Insight into essential channel effect of pore structures and hydrogen bonds on the solvent extraction of oily sludge

2020 ◽  
Vol 389 ◽  
pp. 121826 ◽  
Author(s):  
Ming Zhao ◽  
Xiangyu Wang ◽  
Dong Liu ◽  
Zhiheng Li ◽  
Shuhai Guo ◽  
...  
Keyword(s):  
Solvent Extraction ◽  
Hydrogen Bonds ◽  
Oily Sludge ◽  
Channel Effect ◽  
Pore Structures ◽  
Insight Into

Insight into structure, stability and hydrogen bond in complexes of guanine and thymine at the molecular level using computational chemical method

2021 ◽  
Vol 11 (1) ◽  
pp. 127-134
Author(s):  
Nhung Ngo Thi Hong ◽  
Huong Dau Thi Thu ◽  
Trung Nguyen Tien
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Energy Surface ◽  
Covalent Bond ◽  
Electrostatic Energy ◽  
Substantial Contribution ◽  
Structure Stability ◽  
Dispersion Terms ◽  
Insight Into

Nine stable structures of complexes formed by interaction of guanine with thymine were located on potential energy surface at B3LYP/6-311++G(2d,2p). The complexes are quite stable with interaction energy from -5,8 to -17,7 kcal.mol-1. Strength of complexes are contributed by hydrogen bonds, in which a pivotal role of N−H×××O/N overcoming C−H×××O/N hydrogen bond, up to to 3.5 times, determines stabilization of complexes investigated. It is found that polarity of N/C−H covalent bond over proton affinity of N/O site governs stability of hydrogen bond in the complexes. The obtained results show that the N/C−H×××O/N red-shifting hydrogen bonds occur in all complexes, and a larger magnitude of an elongation of N−H compared C-H bond length accompanied by a decrease of its stretching frequency is detected in the N/C−H×××O/N hydrogen bond upon complexation. The SAPT2+ analysis indicates the substantial contribution of attractive electrostatic energy versus the induction and dispersion terms in stabilizing the complexes.

Insight into controllability and predictability of pore structures in pitch-based activated carbons

2018 ◽  
Vol 271 ◽  
pp. 118-127 ◽  
Author(s):  
Taotao Guan ◽  
Jianghong Zhao ◽  
Guoli Zhang ◽  
Dongdong Zhang ◽  
Baixin Han ◽  
...  
Keyword(s):  
Activated Carbons ◽  
Pore Structures ◽  
Insight Into

Molecular dynamics simulation insight into the temperature dependence and healing mechanism of an intrinsic self-healing polyurethane elastomer

2020 ◽  
Vol 22 (31) ◽  
pp. 17620-17631
Author(s):  
Xianling Chen ◽  
Jing Zhu ◽  
Yanlong Luo ◽  
Jun Chen ◽  
Xiaofeng Ma ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulation ◽  
Hydrogen Bonds ◽  
Molecular Diffusion ◽  
Healing Process ◽  
The Self ◽  
Dynamics Simulation ◽  
Polyurethane Elastomer ◽  
Self Healing ◽  
Insight Into

The changes in the type and number of hydrogen bonds as well as the microscopic behavior of molecular diffusion in the self-healing process of polyurethane are revealed.

scholarly journals Investigation on Pore Structures of a Medium Volatile Bituminous Coal with Solvent Extraction Tests

2013 ◽  
Vol 31 (3) ◽  
pp. 337-351 ◽  
Author(s):  
Xiaodong Zhang ◽  
Shulei Miao ◽  
Geoff X. Wang ◽  
Yong Qin ◽  
Shuxun Sang
Keyword(s):  
Solvent Extraction ◽  
Bituminous Coal ◽  
Pore Structures

scholarly journals Metal extraction from a deep eutectic solvent, an insight into activities

2020 ◽  
Vol 22 (19) ◽  
pp. 11012-11024 ◽  
Author(s):  
Peng Cen ◽  
Kastriot Spahiu ◽  
Mikhail S. Tyumentsev ◽  
Mark R. St. J. Foreman
Keyword(s):  
Solvent Extraction ◽  
Ethylene Glycol ◽  
Metal Complexes ◽  
Deep Eutectic Solvent ◽  
Metal Extraction ◽  
Insight Into

By using the SIT equation and solvent extraction to consider activities of chloride and metal complexes in the aqueous and ethylene glycol layers, it is figuratively like viewing the system through a special lens which makes everything clearer.

Research on Oily Sludge Treatment by Solvent Extraction

2013 ◽  
Vol 641-642 ◽  
pp. 156-159
Author(s):  
Yu Hua Meng ◽  
Chao Cheng Zhao ◽  
Qi You Liu ◽  
Xiu Xia Zhang
Keyword(s):  
Solvent Extraction ◽  
Organic Solvent ◽  
Petroleum Ether ◽  
Extraction Time ◽  
Oily Sludge ◽  
Residual Oil ◽  
Solid Mass ◽  
Optimum Conditions ◽  
Mass Rate ◽  
Optimum Parameters

This paper present the optimum conditions for treating oily sludge with organic solvent extraction and surfactant solutions using the single factor experiment. Firstly, selecting petroleum ether (boiling range is 60-90oC) as the organic solvent, then selecting the mixture of sodium dodecyl benzene sulfonate and alkylphenol ether(OP-10) as surfactant agent to extract residual crude oil. Results obtained through experiments, the optimum parameters of petroleum ether were that ultrasonic reaction temperature was 55 oC, ultrasonic intensity was 320W, ultrasonic extraction time was 5min, liquid/solid mass rate was 7.5, then under the optimum conditions, the residual oil rate was about 6%. While the optimum parameters of surfactant mixture were that the temperature was 55 oC, ultrasonic intensity was still 320W, ultrasonic extraction time was 10min, liquid/solid mass rate was 15, under the optimum conditions, finally the residual oil rate was only about 1%.

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