Oxygen-selective adsorption in RPM3-Zn metal organic framework

Cheng Yu Wang, Linxi Wang, Andrew Belnick, Hao Wang, Jing Li, Angela Lueking

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Development of an oxygen selective adsorbent is anticipated to reduce the material and energy requirements for adsorptive separations of air by a factor of four, due to the relative concentrations of N2 and O2 in air, thereby decreasing the parasitic energy losses, carbon dioxide emissions, and cost of oxygen purification via pressure-swing adsorption. Here, we report that RPM3-Zn (a.k.a. Zn2(bpdc)2(bpee); bpdc = 4,4′-biphenyldicarboxylate; bpee = 1,2-bipyridylethene) is oxygen selective over nitrogen at temperatures from 77 K to 273 K, although the oxygen capacity of the sorbent decreased markedly at increasing temperatures. Due to an oxygen diffusivity that is ∼1000-fold greater than nitrogen, the effective oxygen selectivity increases to near infinity at low temperature at equal contact times due to N2 mass transfer limitations for gate-opening. The kinetic limitation for N2 to open the structure has a sharp temperature dependence, suggesting this effective kinetic selectivity may be “tuned in” for other flexible metal-organic-frameworks. Although the low temperature oxygen selectivity is not practical to displace cryogenic distillation, the results suggest a new mechanism for tailoring materials for kinetic selectivity, namely, capitalizing upon the delayed opening process for a particular gas relative to another.

Original languageEnglish (US)
Pages (from-to)122-130
Number of pages9
JournalChemical Engineering Science
Volume165
DOIs
StatePublished - Jan 1 2017

Fingerprint

Metals
Oxygen
Adsorption
Kinetics
Nitrogen
Temperature
Sorbents
Air
Carbon Dioxide
Distillation
Cryogenics
Adsorbents
Purification
Energy dissipation
Carbon dioxide
Mass transfer
Gases
Costs

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

Cite this

Wang, C. Y., Wang, L., Belnick, A., Wang, H., Li, J., & Lueking, A. (2017). Oxygen-selective adsorption in RPM3-Zn metal organic framework. Chemical Engineering Science, 165, 122-130. https://doi.org/10.1016/j.ces.2017.02.020
Wang, Cheng Yu ; Wang, Linxi ; Belnick, Andrew ; Wang, Hao ; Li, Jing ; Lueking, Angela. / Oxygen-selective adsorption in RPM3-Zn metal organic framework. In: Chemical Engineering Science. 2017 ; Vol. 165. pp. 122-130.
@article{ee0d9a10fed74f908823a74bf374df29,
title = "Oxygen-selective adsorption in RPM3-Zn metal organic framework",
abstract = "Development of an oxygen selective adsorbent is anticipated to reduce the material and energy requirements for adsorptive separations of air by a factor of four, due to the relative concentrations of N2 and O2 in air, thereby decreasing the parasitic energy losses, carbon dioxide emissions, and cost of oxygen purification via pressure-swing adsorption. Here, we report that RPM3-Zn (a.k.a. Zn2(bpdc)2(bpee); bpdc = 4,4′-biphenyldicarboxylate; bpee = 1,2-bipyridylethene) is oxygen selective over nitrogen at temperatures from 77 K to 273 K, although the oxygen capacity of the sorbent decreased markedly at increasing temperatures. Due to an oxygen diffusivity that is ∼1000-fold greater than nitrogen, the effective oxygen selectivity increases to near infinity at low temperature at equal contact times due to N2 mass transfer limitations for gate-opening. The kinetic limitation for N2 to open the structure has a sharp temperature dependence, suggesting this effective kinetic selectivity may be “tuned in” for other flexible metal-organic-frameworks. Although the low temperature oxygen selectivity is not practical to displace cryogenic distillation, the results suggest a new mechanism for tailoring materials for kinetic selectivity, namely, capitalizing upon the delayed opening process for a particular gas relative to another.",
author = "Wang, {Cheng Yu} and Linxi Wang and Andrew Belnick and Hao Wang and Jing Li and Angela Lueking",
year = "2017",
month = "1",
day = "1",
doi = "10.1016/j.ces.2017.02.020",
language = "English (US)",
volume = "165",
pages = "122--130",
journal = "Chemical Engineering Science",
issn = "0009-2509",
publisher = "Elsevier BV",

}

Wang, CY, Wang, L, Belnick, A, Wang, H, Li, J & Lueking, A 2017, 'Oxygen-selective adsorption in RPM3-Zn metal organic framework', Chemical Engineering Science, vol. 165, pp. 122-130. https://doi.org/10.1016/j.ces.2017.02.020

Oxygen-selective adsorption in RPM3-Zn metal organic framework. / Wang, Cheng Yu; Wang, Linxi; Belnick, Andrew; Wang, Hao; Li, Jing; Lueking, Angela.

In: Chemical Engineering Science, Vol. 165, 01.01.2017, p. 122-130.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Oxygen-selective adsorption in RPM3-Zn metal organic framework

AU - Wang, Cheng Yu

AU - Wang, Linxi

AU - Belnick, Andrew

AU - Wang, Hao

AU - Li, Jing

AU - Lueking, Angela

PY - 2017/1/1

Y1 - 2017/1/1

N2 - Development of an oxygen selective adsorbent is anticipated to reduce the material and energy requirements for adsorptive separations of air by a factor of four, due to the relative concentrations of N2 and O2 in air, thereby decreasing the parasitic energy losses, carbon dioxide emissions, and cost of oxygen purification via pressure-swing adsorption. Here, we report that RPM3-Zn (a.k.a. Zn2(bpdc)2(bpee); bpdc = 4,4′-biphenyldicarboxylate; bpee = 1,2-bipyridylethene) is oxygen selective over nitrogen at temperatures from 77 K to 273 K, although the oxygen capacity of the sorbent decreased markedly at increasing temperatures. Due to an oxygen diffusivity that is ∼1000-fold greater than nitrogen, the effective oxygen selectivity increases to near infinity at low temperature at equal contact times due to N2 mass transfer limitations for gate-opening. The kinetic limitation for N2 to open the structure has a sharp temperature dependence, suggesting this effective kinetic selectivity may be “tuned in” for other flexible metal-organic-frameworks. Although the low temperature oxygen selectivity is not practical to displace cryogenic distillation, the results suggest a new mechanism for tailoring materials for kinetic selectivity, namely, capitalizing upon the delayed opening process for a particular gas relative to another.

AB - Development of an oxygen selective adsorbent is anticipated to reduce the material and energy requirements for adsorptive separations of air by a factor of four, due to the relative concentrations of N2 and O2 in air, thereby decreasing the parasitic energy losses, carbon dioxide emissions, and cost of oxygen purification via pressure-swing adsorption. Here, we report that RPM3-Zn (a.k.a. Zn2(bpdc)2(bpee); bpdc = 4,4′-biphenyldicarboxylate; bpee = 1,2-bipyridylethene) is oxygen selective over nitrogen at temperatures from 77 K to 273 K, although the oxygen capacity of the sorbent decreased markedly at increasing temperatures. Due to an oxygen diffusivity that is ∼1000-fold greater than nitrogen, the effective oxygen selectivity increases to near infinity at low temperature at equal contact times due to N2 mass transfer limitations for gate-opening. The kinetic limitation for N2 to open the structure has a sharp temperature dependence, suggesting this effective kinetic selectivity may be “tuned in” for other flexible metal-organic-frameworks. Although the low temperature oxygen selectivity is not practical to displace cryogenic distillation, the results suggest a new mechanism for tailoring materials for kinetic selectivity, namely, capitalizing upon the delayed opening process for a particular gas relative to another.

UR - http://www.scopus.com/inward/record.url?scp=85014755856&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85014755856&partnerID=8YFLogxK

U2 - 10.1016/j.ces.2017.02.020

DO - 10.1016/j.ces.2017.02.020

M3 - Article

AN - SCOPUS:85014755856

VL - 165

SP - 122

EP - 130

JO - Chemical Engineering Science

JF - Chemical Engineering Science

SN - 0009-2509

ER -