Piperazine is an organic compound that consists of a six-membered ring containing two nitrogen atoms at opposite positions in the ring. 103-76-4, formula is C6H14N2O, Name is N-(2-Hydroxyethyl)piperazine. Piperazine exists as small alkaline deliquescent crystals with a saline taste. Formula: C6H14N2O.
Wang, Dongliang;Xie, Jiangpeng;Li, Guixian;Meng, Wenliang;Li, Jingwei;Li, Delei;Zhou, Huairong research published 《 Multiobjective Evaluation of Amine-Based Absorbents for SO2 Capture Process Using the pKa Mathematical Model》, the research content is summarized as follows. The screening of high-efficiency and low-energy consumption absorbents is critical for capturing SO2. In this study, absorbents with better performance are screened based on mechanism, model, calculation, verification, and anal. methods. The acidity coefficient (pKa) values of ethylenediamine (EDA), piperazine (PZ), 1-(2-hydroxyethyl)piperazine (HEP), 1,4-bis(2-hydroxyethyl)piperazine (DIHEP), and 1-(2-hydroxyethyl)-4-(2-hydroxypropyl)piperazine (HEHPP) are calculated by quantum chem. methods. A math. model of the SO2 cyclic absorption capacity per amine (αc) in the amine-based SO2 capture process is built based on the electroneutrality of the solution Another model of desorption reaction heat (Qdes) is also built based on the van′t Hoff equation. Correspondingly, αc and Qdes of the above five diamines are calculated and verified with the exptl. data. The results show that αc of the diamine changes with the increase in the pKa value, and the increase in the pKa value directly leads to changes in Qdes. The order of αc of the above five diamines is EDA > PZ > HEHPP > HEP > DIHEP, and the order of Qdes is EDA > PZ > HEHPP > DIHEP > HEP. The multiobjective anal. between αc and Qdes suggests that it is not advisable to simply pursue a higher αc while ignoring Qdes. The compound quaternary system absorbent has a wider range of αc than the single ternary absorbent, which is the direction of absorbent development. This study is expected to strengthen absorbent screening for the amine-based SO2 capture process from flue gas.
103-76-4, 1-(2-Hydroxyethyl)piperazine is a useful research compound. Its molecular formula is C6H14N2O and its molecular weight is 130.19 g/mol. The purity is usually 95%.
1-(2-Hydroxyethyl)piperazine is a chemical solvent that is used for the absorption of amines and other compounds. It has been shown to have a high affinity for acidic substances, which may be due to its ability to form hydrogen bonds with them. 1-(2-Hydroxyethyl)piperazine is also used in sample preparation for the analysis of amines and other compounds in fruit extracts. The solubility of 1-(2-Hydroxyethyl)piperazine depends on the experimental conditions, including pH, temperature, and pressure. FT-IR spectroscopy has been used to measure the vibrational modes of 1-(2-Hydroxyethyl)piperazine molecules. The IR spectrum revealed that this compound contains a hydroxyl group and two fatty acid chains with one or more hydroxyl groups at their terminal end. The nmr spectrum showed that 1-(2-Hydroxyethyl)piperazine contains an NH proton as well as, Formula: C6H14N2O
Referemce:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics