%0 Journal Article
%A Wang, Jun
%A Krishna, Rajamani
%A Yang, Jiangfeng
%A Deng, Shuguang
%D 2015
%T Hydroquinone
and Quinone-Grafted Porous Carbons for
Highly Selective CO2 Capture from Flue Gases and Natural
Gas Upgrading
%U https://acs.figshare.com/articles/journal_contribution/Hydroquinone_and_Quinone_Grafted_Porous_Carbons_for_Highly_Selective_CO_sub_2_sub_Capture_from_Flue_Gases_and_Natural_Gas_Upgrading/2144725
%R 10.1021/acs.est.5b01652.s001
%2 https://ndownloader.figshare.com/files/3778576
%K OAC
%K IAST
%K Natural Gas UpgradingHydroquinone
%K CO 2 adsorption capacity
%K N 2 adsorption isotherms
%K 1 atm
%K CH
%K scanning electron microscopy
%K transmission electron microscopy
%K flue gas treatment
%K Selective CO 2 Capture
%K adsorption separation properties
%X Hydroquinone and quinone functional
groups were grafted onto a
hierarchical porous carbon framework via the Friedel–Crafts
reaction to develop more efficient adsorbents for the selective capture
and removal of carbon dioxide from flue gases and natural gas. The
oxygen-doped porous carbons were characterized with scanning electron
microscopy, transmission electron microscopy, X-ray powder diffraction,
Fourier transform infrared spectroscopy, and Raman spectroscopy. CO2, CH4, and N2 adsorption isotherms were
measured and correlated with the Langmuir model. An ideal adsorbed
solution theory (IAST) selectivity for the CO2/N2 separation of 26.5 (298 K, 1 atm) was obtained on the hydroquinone-grafted
carbon, which is 58.7% higher than that of the pristine porous carbon,
and a CO2/CH4 selectivity value of 4.6 (298
K, 1 atm) was obtained on the quinone-grafted carbon (OAC-2), which
represents a 28.4% improvement over the pristine porous carbon. The
highest CO2 adsorption capacity on the oxygen-doped carbon
adsorbents is 3.46 mmol g–1 at 298 K and 1 atm.
In addition, transient breakthrough simulations for CO2/CH4/N2 mixture separation were conducted to
demonstrate the good separation performance of the oxygen-doped carbons
in fixed bed adsorbers. Combining excellent adsorption separation
properties and low heats of adsorption, the oxygen-doped carbons developed
in this work appear to be very promising for flue gas treatment and
natural gas upgrading.
%I ACS Publications