Asphal-derived high surface area activated porous carbons for the effective adsorption separation of ethane and ethylene

被引：107

作者：

Liang, Wanwen ^{[1
]}

Zhang, Yufan ^{[2
]}

Wang, Xingjie ^{[2
]}

Wu, Ying ^{[1
]}

Zhou, Xin ^{[2
]}

Xiao, Jing

Li, Yingwei ^{[1
]}

Wang, Haihui ^{[2
]}

Li, Zhong ^{[1
,3
]}

机构：

[1] South China Univ Technol, Sch Chem & Chem Engn, Guangzhou 510640, Guangdong, Peoples R China

[2] South China Univ Technol, Key Lab Enhanced Heat Transfer & Energy Conversat, Guangzhou 510640, Guangdong, Peoples R China

[3] State Key Lab Subtrop Bldg Sci China, Guangzhou 510640, Guangdong, Peoples R China

来源：

CHEMICAL ENGINEERING SCIENCE | 2017年 / 162卷

基金：

中国国家自然科学基金;

关键词：

Ethane/ethylene separation; Asphalt; Porous carbons; Ethane-selective; Adsorption; METAL-ORGANIC FRAMEWORKS; SELECTIVE ADSORPTION; CO2; CAPTURE; NITROGEN; ETHANE/ETHYLENE; PERFORMANCE; ADSORBENTS; IRMOF-8; OLEFIN; ZIF-7;

D O I：

10.1016/j.ces.2017.01.003

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

We reported novel asphalt-based activated carbons (A-ACs) with high C2H6/C2H4 adsorption capacity and selectivity. A series of A-ACs were prepared by a one-step preparation method and characterized. The adsorption performances of A-ACs for ethane/ethylene were examined. Results showed that the sample A-ACs prepared at 800 degrees C and the KOH/asphalt ratio = 4 exhibited ultra-high BET area of 3111 m(2)/g and its pore volume reached 1.92 cm(3)/g. Their surface O and N contents gradually decreased with activation temperature or KOH/asphalt ratio at which A-ACs were prepared. More interestingly, A-ACs showed significantly preferential adsorption of C2H6 over C2H4. It could be ascribed to the stronger interaction of C2H6 with the surfaces of A-ACs by hydrogen bonds compared to C2H4, which were revealed by Density functional theory calculation. Its C2H6 adsorption capacity was up to 7.2 mmol/g at 100 kPa and 25 degrees C and its C2H6/C2H4 adsorption selectivity for typical cracked gas mixture (15:1 ethylene/ethane) was in the range of 3.2-16.3 at the pressure below 100 kPa, higher than the most reported ethane adsorbents. Additionally, the isosteric heat of ethane and ethylene adsorption on A-ACs were lower than those on n-complexation adsorbents. Therefore, these excellent adsorption properties would make A-ACs as a type of promising adsorbents for adsorption separation of C2H6/C2H4. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：192 / 202

页数：11

共 41 条

[21] Effect of activating agents on the development of microporosity in polymeric-based carbon for CO2 adsorption [J].

Ludwinowicz, Jowita ;

Jaroniec, Mietek .

CARBON, 2015, 94 :673-679

[22] Ethane/ethylene separation on a copper benzene-1,3,5-tricarboxylate MOF [J].

Martins, Vanessa F. D. ;

Ribeiro, Ana M. ;

Ferreira, Alexandre ;

Lee, U-Hwang ;

Hwang, Young Kyu ;

Chang, Jong-San ;

Loureiro, Jose M. ;

Rodrigues, Alirio E. .

SEPARATION AND PURIFICATION TECHNOLOGY, 2015, 149 :445-456

[23] Understanding Gas Adsorption Selectivity in IRMOF-8 Using Molecular Simulation [J].

Pillai, Renjith S. ;

Pinto, Moises L. ;

Pires, Joao ;

Jorge, Miguel ;

Gomes, Jose R. B. .

ACS APPLIED MATERIALS & INTERFACES, 2015, 7 (01) :624-637

[24] Ethane Selective IRMOF-8 and Its Significance in Ethane-Ethylene Separation by Adsorption [J].

Pires, Joao ;

Pinto, Moises L. ;

Saini, Vipin K. .

ACS APPLIED MATERIALS & INTERFACES, 2014, 6 (15) :12093-12099

[25] Olefins from conventional and heavy feedstocks: Energy use in steam cracking and alternative processes [J].

Ren, T ;

Patel, M ;

Blok, K .

ENERGY, 2006, 31 (04) :425-451

[26] Past progress and future challenges in adsorption research [J].

Ruthven, DM .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2000, 39 (07) :2127-2131

[27] Comprehensive study of ultra-microporous nitrogen-doped activated carbon for CO2 capture [J].

Sethia, Govind ;

Sayari, Abdelhamid .

CARBON, 2015, 93 :68-80

[28] Seven chemical separations to change the world [J].

Sholl, David S. ;

Lively, Ryan P. .

NATURE, 2016, 532 (7600) :435-437

[29] REPORTING PHYSISORPTION DATA FOR GAS SOLID SYSTEMS WITH SPECIAL REFERENCE TO THE DETERMINATION OF SURFACE-AREA AND POROSITY (RECOMMENDATIONS 1984) [J].

SING, KSW ;

EVERETT, DH ;

HAUL, RAW ;

MOSCOU, L ;

PIEROTTI, RA ;

ROUQUEROL, J ;

SIEMIENIEWSKA, T .

PURE AND APPLIED CHEMISTRY, 1985, 57 (04) :603-619

[30] Adsorption performance of a MIL-101(Cr)/graphite oxide composite for a series of n-alkanes [J].

Sun, Xuejiao ;

Li, Yujie ;

Xi, Hongxia ;

Xia, Qibin .

RSC ADVANCES, 2014, 4 (99) :56216-56223

← 1 2 3 4 5 →