Comparative evaluation of xerogel-based activated carbons synthesized from aliphatic aldehydes of different chain lengths

被引:19
作者
Basta, A. H. [1 ]
El-Saied, H. [1 ]
Baraka, A. M. [2 ]
Lotfy, V. F. [1 ]
机构
[1] Natl Res Ctr, Cellulose & Paper Dept, El Buhous St, Cairo 12622, Egypt
[2] Cairo Univ, Dept Chem, Fac Sci, Giza, Egypt
关键词
Aliphatic aldehydes; new carbon xerogels; CAPACITIVE DEIONIZATION; CRESOL-FORMALDEHYDE; ORGANIC XEROGELS; AEROGELS; ADSORPTION; PHENOL; RESORCINOL; GELS; POLYMERIZATION; TANNIN;
D O I
10.1080/1539445X.2016.1212065
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
This work deals with examining the performance of xerogel-based activated carbons (XACs), which were synthesized from aliphatic aldehydes of different carbon chain lengths. These XACs were compared with those synthesized from commonly synthesized XACs. The performance of the new xerogels was determined by examining the thermo-gravimetric analysis (TGA) and Fourier transform infrared (FTIR); however, the XACs were studied using infrared spectra (IR), scanning electron microscopy (SEM), and their adsorption capacities in gas and aqueous media (nitrogen adsorption, iodine number, adsorption of phenol and methylene blue, MB). The adsorption behavior of these investigated XACs to MB was studied in detail, using the Langmuir and Freundlich adsorption equations, in addition to kinetic (Lagergren first-order and pseudo-second-order) and thermodynamic models. The results show that long -chain aldehydes have a significant effect on increasing the total pore volume (V-T). Glutaraldehyde-based carbon xerogel is recommended as an economically superior adsorbent with an S-BET x yield of 571.9 m(2)/g. XACs from glutaraldehyde and propionaldehyde have higher surface area than commonly synthesized ACs from formaldehyde (F), Phenol/F, Tanin/F-, Polybenzooxazine/F, and Pyrogallol/F. The best models used for MB adsorption onto XACs are Langmuir and pseudo-second-order kinetic equations. The negative values of thermodynamic parameter Go and positive values of Ho indicate the MB adsorption process is spontaneous and endothermic.
引用
收藏
页码:297 / 308
页数:12
相关论文
共 53 条
[1]   Preparation and properties of resorcinol-formaldehyde organic and carbon gels [J].
Al-Muhtaseb, SA ;
Ritter, JA .
ADVANCED MATERIALS, 2003, 15 (02) :101-+
[2]   Tannin-based xerogels with distinctive porous structures [J].
Amaral-Labat, G. ;
Grishechko, L. I. ;
Fierro, V. ;
Kuznetsov, B. N. ;
Pizzi, A. ;
Celzard, A. .
BIOMASS & BIOENERGY, 2013, 56 :437-445
[3]   Capacitive deionization as an electrochemical means of saving energy and delivering clean water. Comparison to present desalination practices: Will it compete? [J].
Anderson, Marc A. ;
Cudero, Ana L. ;
Palma, Jesus .
ELECTROCHIMICA ACTA, 2010, 55 (12) :3845-3856
[4]  
[Anonymous], 2009, D2854 ASTM INT
[5]   Effect of deashing rice straws on their derived activated carbons produced by phosphoric acid activation [J].
Basta, A. H. ;
Fierro, V. ;
Saied, H. ;
Celzard, A. .
BIOMASS & BIOENERGY, 2011, 35 (05) :1954-1959
[6]   2-Steps KOH activation of rice straw: An efficient method for preparing high-performance activated carbons [J].
Basta, A. H. ;
Fierro, V. ;
Ei-Saied, H. ;
Celzard, A. .
BIORESOURCE TECHNOLOGY, 2009, 100 (17) :3941-3947
[7]  
Basta A. H., 1999, INT J POLYM MATER, V44, P1
[8]  
Basta A.H., 1998, Int. J. Polym. Mater., V42, P1, DOI [10.1080/00914039808041056, DOI 10.1080/00914039808041056]
[9]   Evaluation of Rice Straw-Based Hydrogels for Purification of Wastewater [J].
Basta, Altaf H. ;
El-Saied, Houssni ;
El-Hadi, Omar ;
El-Dewiny, Camilia .
POLYMER-PLASTICS TECHNOLOGY AND ENGINEERING, 2013, 52 (11) :1074-1080
[10]  
Calvo EG, 2011, NANOMATERIALS, P187