Papers by Keyword: CCS

Abstract: Carbon dioxide (CO₂) storage serves as a greenhouse gas mitigation strategy employed by numerous nations. This study aims to explore the feasibility of CO₂ storage in the Rio del Rey Basin, Gulf of Guinea region. We employ a compositional flow model, which has been validated using data from a Subsurface interpretation project in Cameroon.This work is aimed at conducting compositional numerical simulations to investigate the impact of geochemistry on CO₂ aquifer storage. A conceptual development CO₂ storage study has been considered for a deep aquifer reservoir formation Miocene Rio del Rey Basin, Cameroon Gulf of Guinea. The reservoir formations in this basin are set to have very good petrophysical and geological properties for it to be considered as a storage system.The aquifer formation contains various amounts of minerals which in turn would alter the injection of CO₂ as the chemical and geological properties of the storage system change. Some of the chemicals would alter the CO₂ fluid and rock properties and consequently the reservoir injection and storage rates and quantities of injected and stored CO₂ due to minerals precipitation and vaporization phenomena within the storage system. This presents a major concern as the impact of geochemistry on CO₂ injection and storage is not well understood to date which means that the development and operational strategies and costs of such a project are not fully understood and present significant deployment risk and uncertainties.The simulation results show that aquifer geochemistry strongly affects CO₂ brine water storage efficiency at different scales.

Abstract: This paper focuses on the carbonation of non-hydraulic binders based primarily on wollastonite (CaSiO₃) in order to study the relationship between clinker composition, curing conditions and compaction on carbonation reaction rate. Decoupled carbonation and drying experiments are carried out using cements at different CaO/SiO₂ ratio, at 60 °C, 1 bar of CO₂ and multiple RH (relative humidity) and compaction degrees. Solid analysis include mass gain or loss, TGA, XRF and Carbon/Hydrogen (CH) to determine respectively the bound H₂O content, CO₂ content and the mineralogical assemblage. Relative humidity strongly influences carbonation intrinsic reaction rate, while compaction seems to be a second order mechanism. Testing procedure can be used to discriminate the reactivity of clinkers with various initial phase assemblage.

Abstract: In pervasive computing environments, a single service is often unable to meet the complex needs of users. A composite service is a combination of services to provide value-added services that a single service cannot achieve. Thus, it is important to ensure that services protocol are compatible. This paper provides a formal description of service protocol, a new definition of services protocol compatibility and a algorithm for automatic generation adapter for incompatible services protocol.

Abstract: The paper is closely related to the challenge of the most important greenhouse gas - carbon dioxide. Both, the effective capture and secure storage of CO₂, is an urgent environmental problem. Approximately ¾ of all anthropogenic emissions of CO₂ are related to the use of fossil fuels. Great attention is given to the absorption processes for the capture of the gas. Carbon Capture and Storage (CCS) is a promising solution for achieving a significant reduction in CO₂- emissions. Capture of combustion gases using standard volatile organic solvents are the source of numerous problems like environmental pollution, instability and corrosivity of such solvents. An effective solution seems to be the use of ionic liquids. Ionic liquids are a relatively new class of compounds, which are chemically and thermally stable and are able to dissolve a wide range of substances. The negligible volatility of ionic liquids is their most important property. Research and development of the CO₂- capture technology has not yet reached the stage of commercial exploitation under economically acceptable conditions. The aim of this article is to show the possibilities of use of ionic liquids in the absorption separation processes for CO₂ -capture.

Abstract: In order to resolve the modelling problem of business processes collaboration, especially, the asynchronous communication mechanism problem and the verification problem, combining the respective strengths of Petri Nets and the classical process algebra CCS, a modeling method is proposed in this paper. First of all, modelling the internal view of cross-organization based on Petri Nets, extracting the communication interface and mapping to internal transition to get the public view; Secondly, researching on the asynchronous communication mechanism and modelling the communication process by CCS to get communication behavior view, thus making the verification of collaboration converts to the CCS derivation; Finally, an algorithm is proposed to generate automatically the behaviors possessed by every transition in model view. The modelling method proposed is not only to analyze and verify the structure properties in collaboration, but also to analyze and verify the behavior properties, which brings a huge convenience for further analysis and verification in cross-organizational business process collaboration.

Abstract: Nowadays, lots of college campus portal systems have many problems, such as teachers and students do not want to use the systems. This paper, which analyzes the advantages and disadvantages of two kinds of portal systems, and it also insight the demands of teachers and students, is in order to construct a portal system which applies to the private colleges with combining the Portal system and the CCS system. Hoping the portal system’s construction plan can have a certain reference value for the other universities and colleges who are going to construct campus portal system.

Abstract: The super capacitor can effectively prolong the operation of the energy storage system, improve its economic performance and power output capacity. But the design of the super capacitor is not perfect, the design method is also very troublesome.In this paper, through studying the different implementations of Matlab - DSP integrated design methods,I tried to find the optimal method to achieve the most simple and rapid Matlab - DSP integrated design. Build models in the Simulink, complete the design of the model, and convert it to DSP assembly language and download to the target board. The main process of this method is that the above steps. Apply this method in the design of the super capacitor , we can greatly speed up the development speed.

Abstract: Carbon dioxide is claimed to be responsible for 60 percent of the global warming caused by greenhouse gases. CCS is important for reducing CO₂ emissions. Most technologies are in demonstration stage. Carbon capture accounts for two thirds of total cost of CCS. The trend of CCS is also described.

Abstract: The rapid increase in the concentration of CO₂ raises global concern. The latest research indicates that the concentration has reached a new peak of 400^[1] ppm. Effective CO₂ abatement strategies, such as Carbon Capture and Storage (CCS), are of great interest. One common method of CCS is MEA absorption. This paper aims to illustrate post-combustion capture with MEA solvent. The principles, procedures, influencing factors, advantages and drawbacks are discussed to better understand what hinders existing power plants from retrofitting with this technology.

Abstract: Carbon Capture and Storage (CCS) is one of the global leading methods that could potentially retard the speed of climate change. However, CCS on point sources can only slowdown the rate of increase of atmospheric CO2 concentration. In order to mitigate CO2 released by previous emissions, a more proactive alternative is proposed where CO2 is directly extracted and captured from air Direct Air Capture (DAC). This paper presents a technical overview from our current research of a novel DAC concept which features a phase of axial compression to adapt pre-capture atmospheric air to a level suitable for carbon capture. Also detailed in the paper is the feasibility study addressing several key issues: the energy consumption and overall capturing efficiency of the proposed DAC system.