Pine cone shell-based activated carbon used for CO2 adsorption

2016 ◽  
Vol 4 (14) ◽  
pp. 5223-5234 ◽  
Author(s):  
Kaimin Li ◽  
Sicong Tian ◽  
Jianguo Jiang ◽  
Jiaming Wang ◽  
Xuejing Chen ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Co2 Adsorption ◽  
Activated Carbons ◽  
Adsorption Performance ◽  
Pine Cone

After carbonization and activation, pine cone shell-based activated carbons were used to adsorb CO2, and presenting a good adsorption performance.

Probing the role of O-containing groups in CO2 adsorption of N-doped porous activated carbon

Nanoscale ◽  
2017 ◽  
Vol 9 (44) ◽  
pp. 17593-17600 ◽  
Author(s):  
Min Wang ◽  
Xiangqian Fan ◽  
Lingxia Zhang ◽  
Jianjun Liu ◽  
Beizhou Wang ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Co2 Adsorption ◽  
Activated Carbons ◽  
Adsorption Performance ◽  
Porous Activated Carbon

The coexistence of N and O species makes an important contribution to the ultra-high CO2 adsorption performance of porous activated carbons.

scholarly journals Effect of Ammonia Activation and Chemical Vapor Deposition on the Physicochemical Structure of Activated Carbons for CO2 Adsorption

Processes ◽  
2019 ◽  
Vol 7 (11) ◽  
pp. 801
Author(s):  
Liu ◽  
Li ◽  
Dong ◽  
Li ◽  
Feng ◽  
...  
Keyword(s):  
Chemical Vapor Deposition ◽  
Pore Structure ◽  
Nitrogen Content ◽  
Vapor Deposition ◽  
Co2 Adsorption ◽  
Activated Carbons ◽  
Chemical Vapor ◽  
Physical Activation ◽  
Adsorption Performance ◽  
Physicochemical Structure

Focusing on the bottlenecks of traditional physical activation method for the preparation of activated carbons (ACs), we established a simple and scalable method to control the physicochemical structure of ACs and study their CO2 adsorption performance. The preparation is achieved by ammonia activation at different volume fractions of ammonia in the mixture (10%, 25%, 50%, 75%, and 100%) to introduce the nitrogen-containing functional groups and form the original pores and subsequent chemical vapor deposition (CVD) at different deposition times (30, 60, 90, and 120 min) to further adjust the pore structure. The nitrogen content of ACs-0.1/0.25/0.5/0.75/1 increases gradually from 2.11% to 8.84% with the increase of ammonia ratio in the mixture from 10% to 75% and then decreases to 3.02% in the process of pure ammonia activation (100%), during which the relative content of pyridinium nitrogen (N-6), pyrrolidine (N-5), and graphite nitrogen (N-Q) increase sequentially but nitrogen oxygen structure (N-O) increase continuously. In addition, ACs-0.5 and ACs-0.75, with a relatively high nitrogen content (6.37% and 8.84%) and SBET value (1048.65 m2/g and 814.36 m2/g), are selected as typical samples for subsequent CVD. In the stage of CVD, ACs-0.5-60 and ACs-0.75-90, with high SBET (1897.25 and 1971.57 m2/g) value and an appropriate pore-size distribution between 0.5 and 0.8 nm, can be obtained with the extension of deposition time from 60 to 90 min. The results of CO2 adsorption test indicate that an adsorption capacity of ACs-0.75-90, at 800 mmHg, is the largest (6.87 mmol/g) out of all the tested samples. In addition, the comparison of CO2 adsorption performance of tested samples with different nitrogen content and pore structure indicates that the effect of nitrogen content seems to be more pronounced in this work.

Effects of activation temperature on densities and volumetric CO2 adsorption performance of alkali-activated carbons

Fuel ◽  
2019 ◽  
Vol 238 ◽  
pp. 232-239 ◽  
Author(s):  
Dawei Li ◽  
Jiaojiao Zhou ◽  
Yu Wang ◽  
Yuanyu Tian ◽  
Ling Wei ◽  
...  
Keyword(s):  
Co2 Adsorption ◽  
Activated Carbons ◽  
Activation Temperature ◽  
Adsorption Performance ◽  
Alkali Activated

scholarly journals Equilibrium and Kinetics of CO2 Adsorption by Coconut Shell Activated Carbon Impregnated with Sodium Hydroxide

Processes ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 201
Author(s):  
Chaiyot Tangsathitkulchai ◽  
Suravit Naksusuk ◽  
Atichat Wongkoblap ◽  
Poomiwat Phadungbut ◽  
Prapassorn Borisut
Keyword(s):  
Activated Carbon ◽  
Sodium Hydroxide ◽  
Co2 Adsorption ◽  
Activated Carbons ◽  
Nitrogen Adsorption ◽  
Coconut Shell ◽  
Type I ◽  
Equilibrium And Kinetics ◽  
Coconut Shell Activated Carbon ◽  
Kinetics Of

The equilibrium and kinetics of CO2 adsorption at 273 K by coconut-shell activated carbon impregnated with sodium hydroxide (NaOH) was investigated. Based on nitrogen adsorption isotherms, porous properties of the tested activated carbons decreased with the increase of NaOH loading, with the decrease resulting primarily from the reduction of pore space available for nitrogen adsorption. Equilibrium isotherms of CO2 adsorption by activated carbons impregnated with NaOH at 273 K and the pressure up to 100 kPa displayed an initial part of Type I isotherm with most adsorption taking place in micropores in the range of 0.7–0.9 nm by pore-filling mechanisms. The amount of CO2 adsorbed increased with the increase of NaOH loading and passed through a maximum at the optimum NaOH loading of 180 mg/g. The CO2 isotherm data were best fitted with the three-parameter Sips equation, followed by Freundlich and Langmuir equations. The pore diffusion model, characterized by the effective pore diffusivity (De), could well describe the adsorption kinetics of CO2 in activated carbons impregnated with NaOH. The variation of De with the amount of CO2 adsorbed showed three consecutive regions, consisting of a rapid decrease of De for CO2 loading less than 40 mg/g, a relatively constant value of De for the CO2 loading of 40–80 mg/g and a slow decrease of De for the CO2 loading of 80–200 mg/g. The maximum De occurred at the optimum NaOH loading of 180 mg/g, in line with the equilibrium adsorption results. The values of De varied from 1.1 × 10−9 to 5.5 × 10−9 m2/s, which are about four orders of magnitude smaller than the molecular diffusion of CO2 in air. An empirical correlation was developed for predicting the effective pore diffusivity with the amount of CO2 adsorbed and NaOH loading.

Optimization of production conditions for synthesis of chemically activated carbon produced from pine cone using response surface methodology for CO2 adsorption

RSC Advances ◽  
2015 ◽  
Vol 5 (114) ◽  
pp. 94115-94129 ◽  
Author(s):  
S. Khalili ◽  
B. Khoshandam ◽  
M. Jahanshahi
Keyword(s):  
Response Surface Methodology ◽  
Activated Carbon ◽  
Response Surface ◽  
Co2 Adsorption ◽  
Production Optimization ◽  
Pine Cone ◽  
Production Conditions

A new insight to the production optimization of activated carbon from pine cone using RSM methodology for CO2 adsorption.

Kinetics of CO2 Adsorption on Microwave Palm Shell Activated Carbon

2014 ◽  
Vol 1043 ◽  
pp. 224-228 ◽  
Author(s):  
Noor Shawal Nasri ◽  
Usman Dadum Hamza ◽  
Nor Aishah Saidina Amin ◽  
Jibril Mohammed ◽  
Murtala Musa Ahmed ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Co2 Adsorption ◽  
Activated Carbons ◽  
Diffusion Mechanism ◽  
Co2 Uptake ◽  
Intraparticle Diffusion Model ◽  
Palm Shell ◽  
Model Pore ◽  
Pseudosecond Order ◽  
Kinetics Of

Activated carbon was prepared from palm shell by pyrolysis followed by K2CO3 assisted microwave heating. Effects of temperature on adsorption capability and kinetics of the sorbent towards CO2 adsorption was also studied. The results indicated that, the amount CO2 adsorbed decrease as the adsorption temperature increases. The kinetic data were obtained using a static volumetric method at 303.15, 343.15, 378.15, and 443.15 K and at pressures up to 4 bar. The kinetics of CO2 adsorption on the activated carbons was examined using the pseudofirst-order equation and pseudosecond-order equations. Weber and Morris intraparticle diffusion model was applied to examine the mechanism of the adsorption system. Lowest CO2 uptake recorded was 0.3 mmol/g at 443.15 K and 0.5 bar while the highest was 7.45mmol/g obtained at 303.15 K and 4 bar. The kinetics followed pseudosecond-order model. Pore diffusion is not the sole rate diffusion mechanism.

Adsorption of Mercury Ion on Activated Carbons from Rice Husk

2012 ◽  
Vol 161 ◽  
pp. 162-166 ◽  
Author(s):  
Xiao Lan SONG ◽  
Ying Zhang ◽  
Cheng Yin Yan ◽  
Wen Juan Jiang ◽  
Hong Jiang Xie
Keyword(s):  
Activated Carbon ◽  
Adsorption Capacity ◽  
Rice Husk ◽  
Activated Carbons ◽  
Langmuir Model ◽  
Mercury Ion ◽  
Maximum Adsorption Capacity ◽  
Adsorption Performance ◽  
Monolayer Adsorption ◽  
Adsorption Data

The adsorption performance of mercury ion onto activated carbon prepared from rice husk with NaOH was carried out at initial concentration of 100 mg/L. The activated carbon obtained at 800 °C possessed the outstanding specific surface area of 2786 m2/g. And the results showed that the maximum adsorption capacity of Hg2+ was recorded as 342.0 mg/g due to abundant micropores of 1.076 nm. In addition, the adsorption data were well explained by the Langmuir model with the monolayer adsorption capacity of 555.6 mg/g.

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