Tetrahydrofuran Hydrate Crystal Growth Inhibitor Performance and Mechanism of Quaternary Ammonium and Phosphonium Salts
Tetrahydrofuran Hydrate Crystal Growth Inhibitor Performance and Mechanism of Quaternary Ammonium and Phosphonium Salts
复制标题
季铵盐、鏻盐的四氢呋喃水合物晶体生长抑制剂性能及机理
DOI：
10.1021/acs.cgd.0c00126
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发表时间：
2020
影响因子：
3.8
通讯作者：
Tenma Norio
中科院分区：
文献类型：
--
作者：
Muraoka Michihiro;Kelland Malcolm A.;Yamamoto Yoshitaka;Tenma Norio
为了深入了解水合物晶体生长抑制剂 (HCGI) 机制，我们研究了各种季铵离子液体盐 (QAIL) 和鏻盐，了解它们阻止结构 II (sII) 水合物晶体生长的能力。我们测试了聚乙烯吡咯烷酮 (PVP)、聚乙烯己内酰胺 (PVCap)、四丙基溴化铵 (TPrAB)、四丁基溴化铵 (TBAB)、四戊基溴化铵 (TPeAB)、四己基溴化铵 (THexAB) 和四丁基鏻 使用单向生长装置在四氢呋喃 (THF) sII 水合物系统中测定溴化物 (TBPB) 的浓度和生长速率依赖性。研究发现，TPrAB、TBAB 和 THexAB 的生长速率在低生长速率区域至关重要，这些添加剂在低生长速率区域的过冷度 ΔT 变为 0。相比之下，PVP、PVCap、TPeAB 和 TBPB 在 V= 0.04 μm s–1 的最低增长率下仍然有效。这些趋势可以通过 HCGI 晶体表面上的停留时间、τ 和晶体生长的持续时间来解释。
To gain insight into the hydrate crystal growth inhibitor (HCGIs) mechanism, we have studied various quaternary ammonium ionic liquid salts (QAILs) and phosphonium salts for their ability to prevent structure II (sII) hydrate crystal growth. We tested polyvinylpyrrolidone (PVP), polyvinylcaprolactam (PVCap), tetrapropylammonium bromide (TPrAB), tetrabutylammonium bromide (TBAB), tetrapentylammonium bromide (TPeAB), tetrahexylammonium bromide (THexAB), and tetrabutylphosphonium bromide (TBPB) in a tetrahydrofuran (THF) sII hydrate system using a unidirectional growth apparatus to determine the concentration and growth rate dependence. The growth rates of TPrAB, TBAB, and THexAB were found to be critical in the region of low growth rate, with the degree of supercooling ΔTbecoming 0 for these additives in the low-growth-rate region. In contrast, PVP, PVCap, TPeAB, and TBPB remained effective at the lowest growth rate ofV= 0.04 μm s–1. These trends can be explained by the residence time on the crystal surface of the HCGI, τ, and duration time of crystal growth.