Absorption of carbon dioxide by hydrogen donor under atmospheric pressure

Zhao, Yi; Zhang, Zili; Wang, Hao; Qian, Xinfeng

doi:10.1016/j.rser.2016.05.071

Cited by 5 publications

(1 citation statement)

References 36 publications

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“…Monoethanolamine (MEA) is a primary amine that is highly alkaline and can react quickly with CO 2 to form a carbamate compound, and when heated, the carbamate will decompose to desorb CO 2 . Monoethanolamine has the advantages of fast absorption rate, high absorption capacity, high selectivity and removal efficiency, and low solvent consumption, but CO 2 desorption requires high temperature and therefore high energy consumption, in addition, monoethanolamine is prone to foaming and degradation, and the addition of organic solvents and active agents to the solution can solve these problems [5]. Methyl diethanolamine (MDEA) has good chemical stability, the solvent is not easily degraded, and the absorption volume is large, but the absorption time is long.MEDA plays a catalyst-like role in the absorption of CO2, but when reacting with CO 2 , MEDA must be hydrolyzed before slowly reacting with CO 2 and generating sub-stable bicarbonate, which can lead to a slower absorption rate of MDEA, which is its biggest defect.…”

Section: Organic Amine Adsorbentsmentioning

confidence: 99%

Research progress of CO₂ separation technology by solvent absorption

Huang

2023

E3S Web Conf.

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The combustion of fossil fuels emits a large amount of CO2, which causes the greenhouse effect and leads to global warming and poses a serious threat to life on earth. CO2 capture technology can effectively reduce the concentration of CO2 in the atmosphere, alleviate the greenhouse effect, and improve the environment. CO2 capture technologies include absorption, membrane separation and adsorption separation, among which chemical absorption and separation have the advantages of high efficiency, low cost and easy availability of materials. In this paper, the advantages and disadvantages of three main chemical absorption and separation methods (inorganic reagents, organic amines and ionic liquids) adsorb CO2 are summarized. Among inorganic adsorbents, NH3·H2O can achieve rapid and efficient absorption of CO2, and it is relatively stable and not easy to degrade. Common types of organic amine adsorbents are monoethanolamine, methanolamine, and sterically hindered amine. However, it is difficult for a single organic amine adsorbent to meet the requirements of high absorption rate, high absorption capacity and low reaction heat at the same time. Therefore, mixing organic amine absorbents with different characteristics can improve their performance in absorbing CO2. Ionic liquids have the advantages of good thermal stability, very low saturation vapor pressure, and designable structure, and are a new type of CO2 adsorbent, but ionic liquids have high viscosity themselves. Combining ionic liquids with organic or inorganic porous materials to form loaded ionic liquid materials, which can be used as CO2 adsorbent not only to improve the separation effect, but also to avoid the problem of high viscosity caused by direct absorption of ionic liquids, thus improving CO2 adsorption efficiency.

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Section: Organic Amine Adsorbentsmentioning

confidence: 99%

Research progress of CO₂ separation technology by solvent absorption

Huang

2023

E3S Web Conf.

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Nanoscale zero‐valent Ni–Fe alloy catalyst featuring a dual galvanic effect to promote formate formation by CO₂ hydrogenation

Wang

Zhao

2021

Greenhouse Gases

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Global greenhouse effect is being exacerbated by continuously increasing CO 2 emissions. Hence, we prepared a nanoscale zero-valent Ni-Fe alloy featuring a dual galvanic effect to facilitate the formation of formate by CO 2 hydrogenation in this work. The properties of the bimetallic nanocatalyst were characterized by various techniques, such as X-ray photoelectron spectrometer, X-ray powder diffraction, and high-resolution transmission electron microscopy, indicating that the major phase composition was an alloy of Ni 0 and Fe 0 . According to the catalyst characterizations before and after the reaction, experimental phenomena, and related literatures, we proposed that the dual galvanic effect between Ni 0 and Fe 0 was an especially important mechanism to promote the release of BH 4-n (OH) n -(n = 0-3) from KBH 4 , which acted as the hydrogen donor for CO 2 . Furthermore, the optimization of process parameters was carried out to determine the optimal experimental conditions: the catalyst dosage was 1 g•L -1 , the KBH 4 concentration was 0.2 mol•L -1 , the reaction temperature was 65 °C, the solution pH was 9.5 and the flue gas velocity was 0.5 L•min -1 . The average CO 2 conversion efficiency and the formate selectivity reached 60.50 and 54.97%, respectively. Our research results can provide reference for the development of novel CO 2 resource utilization technologies.

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CO2 hydrogenation to formate over nano-scale zero-valent nickel catalyst under atmospheric pressure

Zhao

Wang

et al. 2018

Chemical Engineering Journal

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Absorption of carbon dioxide by hydrogen donor under atmospheric pressure

Cited by 5 publications

References 36 publications

Research progress of CO₂ separation technology by solvent absorption

Research progress of CO₂ separation technology by solvent absorption

Nanoscale zero‐valent Ni–Fe alloy catalyst featuring a dual galvanic effect to promote formate formation by CO₂ hydrogenation

CO2 hydrogenation to formate over nano-scale zero-valent nickel catalyst under atmospheric pressure

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Absorption of carbon dioxide by hydrogen donor under atmospheric pressure

Cited by 5 publications

References 36 publications

Research progress of CO2 separation technology by solvent absorption

Research progress of CO2 separation technology by solvent absorption

Nanoscale zero‐valent Ni–Fe alloy catalyst featuring a dual galvanic effect to promote formate formation by CO2 hydrogenation

CO2 hydrogenation to formate over nano-scale zero-valent nickel catalyst under atmospheric pressure

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Product

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Research progress of CO₂ separation technology by solvent absorption

Research progress of CO₂ separation technology by solvent absorption

Nanoscale zero‐valent Ni–Fe alloy catalyst featuring a dual galvanic effect to promote formate formation by CO₂ hydrogenation