Study on the mechanism of the influence of HNO3 and HF acid treatment on the CO2 adsorption and desorption characteristics of coal

Adsorbing and salvaging extremely small quantities of lithium ion, high-performance ion-exchange type lithium ion adsorbent was prepared through the ion-sieve formation method. The method uses acid treatment after the synthesis of spinel-structured nano-Li1.33Mn1.67O4 precursor through the tartaric acid gel process. It has good selectivity and high efficiency in adsorbing lithium ion in seawater. The generated adsorbent showed a 28.2 mg/g lithium uptake from artificial seawater. This adsorbent further showed a difference reproducibility that was lower than 10% when subjected to five cycles of adsorption and desorption experiments.

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Photoluminescent crystalline-assembly of gold nanoclusters: Facile preparation with the mediation of hydroxyl-terminated hyperbranched polyethylenimine and its reversible response to CO2 adsorption and desorption

Chemical Engineering Journal ◽

10.1016/j.cej.2020.124129 ◽

2020 ◽

Vol 387 ◽

pp. 124129

Author(s):

Ran-Ran Wang ◽

Tong-Xian Zhang ◽

Yu Chen ◽

Li-Ping Yu

Keyword(s):

Co2 Adsorption ◽

Gold Nanoclusters ◽

Adsorption And Desorption ◽

Facile Preparation

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Development of Novel CeO2-based CO2 adsorbent and analysis on its CO2 adsorption and desorption mechanism

Energy Procedia ◽

10.1016/j.egypro.2017.03.1400 ◽

2017 ◽

Vol 114 ◽

pp. 2481-2487 ◽

Cited By ~ 5

Author(s):

Kohei Yoshikawa ◽

Masato Kaneeda ◽

Hidehiro Nakamura

Keyword(s):

Co2 Adsorption ◽

Adsorption And Desorption ◽

Desorption Mechanism ◽

Co2 Adsorbent

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CO2 adsorption and desorption properties of calcined layered double hydroxides

Journal of Thermal Analysis and Calorimetry ◽

10.1007/s10973-018-7152-8 ◽

2018 ◽

Vol 133 (2) ◽

pp. 869-879 ◽

Cited By ~ 4

Author(s):

S. Colonna ◽

M. Bastianini ◽

M. Sisani ◽

A. Fina

Keyword(s):

Layered Double Hydroxides ◽

Co2 Adsorption ◽

Adsorption And Desorption ◽

Double Hydroxides

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Synthesis of polypyrrole/Fe-kanemite nanocomposite through in situ polymerization: effect of iron exchange, acid treatment, and CO2 adsorption properties

Journal of Materials Science ◽

10.1007/s10853-016-0541-0 ◽

2016 ◽

Vol 52 (5) ◽

pp. 2460-2472 ◽

Cited By ~ 14

Author(s):

Bouhadjar Boukoussa ◽

Fatiha Abidallah ◽

Zakaria Abid ◽

Zoulikha Talha ◽

Nafissa Taybi ◽

...

Keyword(s):

Acid Treatment ◽

Co2 Adsorption ◽

In Situ Polymerization ◽

Adsorption Properties ◽

Iron Exchange

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Comparative Adsorption Isotherm for Beryllium Oxide/Iron (III) Oxide Toward CO2 Adsorption and Desorption Studies

Materials Science Forum ◽

10.4028/www.scientific.net/msf.1010.361 ◽

2020 ◽

Vol 1010 ◽

pp. 361-366

Author(s):

Azizul Hakim Lahuri ◽

Mohd Ambar Yarmo ◽

Maratun Najiha Abu Tahari ◽

Tengku Sharifah Marliza ◽

Tengku Shafazila Tengku Saharuddin ◽

...

Keyword(s):

Adsorption Isotherm ◽

Adsorption Process ◽

Co2 Adsorption ◽

Freundlich Isotherm ◽

Beryllium Oxide ◽

Isotherm Models ◽

Free Energy Of Adsorption ◽

Adsorption And Desorption ◽

Different Temperatures ◽

Physical Phenomena

Surface modification of Fe2O3 by adding BeO was synthesized and calcined at different temperatures of 200-600 °C. The adsorbents were characterized by using XRD, N2 adsorption-desorption isotherm prior to performing CO2 adsorption and desorption studies. The CO2 adsorption data were analyzed using adsorption isotherm models such as Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich. BeO/Fe2O3-300 that calcined at 300 °C showed the most efficient adsorbent with physisorption and chemisorption were measured at 5.85 and 45.88 mg/g respectively. The CO2 adsorption notably best fitted with Freundlich isotherm with R2 = 0.9897 and calculated adsorption capacity closest to experimental data. This implies the CO2 adsorption process was governed by multilayer adsorption on the heterogeneous surface of the adsorbent. The mean free energy of adsorption (E=3.536 kJ/mol) from Dubinin-Radushkevich and heat of adsorption (bT=3.219 kJ/mol) from the Temkin model support that the adsorption process is physical phenomena.

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