Mean induction time and isothermal kinetic analysis of methane hydrate formation in water and imidazolium based ionic liquid solutions

被引：47

作者：

Nashed, Omar ^{[1
]}

Sabil, Khalik M. ^{[2
]}

Ismail, Lukman ^{[3
]}

Japper-Jaafar, Azuraien ^{[4
]}

Lal, Bhajan ^{[1
]}

机构：

[1] Univ Teknol PETRONAS, Chem Engn Dept, Bandar Seri Iskandar 32610, Perak Darul Rid, Malaysia

[2] Heriot Watt Univ Malaysia, Sch Energy Geosci Infrastruct & Soc, Inst Petr Engn, 1 Jalan Venna P5-2,Precinct 5, Putrajaya 62200, Malaysia

[3] Univ Malaysia Kelantan, Fac Agrobased Ind, Jeli 17600, Kelantan, Malaysia

[4] Univ Teknol PETRONAS, Mech Engn Dept, Bandar Seri Iskandar 32610, Perak Darul Rid, Malaysia

来源：

JOURNAL OF CHEMICAL THERMODYNAMICS | 2018年 / 117卷

关键词：

Kinetic inhibitors; Methane hydrate; Ionic liquid; Induction time; Avrami model; DUAL FUNCTION INHIBITORS; CRYSTALLIZATION KINETICS; CLATHRATE HYDRATE; CRYSTAL-GROWTH; PHASE-CHANGE; GAS; NUCLEATION; HALIDE; DSC;

D O I：

10.1016/j.jct.2017.09.015

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In this work, the performance of nine ionic liquids (ILs) as kinetic inhibitors for methane gas hydrates is investigated employing a high pressure micro differential scanning calorimeter (HPmDSC). Aqueous IL solutions of 0.01 mass fraction, as well as poly vinyl pyrrolidone (PVP), are prepared and the induction time of methane hydrate formation in these solutions is measured at 7.1 MPa and 258.15 K. It is found that [BMIM][CF3SO3], [BMIM][CH3SO4], and [OH- EMIM][Br] can delay hydrate formation at this concentration. Their relative inhibition power (RIP) are higher than PVP. The other ILs exhibit shorter induction time when compare with the blank sample, which shows their promotional effect rather than inhibition effect. It is found that there is a strong correlation between molar mass of [BMIM](+) based ILs and induction time. An attempt to model the kinetic of methane hydrate formation in the presence of low dosage ILs has been carried out using Avrami model by utilizing isothermal hydrate crystallization data. The kinetic analysis shows the needle like the shape of the nuclei and the one dimensional crystal growth during the methane hydrate formation. The Avrami analysis also indicates that most of the crystallization process of methane hydrate is governed by the enclathration reaction and slightly leads by the diffusioncontrolled mechanism. (C) 2017 Elsevier Ltd.

引用

页码：147 / 154

页数：8