JOURNAL OF CHEMICAL THERMODYNAMICS
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2016
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IF 2.196
Lejun Feng,Danxing Zheng,Weijia Huang
In this work, three new working pairs, {fluoroethane (HFC161) + dimethylether tetraethylene glycol (DMETEG)}, {HFC161 + dimethylether triethylene glycol (DMETrEG)} and {HFC161 + dimethylether diethylene glycol (DMEDEG)}, are proposed for absorption power cycle. The working pairs are assessed from both thermodynamics and thermokinetic perspective. By combining the microcalorimetry and isothermal synthesis methods, an experimental apparatus was developed to simultaneously obtain the microcalorimetry and vapour–liquid equilibrium data. Then, the solubility and absorption enthalpy data of the three new working pairs were sync-measured at 303.15 K by this sync-measurement experimental apparatus. The thermodynamics data indicated that the affinities of the three working pairs increased from strong to weak in the following order: HFC161 + DMETEG > HFC161 + DMETrEG > HFC161 + DMEDEG. Then the thermokinetic parameters of the absorption rate constant and activation energy were analysed based on the thermokinetic experiment at (303.15, 313.15, 323.15, and 333.15) K. As a result, the affinities of the three working pairs are consistent with the previous thermodynamics study. In addition, the intermolecular interactions within the three systems were analysed according to the intermolecular hydrogen bonds; overall, the (HFC161 + DMETEG) system is considered to be the potential option for applications.
研究领域:
化学工程
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热力学
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
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2015
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IF 2.679
Guoqiang Han,Yaotai Jiang,Dongshun Deng,Ning Ai
Five biobased solvents (BBSs) with high boil point, namely ethyl levulinate (EL), butyl levulinate (BL), dibutyl succinate (DBS), gamma-butyrolactone (GBL) and gamma-valerolactone (GVL), were applied in absorption of SO 2 . The solubilities of SO 2 in the BBSs were determined at temperatures (293.15 to 333.15) K and pressures (0 to 120) kPa. Henry’s constant and thermodynamic properties (standard dissolution Gibbs energy, dissolution enthalpy, dissolution entropy) were further calculated according to the solubility data. The gravimetric solubilities in BBSs changed with the sequence of GBL > GVL > EL > BL > DBS. The solubility of SO 2 and absorption enthalpy in present BBSs and other molecular solvents as well as ionic liquids (ILs) were systemically compared. The results illustrated that GBL and GVL possessed the potentiality to capture SO 2 among all absorbents due to their relatively large solubility and low absorption enthalpy for SO 2 , biodegradability, low toxicity, inexpensive cost and low viscosity.
研究领域:
环境科学
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化学工程
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2013
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IF 2.206
Jie Ren,Linbo Wu,Bo-Geng Li
Simple solutions of alkali metal salts of 1,2,4-triazole (TrizM) in polyethyelene glycol (PEG) and dimethylsulfoxide (DMSO) were prepared and assessed for CO2 capture. These aprotic heterocyclic anions (AHAs) containing solutions exhibit excellent CO2 capture performances. The TrizM salts absorb CO2 chemically in a 1:1 stoichiometry. What is more attractive is that the CO2 chemical absorption enthalpies are as low as −33 ∼ −21 kJ mol–1, close to that of physical absorption by traditional ionic liquids (ILs). This makes regeneration of the absorbents highly energy-saving. The TrizM-PEG solution has a steady CO2 capture performance due to the nonvolatility of PEG, and therefore, it is durable for CO2 capture. In comparison, the TrizM-DMSO solution has a higher absorption capacity (120 mg/g solution) because of the higher solubility of TrizM. Such simple and inexpensive solutions show new potential as promising candidates for highly efficient, energy-saving, and economical CO2 catchers.
研究领域:
化学工程
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环境科学
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DOI
高影响因子
AICHE JOURNAL
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2015
·Vol. 61
·期 6
·2028-2034
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IF 2.748
Kaihong Chen,Wenjun Lin,Xini Yu,Xiaoyan Luo,Fang Ding,Xi He,Haoran Li,Congmin Wang
Five kinds of anion-functionalized ionic liquids (ILs) with different basicity and substituent were selected, prepared and applied in the capture of SO 2 from flue gas, where the concentration of SO 2 is only 2000 ppm. The effect of the anion on SO 2 absorption capacity, desorption residue, and available absorption capacity under 2000 ppm was investigated. The relationship between available absorption capacity and absorption enthalpy was also studied. Through a combination of thermodynamic analysis and quantum calculation, the results indicated that the effect of the cation in the IL on absorption enthalpy was significant. However, the effect of chain length in the cation was weak. Hence, a new IL with low molecular weight, [P 4442 ][Tetz], was further designed and applied for the capture of SO 2 , which shows the high absorption capacity of 0.18 g SO 2 per g IL and excellent reversibility for 2000 ppm SO 2 . © 2015 American Institute of Chemical Engineers AIChE J , 61: 2028–2034, 2015
研究领域:
环境科学
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化学工程
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Jiaming Mao,Chang Li,Yanbin Yun,Jia Liu,Wenjuan Yang,Meng Li,Lihua Wang,Chunli Li,Wenli Liu
To reduce the energy consumption for solvent regeneration and mitigate the corrosiveness of saturated solvents, dual-functionalized ionic liquid (IL) [DMAPA][TZ] was synthesized as a primary absorbent, and mixed with a phase separation accelerator poly (ethylene glycol) dimethyl ether (NHD) or propylene carbonate (PC) as biphasic solvents, to achieve high efficiency, energy savings, and corrosion inhibition of post-combustion CO 2 capture. The results demonstrated a transition from a homogeneous solvent to a biphasic system upon CO 2 absorption, with the majority of CO 2 being concentrated in the rich phase, which is related to the formation of hydrogen bonds. Molecular dynamics analysis showed that interaction between the IL and PC is significantly stronger than that with NHD, resulting in a reduced absorption capacity of IL-PC relative to IL-NHD, while NHD effectively suppressed the formation of HCO 3 − /CO 3 2− . At 373 K, both solvents exhibited efficient regeneration of their respective rich phases within 10 min. The calculated absorption enthalpies for IL-NHD and IL-PC are remarkably low at 0.662 and 0.772 GJ·t −1 , respectively, and the regeneration energy consumption of IL-NHD was lower to 1.387 GJ·t −1 . Notably, the phase separation accelerator exerts a significant influence on the phase-transition behavior and absorption products of biphasic solvents. Furthermore, ILs effectively inhibited corrosion through the adsorption-passivation mechanism; specifically, the corrosion rate of the CO 2 -rich phase in IL-NHD relative to 20# carbon steel was only 0.1896 mpy, which is only 1/865 of the rate of the saturated 5 M MEA solution.
研究领域:
化学工程
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环境科学
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材料科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）