ENERGY & FUELS
·
2025
·
IF 5.3
Runfen Zheng,Lixin Wei,Yuxin Bai,Jianfei Man,Jian Ye,Huiping Zhang,Yihan Wang
To address the issues of poor regeneration performance and high regeneration energy consumption associated with traditional CO2 absorbents, the development of novel phase-change absorbents has become a key area of research. In this study, a new phase-change absorbent system, DEGDEE-AEEA-AMP, is developed, using N-(2-hydroxyethyl)ethylenediamine (AEEA) as the main absorbent, bis(2-ethoxyethyl)ether (DEGDEE) as the phase-separation agent, 2-amino-2-methyl-1-propanol (AMP) as the activator, and water as the solvent. The performance of this system is compared with that of monoethanolamine (MEA) at a 30% mass concentration, which serves as the reference standard. The study includes absorption, desorption, corrosion, cyclic absorption–desorption experiments, and regeneration energy consumption estimations. The results indicate that the volume of the rich phase in the DEGDEE-AEEA-AMP (DAP) system constitutes 56.7% of the total volume. When the AMP mass fraction is 15%, the absorption capacity reaches 2.52 mol·kg–1, which is 14.0% higher than that of MEA. The maximum desorption rate is 13.19 × 10–3 mol·kg–1·s–1, which is 3.39 times higher than that of MEA. The minimum regeneration energy consumption is 2.742 GJ·t–1 CO2, representing a 29.9% reduction compared to 30% MEA. The corrosion rate of the rich liquid is 0.230 mm/a, 1.32 times that of MEA, but it can be significantly reduced by adding anhydrous Na2SO3. When the AMP mass fraction is 15%, the DAP phase-change absorbent system exhibits high absorption and desorption performance, good cyclic stability, and lower regeneration energy consumption.
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2021
·Vol. 97
·期 5
·1275-1279
·
IF 3.174
Chunxiao Ren,Jisheng Li,Jingjing Wang,Siqi Jiang,Xin Guo,Jianguang Qi,Congzhe Jiao,Yichuan Wang,Yufeng Hu,Zhichang Liu
BACKGROUND A new catalyst mixture, namely trifluoromethanesulfonic acid + N -methylimidazolium trifluoromethanesulfonate (CF 3 SO 3 H + [mim][CF 3 SO 3 ]), is developed to overcome long-standing problems of commercial catalysts and catalytic distillation for 1,3,5-trioxane synthesis. CF 3 SO 3 H serves as a catalyst to accelerate the main reaction and [mim][CF 3 SO 3 ] serves as an extractive distillation agent to promote phase separation. Unlike the conventional design methods whose purpose is to increase catalytic activity and selectivity, this catalyst mixture is designed to significantly enhance phase separation. RESULTS Compared to commercial catalysts, the new catalyst mixture significantly increases product concentration in distillate, and significantly decreases byproduct concentration in reaction liquid phase and volatilization loss of reactant in reaction liquid phase. This catalyst mixture also considerably decreases corrosion rate and salting out effect of catalyst. CONCLUSIONS Our design approach is of general significance for catalytic distillation. As a real example, it is used to markedly improve the performances of commercial catalysts for 1,3,5-trioxane synthesis. © 2021 Society of Chemical Industry (SCI).
研究领域:
化学工程
·
催化化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Zhang Tianwei,Liu Xiangchen,Wang Guofeng,Liu Hao,Xiao Lei,Zhou Yihao,Liang Qiang,Zhang Cunwei
Combustion characteristics of hydrogen-containing syngas are distinct from those of traditional hydrocarbon fuels. However, the efficiency for any fire extinguishant on syngas/air flame suppression has not been validated up to now. In this study, we developed novel core-shell microstructured nanocomposites (CSMNs) with inner seawater for syngas/air fire extinguishing. To optimize the preparation conditions, we adopted a three-factor three-level Box-Behnken design (BBD). The corrosion rate and minimum extinguishing concentration of CSMNs were determined by corrosion tests and Cup-burner experiments, respectively. Results showed that the BBD method exhibits good agreement between experimental data and fitted models. By applying numerical optimization , we determined that solid mass fraction, rotation speed, and rotation time in a range of 2–10%, 4000–8000 rpm, and 60–180 s, respectively, are the optimal preparation conditions for the CSMN preparation. The degree of corrosion rate and mass concentration in co-flow gaseous fuel/air fire suppression were reduced by more than 50% compared to an aqueous seawater solution. The updated methods can be used to study the fire inhibition efficiency of the emerging class of composite materials with the core-shell structure. This does not only provide solutions for syngas/air flame inhibition, but it also gives new insight into the application of seawater for fire extinguishment.
研究领域:
燃烧学
·
材料科学
✓ 已验证
DOI
高影响因子
International Journal of Refrigeration
·
2025
·
IF 3.8
Yanlong Lv,Yutong Gong,Feng Liu,Yuhao Wang,Yunze Hao,Jiyuan Zhou,Jun Sui
Imidazolium-based ionic liquids exhibit significant potential as working fluids in absorption heat transformers, owing to their superior solubility and thermal stability. In this study, the corrosion rates of nine imidazolium-based ionic liquids, with mass concentrations ranging from 30% to 70%, were systematically evaluated. Based on these corrosion rate evaluations, further thermodynamic assessments were conducted on four key working pairs, namely [EMIM][MeSO 3 ]+H 2 O, [EMIM][Ac]+H 2 O, [EMIM]Cl+H 2 O, and [EMIM][DEP]+H 2 O, involving parameters including density, viscosity, specific heat capacity, and thermal stability. Polynomial fitting was applied using the least squares method. The results showed that the density, viscosity and specific heat capacity of these four working pairs were in the range of 0.98-1.18 g·cm −3 , 0.5-15.5 mPa·s and 2.3-4.0 J·g −1 ·°C −1 , respectively. Furthermore, all four ILs presented a significant thermal stability below 250°C, further confirming their suitability for heat pump technology. Among these four working pairs, both [EMIM][MeSO 3 ]+H 2 O and [EMIM]Cl+H 2 O exhibited lower viscosities and specific heat capacities. However, it should be noted that [EMIM][MeSO 3 ]+H 2 O demonstrated a substantially higher corrosion rate (reaching up to 734.84 μm∙y −1 ), making [EMIM]Cl+H 2 O the preferable option for most absorption transformers. This study establishes an experimental basis for the feasibility of the application of ionic liquids in absorption heat transformer cycle and provides data to support the selection of cleaning working pairs.
研究领域:
化学工程
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2023
·
IF 3.8
Hammad Saulat,Jianhua Yang,Tao Yan,Waseem Raza,Wensen Song,Gaohong He
Tungsten (W) incorporated mobil-type eleven (MEL) zeolite membrane (referred to as W-MEL membrane) with high separation performance was firstly explored for the separation of oil/water mixtures under the influence of gravity. W-MEL membranes were grown on stainless steel (SS) meshes through in-situ hydrothermal growth method facilitated with (3-aminopropyl)triethoxysilane (APTES) modification of stainless steel meshes, which promote the heterogeneous nucleation and crystal growth of W-MEL zeolites onto the mesh surface. W-MEL membranes were grown on different mesh size supports to investigate the effect of mesh size on the separation performance of the membrane. The as-synthesized W-MEL membrane supported on 500 mesh (25 μm) (W-MEL-500) exhibit the hydrophilic nature with a water contact angle of 11.8˚ and delivers the best hexane/water mixture separation with a water flux and separation efficiency of 46247 L·m −2 ·h −1 and 99.5%, respectively. The wettability of W-MEL membranes was manipulated from hydrophilic to hydrophobic nature by chemically modifying with the fluorine-free compounds (hexadecyltrimethoxysilane (HDTMS) and dodecyltrimethoxysilane (DDTMS)) to achieve efficient oil-permselective separation of heavy oils from water. Among the hydrophobically modified W-MEL membranes, W-MEL-500-HDTMS having a water contact angle of 146.4˚ delivers the best separation performance for dichloromethane/water mixtures with a constant oil flux and separation efficiency of 61490 L·m −2 ·h −1 and 99.2%, respectively along with the stability tested up to 20 cycles. Both W-MEL-500-HDTMS and W-MEL-500-DDTMS membranes also exhibit similar separation performances for the separation of heavy oil from sea water along with a 20-fold lower corrosion rate in comparison with the bare stainless-steel mesh, indicating their excellent stability in seawater. Compared to the reported zeolite membranes for oil/water separation, the as-synthesized and hydrophobically modified W-MEL membranes shows competitive separation performances in terms of flux and separation efficiency, demonstrating the good potentiality for oil/water separation.
研究领域:
材料科学
·
化学工程
·
环境工程
·
膜技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）