A controllability analysis of a pilot‐scale CO₂ capture plant using ionic liquids

Abstract

Nowadays there is a world concern on the impact and effect of large CO2 atmospheric concentrations on human health. Fossil‐fuel combustion processes in power plants are among the major contributors to this issue. Hence, it becomes important to develop new clean and sustainable processes aimed to reduce the amount of CO2 released to atmosphere by combustion processes in power plants. One of the best feasible manners to achieve this purposes lies in the use of a closed‐loop control system able to keep the amount of green‐house gases under specification even in the presence of unexpected scenarios. Of course, CO2 capture has been extensively researched in the past. However, in this regard the industrial practice has consisted in using Amines leading to sustainability and safety issues. Hence, it makes sense to seek for new and potentially environmental friendly process design to address CO2 reduction from power plants but applying a new type of sustainable stripping solvents. In this work we address the sustainable CO2 reduction issue from a process control point of view applying a previous design proposed by our research team based on the deployment of Ionic Liquids (IL) as potential green solvents and developing an efficient and decentralized multiloop control system. We demonstrate that the closed‐loop system is able to maintain the CO2 concentration levels under specification by testing in presence of several demanding scenarios. Overall, from an economic, sustainable and control point of view it looks feasible to replace the traditional amines‐based CO2 capture process by other alternatives based on the application of IL as potential green solvents. © 2016 American Institute of Chemical Engineers AIChE J, 62: 3298–3309, 2016

Ionic-Liquid-Based CO2 Capture Systems: Structure, Interaction and Process

“…Further, they made a controllability analysis on a postcombustion CO 2 capture plant using ILs as solvent, and thought that from an economic, sustainable, and control point of view, it looks feasible to replace the aminebased CO 2 capture process by other alternatives based on the application of ILs as solvents. 460 Garci ́a-Gutieŕrez et al 461 carried out the technical-economic assessment of CO 2 capture for biogas upgrading using [Emm][Tf 2 N], [Hmim][Tf 2 N], and [P 66614 ][Tf 2 N]. The evaluated processes were compared in terms of energy efficiency, capital investment, and biomethane production costs.…”

Multiscale Velocity Unified Theory To Characterize Microscale Structure of Electrodes and Transfer Mechanism in CO2 Capture

“…The velocity triangle relationship based on the mass transfer coefficient, heat transfer coefficient, and fluid flow velocity provides an additional constraint condition for the mass transfer equation, heat transfer equation, and momentum equation. For example, for the CFD simulation of CO 2 absorption in the reactor, ,, the CFD simulation time was reduced by 30% by applying the multiscale velocity unified theory (Figure ). For a complex system such as astronautics and deep ocean, the multiscale velocity unified theory is expected to simplify the CFD simulation in the future.…”

Recent advances on first-principles modeling for the design of materials in CO2 capture technologies

“…Compared with experimental reports, DFT analysis is an efficient and inexpensive approach that can be employed to screen a large number of potential ILs to build up specific structure-property relationships. ILs are popular in the area of CO 2 capture due to its experimentally reported high CO 2 capture capacities and its desirable chemical or physical properties [34], [138], [139].…”