Reduction of energy requirement of CO2 desorption from a rich CO2-loaded MEA solution by using solid acid catalysts

Zhang, Xiaowen; Zhang, Xin; Liu, Helei; Li, Wensheng; Xiao, Min; Gao, Hongxia; Liang, Zhiwu

doi:10.1016/j.apenergy.2017.05.135

Cited by 158 publications

(109 citation statements)

References 47 publications

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“…Several publications have described transient tests by applying step-changes in main inputs to the process in pilot plants with the purpose of generating data for dynamic process model validation [15,[24][25][26][27]. In addition, research is carried out to reduce the heat required for solvent regeneration [28,29].…”

Section: Introductionmentioning

confidence: 99%

Experimental results of transient testing at the amine plant at Technology Centre Mongstad: Open-loop responses and performance of decentralized control structures for load changes

Montañés

Flø

Nord

2018

International Journal of Greenhouse Gas Control

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Flexible operation of combined cycle thermal power plants with chemical absorption post combustion CO2 capture is a key aspect for the development of the technology. Several studies have assessed the performance of decentralized control structures applied to the post combustion CO2 capture process via dynamic process simulation, however there is a lack of published data from demonstration or pilot plants. In this work, experiments on transient testing were conducted at the amine plant at Technology Centre Mongstad, for flue gas from a combined cycle combined heat and power plant (3.7 to 4.1 CO2 vol%). The experiments include six tests on open-loop responses and eight tests on transient performance of decentralized control structures for fast power plant load change scenarios.The transient response of key process variables to changes in flue gas volumetric flow rate, solvent flow rate and reboiler duty were analyzed. In general the process stabilizes within 1h for 20% step changes in process inputs, being the absorber column absorption rates the slowest process variable to stabilize to changes in reboiler duty and solvent flow rate. Tests on fast load changes (10%/min) in flue gas flow rate representing realistic load changes in an upstream power plant showed that decentralized control structures could be employed in order to bring the process to desired off-design steady-state operating conditions within (<60 min). However, oscillations and instabilities in absorption and desorption rates driven by interactions of the capture rate and stripper temperature feedback control loops can occur when the rich solvent flow rate is changed significantly and fast as a control action to reject the flue gas volumetric flow rate disturbance and keeping liquid to gas ratio or capture rate constant.

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Section: Introductionmentioning

confidence: 99%

Experimental results of transient testing at the amine plant at Technology Centre Mongstad: Open-loop responses and performance of decentralized control structures for load changes

Montañés

Flø

Nord

2018

International Journal of Greenhouse Gas Control

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“…These main findings described above encourage research to develop new solvent formulations and blends that can improve the overall performance of the CO 2 capture process in terms of faster absorption kinetics, higher CO 2 absorption capacity, lower energy requirements for solvent regeneration and higher resistance to thermal and oxidative degradation [12][13][14][15].…”

Section: Introductionmentioning

confidence: 88%

Oxidative degradation of a novel AMP/AEP blend designed for CO2 capture based on partial oxy-combustion technology

Vega

Cano

Sanna

et al. 2018

Chemical Engineering Journal

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Solvent degradation and volatile compound emissions are two of the major concerns about the deployment of carbon capture technologies based on chemical absorption. In this context, partial oxy-combustion might reduce the solvent degradation due to the use of a higher CO 2 concentrated flue gas. This work evaluates the oxidative degradation of a novel AMP/AEP blend, namely POS #1, under partial oxy-combustion conditions. The effects of temperature and flue gas composition were evaluated in terms of solvent loss, degradation rates, NH 3 emissions and degradation products. The experiments were set at temperatures up to 70 ˚C and two levels of O 2 concentration-3%v/v and 6%v/v. The CO 2 concentration of the flue gas ranged between 15%v/v and 60%v/v CO 2. The novel solvent POS#1 showed high resistance to degrade and resulted in lower degradation rates than MEA in all the operating conditions evaluated in this work. The maximum degradation of AEP and AMP was 24% and 19%, respectively. MEA degraded almost double under the same conditions. Temperature and O 2 concentration enhanced the oxidative degradation of POS #1. However, the use of higher CO 2 concentration in the flue gas led to lower degradation rates of AEP and AMP and hence oxidative degradation was partially inhibited under partial oxycombustion conditions. The presence of higher CO 2 content in the flue gas decreased the NH 3 production and a 70% reduction of its emissions was achieved as the CO 2 concentration shifted from 15%v/v to 60%v/v. Other major degradation compounds such as formate and 2,4-lutidine were also decreased. New degradation products were not identified so that the suggested degradation pathways proposed in the literature were not influenced by the presence of higher CO 2 concentrations.

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“…Another method is also to compare the cyclic capacity of each cycle and if there is no significant decrease, then the nanoparticle is said to possess excellent stability and can be implemented in CO 2 capture [93]. Another study reported on the amount of CO 2 released (mol) for each regeneration cycle and is an indicator regarding the particle's stability and ability to be recycled [106]. The changes in heat duty or energy consumption reported in each cycle can also be another indicator [107].…”

Section: Nanoparticle Selection Criteriamentioning

confidence: 99%

A Review on Enhancing Solvent Regeneration in CO2 Absorption Process Using Nanoparticles

Rozaiddin

Lau

2022

Sustainability

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The employment of nanoparticles in solvents is a promising method to reduce the energy consumption during solvent regeneration. Numerous experimental and theoretical studies have been conducted to investigate the remarkable enhancement of nanoparticles. Yet, there are limited reviews on the mechanistic role of nanoparticles in enhancing the solvent regeneration performance. This review addresses the recent development on the employment of various nanoparticles, which include metals oxides, zeolites and mesoporous silicas, to enhance the mass and heat transfer, which subsequently minimize the solvent regeneration energy. The enhancement mechanisms of the nanoparticles are elaborated based on their physical and chemical effects, with a comprehensive comparison on each nanoparticle along with its enhancement ratio. This review also provides the criteria for selecting or synthesizing nanoparticles that can provide a high regeneration enhancement ratio. Furthermore, the future research prospects for the employment of nanoparticles in solvent regeneration are also recommended.

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Reduction of energy requirement of CO2 desorption from a rich CO2-loaded MEA solution by using solid acid catalysts

Cited by 158 publications

References 47 publications

Experimental results of transient testing at the amine plant at Technology Centre Mongstad: Open-loop responses and performance of decentralized control structures for load changes

Experimental results of transient testing at the amine plant at Technology Centre Mongstad: Open-loop responses and performance of decentralized control structures for load changes

Oxidative degradation of a novel AMP/AEP blend designed for CO2 capture based on partial oxy-combustion technology

A Review on Enhancing Solvent Regeneration in CO2 Absorption Process Using Nanoparticles

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