以表明加入了随时间变化、市场导向的碳捕集水平后,Sarsa 算法将有助于电厂决策者获得更高的贴现累计利润。第三个案例则引入了处在同一碳配额市场的另一电厂作为原电厂的竞争对手。两家电厂设置了相同的发电和二氧化碳捕集设备,但新电厂采用不同的策略获得利润。比较两家电厂的贴现累计利润,结果表明:采用Sarsa 学习算法、找到统一的竞标和运行策略的原电厂会更具竞争力。

关键词: 电厂     燃烧后碳捕集     化学吸收     碳配额市场     决策优化     强化学习    

Techno-economic comparison of three technologies for pre-combustion CO

Simon Roussanaly, Monika Vitvarova, Rahul Anantharaman, David Berstad, Brede Hagen, Jana Jakobsen, Vaclav Novotny, Geir Skaugen

《化学科学与工程前沿(英文)》 2020年 第14卷 第3期   页码 436-452 doi: 10.1007/s11705-019-1870-8

摘要: This paper compares the techno-economic performances of three technologies for CO capture from a lignite-based IGCC power plant located in the Czech Republic: (1) Physical absorption with a Rectisol-based process; (2) Polymeric CO -selective membrane-based capture; (3) Low-temperature capture. The evaluations show that the IGCC plant with CO capture leads to costs of electricity between 91 and 120 €·MWh , depending on the capture technology employed, compared to 65 €·MWh for the power plant without capture. This results in CO avoidance costs ranging from 42 to 84 €· , mainly linked to the losses in net power output. From both energy and cost points of view, the low-temperature and Rectisol based CO capture processes are the most efficient capture technologies. Furthermore, partial CO capture appears as a good mean to ensure early implementation due to the limited increase in CO avoidance cost when considering partial capture. To go beyond the two specific CO -selective membranes considered, a cost/membrane property map for CO -selective membranes was developed. This map emphasise the need to develop high performance membrane to compete with solvent technology. Finally, the cost of the whole CCS chain was estimated at 54 €· once pipeline transport and storage are taken into consideration.

关键词: carbon capture and storage (CCS)     techno-economic comparison     pre-combustion capture     physical solvent     low-temperature capture    

Reaction mechanism of arsenic capture by a calcium-based sorbent during the combustion of arsenic-contaminated

Mei Lei, Ziping Dong, Ying Jiang, Philip Longhurst, Xiaoming Wan, Guangdong Zhou

《环境科学与工程前沿(英文)》 2019年 第13卷 第2期 doi: 10.1007/s11783-019-1110-y

摘要:

Pilot-scale combustion is required to treat arsenic-enriched biomass in China.

CaO addition to arsenic-enriched biomass reduces arsenic emission.

CaO captures arsenic via chemical adsorption to form Ca3(AsO4)2.

关键词: Arsenic contamination     Phytoremediation     Emission control     Calcium-based sorbent     Biomass disposal     Pilot-scale combustion    

The capture of carbon dioxide by transition metal aluminates, calcium aluminate, calcium zirconate, calcium

Ganesh TILEKAR, Kiran SHINDE, Kishor KALE, Reshma RASKAR, Abaji GAIKWAD

《化学科学与工程前沿(英文)》 2011年 第5卷 第4期   页码 477-491 doi: 10.1007/s11705-011-1107-y

摘要: The capture of CO by transition metal (Mn, Ni, Co and Zn) aluminates, calcium aluminate, calcium zirconate, calcium silicate and lithium zirconate was carried out at pre- and post-combustion temperatures. The prepared metal adsorbents were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), surface area analysis and acidity/alkalinity measurements. The different experimental variables affecting the adsorbents ability to capture CO , such as the mol ratio of metal ions, the pressure of CO , the exposure time and the temperature of the adsorbent were also investigated. Calcium zirconate captured 13.85 wt-% CO at 650°C and 2.5 atm and calcium silicate captured 14.31 wt-% at 650°C. Molecular sieves (13X) and carbon can only capture a negligible amount of CO at high temperatures (300°C–650°C). However, the mixed metal oxides captured reasonable amount of CO at these higher temperatures. In addition, calcium aluminate, calcium zirconate, calcium silicate and lithium zirconate adsorbents captured CO at both pre and post-combustion temperatures. The trend for the amount of captured carbon dioxide over the adsorbents was calcium aluminate

关键词: captured CO2     pre-combustion temperature     characterization     calcium silicate     calcium zirconate    

Capture of carbon dioxide over porous solid adsorbents lithium silicate, lithium aluminate and magnesiumaluminate at pre-combustion temperatures

P. V. Korake, A. G. Gaikwad

《化学科学与工程前沿(英文)》 2011年 第5卷 第2期   页码 215-226 doi: 10.1007/s11705-010-1012-9

摘要: The capturing process for carbon dioxide over porous solid adsorbents such as lithium silicate, lithium aluminate, and magnesium aluminate at pre- combustion temperatures was studied. Lithium silicate was prepared by the sol gel and solid fusion methods. The lithium silicate adsorbent was characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), nuclear magnetic resonance (NMR), and surface area. The capturing of carbon dioxide over lithium silicate, lithium aluminate, and magnesium aluminate was explored at different experimental conditions such as exposure time, temperature variation, and exposure carbon dioxide pressure. The capturing process for carbon dioxide was investigated over these adsorbents with variation of their metal mole ratios. The effect of the addition of (promoter) sodium, potassium, and cesium in the lithium silicate adsorbent was explored to investigate the variation of the capture of carbon dioxide over these adsorbents.

关键词: capturing CO2     lithium silicate     lithium aluminate     magnesium aluminate    

Mature

Giorgia De Guido, Matteo Compagnoni, Laura A. Pellegrini, Ilenia Rossetti

《化学科学与工程前沿(英文)》 2018年 第12卷 第2期   页码 315-325 doi: 10.1007/s11705-017-1698-z

摘要: Carbon capture and storage (CCS) have acquired an increasing importance in the debate on global warming as a mean to decrease the environmental impact of energy conversion technologies, by capturing the CO produced from the use of fossil fuels in electricity generation and industrial processes. In this respect, post-combustion systems have received great attention as a possible near-term CO capture technology that can be retrofitted to existing power plants. This capture technology is, however, energy-intensive and results in large equipment sizes because of the large volumes of the flue gas to be treated. To cope with the demerits of other CCS technologies, the chemical looping combustion (CLC) process has been recently considered as a solution for CO separation. It is typically referred to as a technology without energy penalty. Indeed, in CLC the fuel and the combustion air are never mixed and the gases from the oxidation of the fuel (i.e., CO and H O) leave the system as a separate stream and can be separated by condensation of H O without any loss of energy. The key issue for the CLC process is to find a suitable oxygen carrier, which provides the fuel with the activated oxygen needed for combustion. The aim of this work is to explore the feasibility of using perovskites as oxygen carriers in CLC and to consider the possible advantages with respect to the scrubbing process with amines, a mature post-combustion technology for CO separation.

关键词: CO2 capture     monoethanolamine     chemical looping combustion     oxygen carrier     perovskites    

富氧燃烧技术兼容性设计理念的基础研究与技术挑战 Article

郑楚光, 柳朝晖, 向军, 张立麒, 张世红, 罗聪, 赵永椿

《工程(英文)》 2015年 第1卷 第1期   页码 139-149 doi: 10.15302/J-ENG-2015008

摘要:

富氧燃烧技术是一项颇具潜力的燃煤电站大规模CO2减排的CO2捕集与存储(CCS)新技术。以华中科技大学等为代表的中国若干高校和企业已经在该技术从0.4 MWth到35 MWth规模的试验平台上取得了较大进展,200 MWth商业化示范工程的可行性研究也已顺利完成。中国富氧燃烧技术的研发示范进展已经被纳入全球富氧燃烧技术路线图的重要进程。空气燃烧/富氧燃烧的兼容性设计是示范路线图的重要部分,针对富氧燃烧技术的一些挑战,本文简明阐述了该技术的基础研究与技术创新,包含稳燃、传热、系统运行、矿物演变、腐蚀特性等研究;为了进一步降低碳捕集的成本以及部署大规模应用,本文也简述了下一代新型富氧燃烧技术,包括新型制氧技术和无焰富氧燃烧技术。

关键词: 富氧燃烧     研发与示范     CO2捕集    

Reduction potential of the energy penalty for CO capture in CCS

《能源前沿(英文)》 2023年 第17卷 第3期   页码 390-399 doi: 10.1007/s11708-023-0864-x

摘要: CO2 capture and storage (CCS) has been acknowledged as an essential part of a portfolio of technologies that are required to achieve cost-effective long-term CO2 mitigation. However, the development progress of CCS technologies is far behind the targets set by roadmaps, and engineering practices do not lead to commercial deployment. One of the crucial reasons for this delay lies in the unaffordable penalty caused by CO2 capture, even though the technology has been commonly recognized as achievable. From the aspects of separation and capture technology innovation, the potential and promising direction for solving this problem were analyzed, and correspondingly, the possible path for deployment of CCS in China was discussed. Under the carbon neutral target recently proposed by the Chinese government, the role of CCS and the key milestones for deployment were indicated.

关键词: CO2 capture and storage (CCS)     CO2 separation     energy penalty    

Efficacy and safety of JAK inhibitor INC424 in patients with primary and post-polycythemia vera or post-essential

null

《医学前沿(英文)》 2016年 第10卷 第4期   页码 437-443 doi: 10.1007/s11684-016-0472-9

摘要:

A phase II study (A2202) was performed to evaluate the efficacy and safety of JAK inhibitor ruxolitinib in 63 Chinese MF patients. Ruxolitinib was given twice a day (bid) at a starting dose of 15 mg (n=25) or 20 mg (n=38) based on a baseline platelet count. About 94.7% of the patients achieved a reduction in spleen size, 27.0% of which exhibited significant reduction (≥35%) at week 24. Significant improvement in debilitating constitutional symptoms, as assessed by MFSAF v2.0, was observed in patients treated with ruxolitinib. Ruxolitinib treatment was generally well tolerated by Chinese patients. Although the treatment was associated with an increase in certain adverse events (AEs) that were established as identified risks (anemia and thrombocytopenia), these AEs were considered manageable in this clinical setting. Ruxolitinib provided substantial reductions in splenomegaly and improvements in symptoms, and was well-tolerated by Chinese patients with MF.

关键词: JAK     ruxolitinib     Chinese patients     myelofibrosis    

Adiponectin: mechanisms and new therapeutic approaches for restoring diabetic heart sensitivity to ischemic post-conditioning

null

《医学前沿(英文)》 2013年 第7卷 第3期   页码 301-305 doi: 10.1007/s11684-013-0283-1

摘要:

Systemic inflammatory response following myocardial ischemia-reperfusion injury (IRI) to a specific organ may cause injuries. Ischemic post-conditioning (IPostC) has emerged as a promising method for myocardial protection against IRI both in experimental and in clinical settings. Enhancement of endogenous nitric oxide (NO) is one of the major mechanisms by which IPostC confers cardioprotection. However, the sensitivity of the diabetic heart to IPostC is impaired and the underlying mechanism is unknown. Adiponectin (APN) is an adipocyte-derived plasma protein with anti-diabetic and anti-inflammatory properties. Plasma levels of APN are decreased in obese subjects and in patients with type 2 diabetes. APN supplementation has been shown to increase NO production and attenuate myocardial IRI in normal (non-diabetic) animals. However, the effect of APN on myocardial injury in diabetic subjects, especially its potential in restoring the sensitivity of the diabetic heart to IPostC has not been investigated. In the current paper, we discussed the possible reasons why the myocardium of diabetic subjects loses sensitivity to IPostC and also highlighted the potential effectiveness and mechanism of APN in restoring IPostC cardioprotection in diabetes. This review proposes to conduct studies that may facilitate the development of novel and optimal therapies to enhance cardioprotection in patients with severe diseases such as diabetes.

关键词: adiponectin     ischemic post-conditioning     ischemia reperfusion injury     diabetes    

标题 作者 时间 类型 操作

Dynamic modelling and simulation of a post-combustion CO capture process for coal-fired power plants

期刊论文

Application of membrane separation technology in post-combustion carbon dioxide capture process

Mo LI,Xiaobin JIANG,Gaohong HE

期刊论文

Integrated adsorption and absorption process for post-combustion CO

Gongkui Xiao, Penny Xiao, Andrew Hoadley, Paul Webley

期刊论文

聚乙烯胺促进传递膜用于燃烧后二氧化碳捕集——从材料到工艺的挑战和前景

何雪忠

期刊论文

年15万吨规模燃煤电厂燃烧后二氧化碳捕集示范工程

崔青汝, 赵瑞, 王天堃, 张帅, 黄艳, 顾永正, 徐冬

期刊论文

碳配额市场下以乙醇胺溶液进行碳捕集的电厂的优化竞标和运行:基于强化学习的Sarsa时间差分算法的解决

李子昂, 王美宏, 丁正桃

期刊论文

Techno-economic comparison of three technologies for pre-combustion CO

Simon Roussanaly, Monika Vitvarova, Rahul Anantharaman, David Berstad, Brede Hagen, Jana Jakobsen, Vaclav Novotny, Geir Skaugen

期刊论文

Reaction mechanism of arsenic capture by a calcium-based sorbent during the combustion of arsenic-contaminated

Mei Lei, Ziping Dong, Ying Jiang, Philip Longhurst, Xiaoming Wan, Guangdong Zhou

期刊论文

The capture of carbon dioxide by transition metal aluminates, calcium aluminate, calcium zirconate, calcium

Ganesh TILEKAR, Kiran SHINDE, Kishor KALE, Reshma RASKAR, Abaji GAIKWAD

期刊论文

Capture of carbon dioxide over porous solid adsorbents lithium silicate, lithium aluminate and magnesiumaluminate at pre-combustion temperatures

P. V. Korake, A. G. Gaikwad

期刊论文

Mature

Giorgia De Guido, Matteo Compagnoni, Laura A. Pellegrini, Ilenia Rossetti

期刊论文

富氧燃烧技术兼容性设计理念的基础研究与技术挑战

郑楚光, 柳朝晖, 向军, 张立麒, 张世红, 罗聪, 赵永椿

期刊论文

Reduction potential of the energy penalty for CO capture in CCS

期刊论文

Efficacy and safety of JAK inhibitor INC424 in patients with primary and post-polycythemia vera or post-essential

null

期刊论文

Adiponectin: mechanisms and new therapeutic approaches for restoring diabetic heart sensitivity to ischemic post-conditioning

null

期刊论文