Abstract
Imidazolate framework ZIF-8 is modified via postsynthetic method using etheylenediamine to improve its adsorption performance toward CO2. Results show that the BET surface area of the modified ZIF-8 (ED-ZIF-8) increases by 39%, and its adsorption capacity of CO2 per surface area is almost two times of that on ZIF-8 at 298 K and 25 bar. H2O uptake on the ED-ZIF-8 become obviously lower compared to the ZIF-8. The ED-ZIF-8 selectivity for CO2/N2 adsorption gets significantly improved, and is up to 23 and 13.9 separately at 0.1 and 0.5 bar, being almost twice of those of the ZIF-8. The isosteric heat of CO2 adsorption (Qst) on the ED-ZIF-8 becomes higher, while Qst of N2 gets slightly lower compared to those on the ZIF-8 Furthermore, it suggests that the postsynthetic modification of the ZIF-8 not only improves its adsorption capacity of CO2 greatly, but also enhances its adsorption selectivity for CO2/N2/H2O significantly.
| Original language | English |
|---|---|
| Pages (from-to) | 2195-2206 |
| Number of pages | 12 |
| Journal | AICHE Journal |
| Volume | 59 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - Jun 2013 |
Fingerprint
Keywords
- Adsorption/gas
- Isosteric heat of adsorption
- Modification
- Selectivity
- ZIF-8
ASJC Scopus subject areas
- Chemical Engineering(all)
- Biotechnology
- Environmental Engineering
Cite this
Enhancement of CO2 Adsorption and CO2/N2 Selectivity on ZIF-8 via Postsynthetic Modification. / Zhang, Zhijuan; Xian, Shikai; Xia, Qibin; Wang, Haihui; Li, Zhong; Li, Jing.
In: AICHE Journal, Vol. 59, No. 6, 06.2013, p. 2195-2206.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Enhancement of CO2 Adsorption and CO2/N2 Selectivity on ZIF-8 via Postsynthetic Modification
AU - Zhang, Zhijuan
AU - Xian, Shikai
AU - Xia, Qibin
AU - Wang, Haihui
AU - Li, Zhong
AU - Li, Jing
PY - 2013/6
Y1 - 2013/6
N2 - Imidazolate framework ZIF-8 is modified via postsynthetic method using etheylenediamine to improve its adsorption performance toward CO2. Results show that the BET surface area of the modified ZIF-8 (ED-ZIF-8) increases by 39%, and its adsorption capacity of CO2 per surface area is almost two times of that on ZIF-8 at 298 K and 25 bar. H2O uptake on the ED-ZIF-8 become obviously lower compared to the ZIF-8. The ED-ZIF-8 selectivity for CO2/N2 adsorption gets significantly improved, and is up to 23 and 13.9 separately at 0.1 and 0.5 bar, being almost twice of those of the ZIF-8. The isosteric heat of CO2 adsorption (Qst) on the ED-ZIF-8 becomes higher, while Qst of N2 gets slightly lower compared to those on the ZIF-8 Furthermore, it suggests that the postsynthetic modification of the ZIF-8 not only improves its adsorption capacity of CO2 greatly, but also enhances its adsorption selectivity for CO2/N2/H2O significantly.
AB - Imidazolate framework ZIF-8 is modified via postsynthetic method using etheylenediamine to improve its adsorption performance toward CO2. Results show that the BET surface area of the modified ZIF-8 (ED-ZIF-8) increases by 39%, and its adsorption capacity of CO2 per surface area is almost two times of that on ZIF-8 at 298 K and 25 bar. H2O uptake on the ED-ZIF-8 become obviously lower compared to the ZIF-8. The ED-ZIF-8 selectivity for CO2/N2 adsorption gets significantly improved, and is up to 23 and 13.9 separately at 0.1 and 0.5 bar, being almost twice of those of the ZIF-8. The isosteric heat of CO2 adsorption (Qst) on the ED-ZIF-8 becomes higher, while Qst of N2 gets slightly lower compared to those on the ZIF-8 Furthermore, it suggests that the postsynthetic modification of the ZIF-8 not only improves its adsorption capacity of CO2 greatly, but also enhances its adsorption selectivity for CO2/N2/H2O significantly.
KW - Adsorption/gas
KW - Isosteric heat of adsorption
KW - Modification
KW - Selectivity
KW - ZIF-8
UR - http://www.scopus.com/inward/record.url?scp=84878136413&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84878136413&partnerID=8YFLogxK
U2 - 10.1002/aic.13970
DO - 10.1002/aic.13970
M3 - Article
VL - 59
SP - 2195
EP - 2206
JO - AICHE Journal
JF - AICHE Journal
SN - 0001-1541
IS - 6
ER -