Abstract:Removal of SO2 and its accurate prediction from the flue gases emitted from various chemical industries in a techno‐econo‐enviro manner is of great importance. The experiments were conducted in a bubble column to study the absorption of SO2 into dimethyl amine (DMA) solution from simulated gas stream as absorption of SO2 in DMA solution yields an ionic liquid. The effects of DMA concentration, initial SO2 concentration, absorbent temperature, and the initial pH value of absorbent on SO2 removal were investigat… Show more
“…In addition, an electronic balance (Mettler-Toledo AL204) with standard uncertainty of 0.0002 g was used to determine the mass of absorbents added into the EC. In a typical run, a known amount of absorbent (w) was placed into EC, and the air in the whole system was wiped off using the oil pump (6). The temperature of water bath 2 for GR was always kept at 300.15 K, while the other for EC was kept at each desired temperature.…”
Section: Preparation Of Ils Tetraethylammonium Furoate ([N 2222 ][Fa]...mentioning
confidence: 99%
“…Nowadays, many new substances and materials have been studied to capture SO 2 from flue gas such as organic solvents, − deep eutectic solvents (DESs), metal–organic frameworks (MOFs), supported ionic liquid phase materials, , etc. However, the practical utilization of these are subject to secondary pollution, high cost of the operation processes, unknown toxicity, loss of structural integrity, limited reusability of the absorbents, and so on.…”
Carboxylate
ionic liquid (IL) and polyethylene glycol 200 (PEG200)
mixtures are suitable for the absorption of acidic SO2 because
of their unique properties. In the present work, tetraethylammonium
furoate ([N2222][FA]) and choline furoate ([Ch][FA]) were
blended with PEG200 to form 40 wt % ILs/PEG200 mixtures as SO2 absorbents. The solubilities of SO2 in these two
ILs/PEG200 mixtures were measured at T = (303.15,
313.15, 323.15, and 333.15) K and pressure up to 1.2 bar. [N2222][FA]/PEG200 demonstrated the high SO2 absorption capacity
of 7.224 mol per kg absorbent at 303.15 K and 1.0 bar. The chemisorption
mechanism of SO2 by mixture was studied by Fourier transform
infrared and nuclear magnetic resonance spectra, and the influence
of cations on the SO2 absorption capacity was analyzed.
Furthermore, the reaction equilibrium thermodynamic model was used
to correlate the experimental data, and Henry’s law constant
(H), reaction equilibrium constant (K
0), and thermodynamic properties (Δr
G
m
0, Δr
H
m
0, and Δr
S
m
0) were derived.
The absorption enthalpies of the two binary mixtures are −46.39
and −23.07 kJ·mol–1 for the two mixtures,
respectively. Considering the low cost, biodegradability of the materials,
high capacity, and low absorption enthalpy, the [N2222][FA]/PEG200
mixture was regarded to be an attractive and promising alternative
to pure ILs and ordinary solvent as a desulfurizer.
“…In addition, an electronic balance (Mettler-Toledo AL204) with standard uncertainty of 0.0002 g was used to determine the mass of absorbents added into the EC. In a typical run, a known amount of absorbent (w) was placed into EC, and the air in the whole system was wiped off using the oil pump (6). The temperature of water bath 2 for GR was always kept at 300.15 K, while the other for EC was kept at each desired temperature.…”
Section: Preparation Of Ils Tetraethylammonium Furoate ([N 2222 ][Fa]...mentioning
confidence: 99%
“…Nowadays, many new substances and materials have been studied to capture SO 2 from flue gas such as organic solvents, − deep eutectic solvents (DESs), metal–organic frameworks (MOFs), supported ionic liquid phase materials, , etc. However, the practical utilization of these are subject to secondary pollution, high cost of the operation processes, unknown toxicity, loss of structural integrity, limited reusability of the absorbents, and so on.…”
Carboxylate
ionic liquid (IL) and polyethylene glycol 200 (PEG200)
mixtures are suitable for the absorption of acidic SO2 because
of their unique properties. In the present work, tetraethylammonium
furoate ([N2222][FA]) and choline furoate ([Ch][FA]) were
blended with PEG200 to form 40 wt % ILs/PEG200 mixtures as SO2 absorbents. The solubilities of SO2 in these two
ILs/PEG200 mixtures were measured at T = (303.15,
313.15, 323.15, and 333.15) K and pressure up to 1.2 bar. [N2222][FA]/PEG200 demonstrated the high SO2 absorption capacity
of 7.224 mol per kg absorbent at 303.15 K and 1.0 bar. The chemisorption
mechanism of SO2 by mixture was studied by Fourier transform
infrared and nuclear magnetic resonance spectra, and the influence
of cations on the SO2 absorption capacity was analyzed.
Furthermore, the reaction equilibrium thermodynamic model was used
to correlate the experimental data, and Henry’s law constant
(H), reaction equilibrium constant (K
0), and thermodynamic properties (Δr
G
m
0, Δr
H
m
0, and Δr
S
m
0) were derived.
The absorption enthalpies of the two binary mixtures are −46.39
and −23.07 kJ·mol–1 for the two mixtures,
respectively. Considering the low cost, biodegradability of the materials,
high capacity, and low absorption enthalpy, the [N2222][FA]/PEG200
mixture was regarded to be an attractive and promising alternative
to pure ILs and ordinary solvent as a desulfurizer.
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