International Journal of Greenhouse Gas Control最新文献

{"title":"Water-alternating-gas injections for optimized mineral carbon storage in basalt","authors":"Claire J. Nelson ,&nbsp;David S. Goldberg ,&nbsp;Mark D. White","doi":"10.1016/j.ijggc.2024.104283","DOIUrl":"10.1016/j.ijggc.2024.104283","url":null,"abstract":"<div><div>Mineral carbon storage in basalt has been proven as an effective means of durable and verifiable geologic carbon sequestration. This study investigates a novel technology aimed at optimizing subsurface mineralization: water-alternating-gas (WAG), or cycled injections of free-phase CO₂ (e.g., supercritical) and water. Incorporating injection of supercritical CO₂ (scCO₂) into basalt can minimize water demand, increase per-well injection capacity, and expand the feasible range of basalt carbon storage. Cycling water between injection of scCO₂ can accelerate geochemical reactions and shorten mineralization timeframes. We model aqueous-phase, scCO₂-only, and WAG injections into subsea and onshore basalt sites using the STOMP-CO<strong>₂</strong> simulator. We first simulate WAG injection into mid-ocean ridge basalt at the Juan de Fuca plate in the Northeast Pacific Ocean to investigate injection parameters and reservoir characteristics that accelerate mineralization during WAG injections. Results indicate that WAG injections can be optimized to mineralize 100 % of a 1 Mt CO₂ injection within 40 years. Optimized WAG injections can double mineralization compared to traditional scCO₂-only using half as much water as an aqueous-phase approach. We then compare the efficiency of WAG injections by simulating scenarios at two additional sites: offshore basalt in the Louisville Seamount, a subocean volcano in the Southwest Pacific, and continental flood basalt along the Columbia River in Washington State. We observe faster mineralization at the Louisville seamount than the Juan de Fuca site, likely due to variations in injection-zone mineralogy. At the Columbia River site, WAG scenarios improve mineralization the most relative to the scCO₂-only injection and increase feasible per-well injection rates relative to aqueous-phase approaches. Our results indicate that WAG has the potential to optimize carbon mineralization in basalt and substantially advance the scalability of this technology.</div></div>","PeriodicalId":334,"journal":{"name":"International Journal of Greenhouse Gas Control","volume":"141 ","pages":"Article 104283"},"PeriodicalIF":4.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143095161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of fracture network efficiency to CO2 storage with a DFN approach","authors":"Valentina Romano ,&nbsp;Giampaolo Proietti ,&nbsp;Rajesh J. Pawar ,&nbsp;Sabina Bigi","doi":"10.1016/j.ijggc.2025.104317","DOIUrl":"10.1016/j.ijggc.2025.104317","url":null,"abstract":"<div><div>Modeling the behavior of fluids within a fractured rock volume is a fundamental step in the geo-resource exploration and other areas of geosciences. In this work we adopt a Discrete Fracture Network (DFN) approach to quantify the efficiency of fractured systems to fluid flow, simulating the supercritical CO₂ migration and storage in DFN models, and quantifying the mass distribution of the fluid in the system. DFNs are generated using a range of fracture densities commonly ​​found in the field and available in literature. We generate a series of synthetic DFNs that vary in terms of number of fractures, as well as permeability and porosity as a function of fracture intensity. We perform fluid flow simulations on selected synthetic DFNs for each fracture intensity, obtaining the amount of CO₂ finally stored in the system. Considering these results we define a Fracture Efficiency Factor (<em>Efr</em>), as the amount of stored CO₂ exclusively in the fracture networks against the total CO₂ introduced in the system and relate it to the DFN fracture intensity. This method can be applied to refine CO₂ storage capacity estimates, allowing to include the explicit contribution of fracture networks to the CO₂ storage.</div></div>","PeriodicalId":334,"journal":{"name":"International Journal of Greenhouse Gas Control","volume":"141 ","pages":"Article 104317"},"PeriodicalIF":4.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143095759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of technologies and economics for carbon dioxide removal from a portfolio perspective","authors":"Andreas Mühlbauer ,&nbsp;Dominik Keiner ,&nbsp;Christoph Gerhards ,&nbsp;Upeksha Caldera ,&nbsp;Michael Sterner ,&nbsp;Christian Breyer","doi":"10.1016/j.ijggc.2024.104297","DOIUrl":"10.1016/j.ijggc.2024.104297","url":null,"abstract":"<div><div>Carbon dioxide removal (CDR) is essential to achieve ambitious climate goals limiting global warming to less than 1.5°C, and likely for achieving the 1.5°C target. This study addresses the need for diverse CDR portfolios and introduces the LUT-CDR tool, which assesses CDR technology portfolios aligned with hypothetical societal preferences. Six scenarios are described, considering global deployment limitations, techno-economic factors, area requirements, technology readiness, and storage security for various CDR options. The results suggest the feasibility of large-scale CDR, potentially removing 500–1750 GtCO₂ by 2100 to meet the set climate targets. For a 1.0°C climate goal, CDR portfolios necessitate 12.0–37.5% more primary energy compared to a scenario without CDR. Remarkably, funding a 1.0°C target requires only 0.42–0.65% of the projected global gross domestic product. Bioenergy carbon capture and sequestration and rainfall-based afforestation play limited roles, while secure sequestration of captured CO₂ via direct air capture, electricity-based carbon sequestration, and desalination-based afforestation emerge as more promising options. The study offers crucial techno-economic parameters for implementing CDR options in future energy-industry-CDR system analyses and demonstrates the tool's flexibility through alternative assumptions. It also discusses limitations, sensitivities, potential trade-offs, and outlines options for future research in the area of large-scale CDR.</div></div>","PeriodicalId":334,"journal":{"name":"International Journal of Greenhouse Gas Control","volume":"141 ","pages":"Article 104297"},"PeriodicalIF":4.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143095763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Informing field-scale CO2storage simulations with sandbox experiments: The effect of small-scale heterogeneities","authors":"Jose Eduardo Ubillus ,&nbsp;Sahar Bakhshian ,&nbsp;Hailun Ni ,&nbsp;David DiCarlo ,&nbsp;Tip Meckel","doi":"10.1016/j.ijggc.2025.104318","DOIUrl":"10.1016/j.ijggc.2025.104318","url":null,"abstract":"<div><div>Small-scale heterogeneities can significantly affect the fate of the <span><math><mrow><mi>C</mi><msub><mrow><mi>O</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math></span> plume and trapping during CO<span><math><mrow><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub><mspace></mspace></mrow></math></span>migration. We conducted geologic carbon storage field-scale simulations to investigate the impact of small-scale heterogeneities on plume dynamics and trapping performance. Small-scale heterogeneities have been shown to increase the amount of trapped CO<span><math><mrow><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub><mspace></mspace></mrow></math></span>during buoyancy-driven flow. The trapped <span><math><mrow><mi>C</mi><msub><mrow><mi>O</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math></span> saturation is validated by previous sandbox experimental work during buoyancy-driven flow in realistic heterogeneous domains and is implemented through the critical CO<span><math><mrow><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub><mspace></mspace></mrow></math></span>saturation parameter (i.e., the first non-zero value in the drainage CO<span><math><mrow><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub><mspace></mspace></mrow></math></span>relative permeability curve). Depending on the type and degree of heterogeneity, various critical CO<span><math><mrow><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub><mspace></mspace></mrow></math></span>saturation values are exhibited. Furthermore, we investigated the effect of small-scale heterogeneties when multiple capillary pressure models are employed. This study demonstrates that an increase in critical CO<span><math><mrow><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub><mspace></mspace></mrow></math></span>saturation reduces the CO<span><math><mrow><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub><mspace></mspace></mrow></math></span>plume size and lateral extent, accompanying an increase in residual trapping and a decrease in solubility trapping. Finally, we show that independent of the capillary pressure model used, an increase in critical saturation leads to similar CO<span><math><mrow><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub><mspace></mspace></mrow></math></span>plume dynamics distribution and trapping performance. These results emphasize the importance of quantifying the effect of small-scale heterogeneity as they affect the large-scale behavior of the CO<span><math><mrow><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub><mspace></mspace></mrow></math></span>plume.</div></div>","PeriodicalId":334,"journal":{"name":"International Journal of Greenhouse Gas Control","volume":"141 ","pages":"Article 104318"},"PeriodicalIF":4.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143095890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The cost of impurities: A techno-economic assessment on conditioning of captured CO2 to commercial specifications","authors":"Ebbe Hauge Jensen ,&nbsp;Rikke Cilius Pedersen ,&nbsp;Isaac Appelquist Løge ,&nbsp;Gcinisizwe Msimisi Dlamini ,&nbsp;Randi Neerup ,&nbsp;Christian Riber ,&nbsp;Brian Elmegaard ,&nbsp;Jonas Kjær Jensen ,&nbsp;Philip Loldrup Fosbøl","doi":"10.1016/j.ijggc.2025.104309","DOIUrl":"10.1016/j.ijggc.2025.104309","url":null,"abstract":"<div><div>CO₂ capture, utilization, and storage is a key technology to mitigate the climate crisis, and the development of a CO₂ infrastructure is critical for its future large-scale implementation. Successful deployment of a CO₂ infrastructure depends largely on the compatibility between industry links, which is currently limited by unaligned CO₂ purity specifications. Therefore, there is a need to understand the economic and technical implications of purity specifications throughout the whole value chain. This work presents, a highly detailed study encompassing the entire CO₂ conditioning system, including compression, dehydration, liquefaction, and purification. A single, common CO₂ conditioning system derived from operational facilities and designed for post-combustion CO₂ feeds was applied for conditioning of four different feed gases. The investigation includes a techno-economic analysis considering capital and operational expenses for twelve different combinations of CO₂ feed streams and outlet product specifications. The feed sources represent a range of CO₂ purities from high purity to low purity and were derived from post-combustion, pre-combustion, and oxy-fuel combustion processes, while the considered product specifications include CO₂ storage in depleted gas fields, saline aquifer, and utilization in the food industr. For the investigated systems, it is found that low-purity CO₂ was the most expensive source gas to condition to commercial specifications due to a high content of non-condensable gases. The levelized costs for CO₂ conditioning amounted to approximately 25 EUR/t CO₂, 27 EUR/t CO₂, 34 EUR/t CO₂, and 46 EUR/t CO₂ for the investigated high purity, medium-high purity, medium-low purity, and low purity CO₂ cases, respectively. In the investigated cases, only the specifications of low-volatile species were relevant. The impurity limit specifications were relatively close across the investigated commercial specifications, therefore, these did not show significant cost differences. The study clarifies the economic impact on the CO₂ conditioning process from imposing equivalent purity constraints on CO₂ from different sources.</div></div>","PeriodicalId":334,"journal":{"name":"International Journal of Greenhouse Gas Control","volume":"141 ","pages":"Article 104309"},"PeriodicalIF":4.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143095745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Constraining O isotope equilibrium exchange between CO2 and water during fluid cycling in a closed system","authors":"Sascha Serno ,&nbsp;Gareth Johnson ,&nbsp;Adrian J. Boyce ,&nbsp;Stuart M.V. Gilfillan","doi":"10.1016/j.ijggc.2025.104314","DOIUrl":"10.1016/j.ijggc.2025.104314","url":null,"abstract":"<div><div>Residual trapping is a critical component of secure geological CO₂ storage. Quantification of the amount of CO₂ residually trapped plays a key role in predicting CO₂ plume migration, immobilisation and storage security. However, it is difficult to determine pore-space saturation of CO₂ within a subsurface reservoir. δ¹⁸O of CO₂ and reservoir fluids from a variety of field-scale CO₂ injection settings have provided estimates of in-situ CO₂ reservoir saturations. This is due to O isotope exchange between CO₂ and H₂O and subsequent changes in δ¹⁸O_H2O values due to the presence of free phase CO₂. Here, we present results from laboratory experiments to measure the O isotope equilibration time at ambient conditions and O isotope behaviour in both CO₂ and water during fluid cycling in a closed system. This provides an analogue of O isotopic exchange within a single-well push-pull injection and production scenario and is primarily motivated to help understand varying estimates of the amount of residual trapping obtained from O isotope measurements during the Otway 2Bext single well push-pull test. We find that full O isotope equilibration between CO₂ and water is established after 72 hours and water δ¹⁸O does not change after 48 hours. The maximum change in δ¹⁸O of water of 1.16 % during the back-production phase of our fluid cycling experiment using waters enriched in δ¹⁸O would be negligible in field-scale projects, when unenriched water and CO₂ sources are used, considering standard analytical uncertainties. However, our results show that changes in δ¹⁸O values of CO₂ during a back-production scenario may be larger than 3.52 %, hence it may be inaccurate to solely use O isotope composition of CO₂ to quantify CO₂ pore-space saturation in a single-well push-pull configuration.</div></div>","PeriodicalId":334,"journal":{"name":"International Journal of Greenhouse Gas Control","volume":"141 ","pages":"Article 104314"},"PeriodicalIF":4.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143095756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of CO2 geological sequestration potential in the Northern Jiangsu-Southern yellow Sea Basin via AHP-CRITIC methodology","authors":"Wenxin Xiang ,&nbsp;Shuxun Sang ,&nbsp;Sijie Han ,&nbsp;Shiqi Liu ,&nbsp;Xiaozhi Zhou ,&nbsp;Dexi Wang","doi":"10.1016/j.ijggc.2025.104321","DOIUrl":"10.1016/j.ijggc.2025.104321","url":null,"abstract":"<div><div>As a responsible major country, China is leading the world in carbon emissions while actively promoting carbon reduction and emission reduction efforts. CO₂ geological sequestration is one of the key direct emission reduction technologies. The North Jiangsu-South Yellow Sea Basin, a significant sedimentary basin in eastern China, holds substantial potential for CO₂ geological sequestration. The suitability assessment of CO₂ geological sequestration is the basis for the deployment of CO₂ sequestration projects, and the key is how to scientifically and effectively select the deployment sites. This study focuses on the Subei-South Yellow Sea Basin, constructing an index system consisting of 3 criterion levels and 14 indicator levels. The AHP-Critic combined method was used for indicator weighting, and a multi-level fuzzy comprehensive evaluation method was applied to assess the CO₂ geological sequestration suitability of 13 depression units in the basin. Haian and Qintong Depressions were identified as suitable regions for CO₂ geological sequestration in the North Jiangsu-South Yellow Sea Basin, with Baiju, Yancheng, and Gaoyou Depressions categorized as secondary suitable areas. The assessment results offer scientific support for site selection and engineering of CO₂ geological sequestration in the North Jiangsu-South Yellow Sea Basin.</div></div>","PeriodicalId":334,"journal":{"name":"International Journal of Greenhouse Gas Control","volume":"142 ","pages":"Article 104321"},"PeriodicalIF":4.6,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143165007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modeling approaches for addressing enigmatic migration patterns for aqueous- and nonaqueous-soluble tracers in an enhanced oil recovery field","authors":"Mark White ,&nbsp;Alex Rinehart ,&nbsp;Peter Rose ,&nbsp;Michael Mella ,&nbsp;Richard Esser ,&nbsp;William Ampomah","doi":"10.1016/j.ijggc.2024.104295","DOIUrl":"10.1016/j.ijggc.2024.104295","url":null,"abstract":"<div><div>A series of six aqueous-soluble and four nonaqueous-soluble tracer experiments and corresponding numerical simulations were executed for the Farnsworth Field in Ochiltree County, Texas, USA, a field which is undergoing tertiary enhanced oil recovery with water-alternating-gas (WAG) production. The combination of field experiments and numerical simulations was designed to identify flow pathways between injectors and producers and potential short circuiting of injected fluids. Field recoveries of aqueous-soluble tracers were dependent on the WAG stages of the tracer injection well, with shorter arrival times for strictly waterflooding and delayed arrival times for alternating injection stages. Aqueous-soluble tracer (i.e., 1,3,6-naphthalene trisulfonate, 1,5-naphthalene disulfonate, 1,6-naphthalene disulfonate, 2-naphthalene sulfonate, 2,6-naphthalene disulfonate, and 2,7-naphthalene disulfonate) arrivals for WAG injectors indicated water bypass was occurring during gas injection stages. Nonaqueous-soluble tracer (i.e., perfluoro-1,2-dimethylcyclohexane, perfluoroethylcyclohexane, perfluoromethylcyclohexane, and perfluoromethylcyclopentane) experiments revealed faster migration velocities than for the aqueous-soluble tracers and flow heterogeneities that resulted in the tracers bypassing nearer production wells. Base-case numerical simulations of the tracer experiments used a geologic model of the Morrow B sandstone production interval with parameters calibrated from history matching simulations, with the Morrow B sandstone sub-divided into hydrologic flow units (HFUs). Alternative simulation scenarios investigated HFU-dependent three-phase relative permeability models and dynamic intrinsic permeability enhancement with exposure to aqueous-dissolved CO₂. Compositional petroleum models with four components were shown to be sufficient for tracer modeling compared against a nine-component model, with a factor of four difference in simulation execution time. HFU-dependent relative permeability models and dynamic intrinsic permeability modifications influenced arrival times and production concentrations of both aqueous- and nonaqueous-soluble tracers but did not yield unique flow pathways compared to those observed in the base-case scenario.</div></div>","PeriodicalId":334,"journal":{"name":"International Journal of Greenhouse Gas Control","volume":"140 ","pages":"Article 104295"},"PeriodicalIF":4.6,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143157910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Can section 45Q tax credit foster decarbonization? A case study of geologic carbon storage at Acid Gas Injection wells in the Permian Basin","authors":"Shruti K. Mishra ,&nbsp;Miles A. Henderson ,&nbsp;David Jiawei Tu ,&nbsp;Alexander Erwin ,&nbsp;Robert C. Trentham ,&nbsp;Dietrich H. Earnhart ,&nbsp;Jean-Lucien Fonquergne ,&nbsp;Hannah Gagarin ,&nbsp;Jason E Heath","doi":"10.1016/j.ijggc.2024.104284","DOIUrl":"10.1016/j.ijggc.2024.104284","url":null,"abstract":"<div><div>Carbon capture, utilization, and storage (CCUS) is an important pathway for meeting climate mitigation goals. While the economic viability of CCUS is well understood, previous studies do not evaluate the economic feasibility of carbon capture and storage (CCS) in the Permian Basin specifically regarding the new Section 45Q tax credits. We developed a technoeconomic analysis method, evaluated the economic feasibility of CCS at the acid gas injection (AGI) wells, and assessed the implication of Section 45Q tax credits for CCS at the AGIs. We find that the compressors, well depth, and the permit and monitoring costs drive the facility costs. Compressors are the predominant contributors to capital and operating expenditure driving the levelized cost of CO₂ storage. Strategic cost reduction measures identified include 1) sourcing of low-cost electricity and 2) optimizing operational efficiency in well operations. In evaluating the impact of the tax credits on CCS projects, facility scale proved decisive. We found that facilities with an annual injection rate exceeding 10,000 MT storage capacity demonstrate economic viability contingent upon the procurement of inputs at the least cost. The new construction of AGI wells were found to be economically viable at a storage capacity of 100,000 MT. The basin is heavily focused on CCUS (tax credit – $65/MT CO₂), which overshadows CCS ($85/MT CO₂) opportunities. Balancing the dual objectives of CCS and CCUS requires planning and coordination for optimal resource and pore space utilization to attain the basin's decarbonization potential. We also found that CCS on AGI is a lower cost CCS option as compared to CCS on other industries.</div></div>","PeriodicalId":334,"journal":{"name":"International Journal of Greenhouse Gas Control","volume":"140 ","pages":"Article 104284"},"PeriodicalIF":4.6,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142746281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mathematical modeling and economic optimization of a piperazine-based post-combustion carbon capture process","authors":"Ilayda Akkor ,&nbsp;Shachit S. Iyer ,&nbsp;John Dowdle ,&nbsp;Le Wang ,&nbsp;Chrysanthos E. Gounaris","doi":"10.1016/j.ijggc.2024.104282","DOIUrl":"10.1016/j.ijggc.2024.104282","url":null,"abstract":"<div><div>Given the urgent need to mitigate increasing CO<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> emissions and alleviate the climate crisis, amine-based post-combustion capture (PCC) processes have emerged as a prominent method to reduce the emissions from industrial point sources. While many technological advancements have been introduced for such processes, leading to decreased energy requirements for capture, there are still only a few commercial installations because of their high costs. Therefore, these processes can benefit from process optimization to enhance their economic viability. This work presents a new open-source, rate-based, equation-oriented model of a novel PCC process that uses piperazine as the amine solvent. The model was implemented in Python, in accordance with the Pyomo-based <em>IDAES</em> modeling and optimization framework. The proposed nonlinear model can be used for both simulation and optimization. To ensure its robust convergence, we further devise a rigorous, multi-level cascade initialization scheme, whose principles can further be applied towards the initialization of similar process models. The model was validated with published pilot plant data and then optimized for pilot and commercial scales with an economic objective that considers both capital and operational costs. Results show that process optimization can indeed improve the economics of this technology, leading to 15.6% yearly savings at the pilot scale compared to the baseline case considered in the study. Additional parametric analyses were performed to understand how the flue gas flowrate and CO<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> concentration, as well as the target capture rate, affects the cost of capture.</div></div>","PeriodicalId":334,"journal":{"name":"International Journal of Greenhouse Gas Control","volume":"140 ","pages":"Article 104282"},"PeriodicalIF":4.6,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142746280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}