Activation and Adsorption Performance of Sewage Sludge Carbon for CO2: Unusual Enhancement Effect of HF Treatment

2021 ◽  
Author(s):  
Jingxiang Sun ◽  
Jinzhu Zhu ◽  
Shuanghong Tian ◽  
Yan Wen ◽  
Jinxi Feng ◽  
...  
Keyword(s):  
Citric Acid ◽  
Sewage Sludge ◽  
Co2 Adsorption ◽  
Enhancement Effect ◽  
Koh Activation ◽  
Adsorption Performance ◽  
Zncl2 Activation

To understand the dependence of activation processes of sludge carbons on CO2 adsorption, five sludge carbons (SC1-SC5) were prepared by direct pyrolysis, pyrolysis-citric acid (CA) activation, pyrolysis-(CA+ZnCl2) activation, pyrolysis-(CA+ZnCl2+KOH) activation...

Monosodium glutamate-mediated hierarchical porous formation in LTA zeolite to enhance CO2 adsorption performance

2021 ◽  
Author(s):  
Diogo P. S. Silva ◽  
Alef T. Santos ◽  
Thaís R. S. Ribeiro ◽  
Julyane R. S. Solano ◽  
Roberta K. B. C. Cavalcanti ◽  
...  
Keyword(s):  
Co2 Adsorption ◽  
Monosodium Glutamate ◽  
Adsorption Performance ◽  
Porous Formation ◽  
Lta Zeolite ◽  
Hierarchical Porous

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.

scholarly journals CO2 adsorption on biochar from co-torrefaction of sewage sludge and leucaena wood using microwave heating

2019 ◽  
Vol 158 ◽  
pp. 4435-4440 ◽  
Author(s):  
Yu-Fong Huang ◽  
Pei-Te Chiueh ◽  
Shang-Lien Lo
Keyword(s):  
Sewage Sludge ◽  
Microwave Heating ◽  
Co2 Adsorption

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.

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