DOI: 10.1016/j.jcou.2017.08.002
Scopus记录号: 2-s2.0-85027326024
论文题名: Synthesis of nitrogen enriched porous carbons from urea formaldehyde resin and their carbon dioxide adsorption capacity
作者: Tiwari D. ; Bhunia H. ; Bajpai P.K.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2017
卷: 21 起始页码: 302
结束页码: 313
语种: 英语
英文关键词: Carbon dioxide capture
; Isotherm
; Kinetics
; Nanocasting
; Regeneration
; Urea-formaldehyde resin
Scopus关键词: Adsorbents
; Adsorption
; Carbon capture
; Carbon dioxide
; Carbonization
; Characterization
; Cost effectiveness
; Desorption
; Enzyme kinetics
; Formaldehyde
; Gas adsorption
; Isotherms
; Mesoporous materials
; Metabolism
; Nitrogen
; Porous materials
; Resins
; Synthetic resins
; Thermogravimetric analysis
; Urea
; Adsorption-desorption cycles
; Carbon dioxide adsorption
; Carbon dioxide capture
; Isosteric heat of adsorption
; Nanocasting
; Nitrogen functional groups
; Regeneration
; Textural characterization
; Urea formaldehyde resins
英文摘要: Carbon dioxide capture needs development of cost effective CO2 capture technologies. This paper describes nitrogen enriched porous carbons synthesized from nanocasting technique using mesoporous silica as template and urea-formaldehyde resin as precursor. These carbon materials were evaluated as sorbents for CO2 capture by using a thermogravimetric analysis under dynamic conditions. Carbonization and physical activation with CO2 at different temperatures (500-800 °C) were carried out that resulted in the generation of different carbon adsorbents containing nitrogen functional groups. The textural characterization result reveals effect of nanocasting technique, which is confirmed from the generation of mesopores (0.644 cm3 g-1), micropores (0.123 cm3 g-1) and high surface area (337.07 m2 g-1) of adsorbent. The CO2 capture capacity depends more on the nitrogen functionalities in addition to textural properties and nitrogen content, as the sample synthesized at 700 °C shows highest uptake capacity of 1.3 mmol g-1. Furthermore, it was found that adsorbent can be easily regenerated, which was also seen by the lower value of isosteric heat of adsorption. Ten adsorption-desorption cycles show established materials' excellent stability as an adsorbent. Different kinetic models were fitted for the adsorption data and on the basis of correlation coefficient (R2), fractional order provided best fit with the experimental data. The heterogeneous nature of the adsorbent surface was seen by best fitting of Freundlich isotherm and from the pattern of isosteric heat of adsorption. Exothermic, spontaneous and feasible nature was suggested by thermodynamic parameters' values. The thermal energy needed for desorption of CO2 from the adsorbent surface was around 1.28 MJ per kg CO2. © 2017 Elsevier Ltd. All rights reserved. 资助项目: Department of Science and Technology, Government of West Bengal
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52656
Appears in Collections: 影响、适应和脆弱性
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Recommended Citation:
Tiwari D.,Bhunia H.,Bajpai P.K.. Synthesis of nitrogen enriched porous carbons from urea formaldehyde resin and their carbon dioxide adsorption capacity[J]. Journal of CO2 Utilization,2017-01-01,21