Fundamental understanding of oxygen content in activated carbon on acetone adsorption desorption

Chen，Ruofei1,2; Han，Ning2; Li，Liqing1; Wang，Shaobin2; Ma，Xiancheng1; Wang，Chunhao1; Li，Hailong1; Li，Haoyang3; Zeng，Lin4

2020-04-01

10.1016/j.apsusc.2019.145211

APPLIED SURFACE SCIENCE   影响因子和分区

0169-4332

1873-5584

To explore the effect of O-containing surface functional groups on volatile organic compounds (VOC) adsorption, three kinds of activated carbons named as PC, PH and ZC, after KCO, KOH and ZnCl activation respectively, were prepared from tobacco stem. Under room temperature (298 K), the saturated adsorption capacities towards acetone of PC, PH and ZC agree well with the resultants of specific surface area. Noteworthy that the normalized adsorption capacity (adsorption value per area) of these activated carbons display a completely different trend, but positively correlated with the O content. Moreover, acetone desorption processes on these materials were also investigated, and the activation energy of desorption were calculated with the order of PC > PH > ZC. Through density functional theory calculation, we determine the nature difference of these activated carbons with varying O content that O-containing surface groups could obviously strengthen the interaction between acetone and carbon surface via the formed hydrogen bond or van der Waals force, and hence significantly improve the adsorption strength to affect the acetone adsorption and desorption process. This study advances the mechanism of O content in the form of surface functional groups during VOC adsorption/desorption process on activated carbons.

Biomass waste Density functional theory Porous carbon materials Temperature programmed desorption Volatile organic compound

EI ; SCI

英语

其他

China Scholarship Council[201706370064] ; [2015BAL04B02] ; National Natural Science Foundation of China[21376274]

Chemistry ; Materials Science ; Physics

Chemistry, Physical ; Materials Science, Coatings & Films ; Physics, Applied ; Physics, Condensed Matter

WOS:000516818700083

Elsevier B.V.

20200107979687

Acetone ; Activated carbon ; Activation energy ; Adsorption ; Chlorine compounds ; Hydrogen bonds ; Oxygen ; Porous materials ; Potassium hydroxide ; Temperature programmed desorption ; Van der Waals forces ; Volatile organic compounds ; Zinc chloride

Physical Chemistry:801.4 ; Chemical Operations:802.3 ; Chemical Products Generally:804 ; Probability Theory:922.1 ; Materials Science:951

MATERIALS SCIENCE

2-s2.0-85077248134

Scopus

1.School of Energy Science and Engineering,Central South University,Changsha,410083,China
2.WA School of Mines: Minerals,Energy and Chemical Engineering (WASM-MECE),Curtin University,Perth,6845,Australia
3.School of Materials Science and Engineering,Central South University,Changsha,410083,China
4.Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Chen，Ruofei,Han，Ning,Li，Liqing,et al. Fundamental understanding of oxygen content in activated carbon on acetone adsorption desorption[J]. APPLIED SURFACE SCIENCE,2020,508.

Chen，Ruofei.,Han，Ning.,Li，Liqing.,Wang，Shaobin.,Ma，Xiancheng.,...&Zeng，Lin.(2020).Fundamental understanding of oxygen content in activated carbon on acetone adsorption desorption.APPLIED SURFACE SCIENCE,508.

Chen，Ruofei,et al."Fundamental understanding of oxygen content in activated carbon on acetone adsorption desorption".APPLIED SURFACE SCIENCE 508(2020).