Critical Growth Rate of Hydrate Crystal Growth Inhibitors in the Low Growth Rate Region

Critical Growth Rate of Hydrate Crystal Growth Inhibitors in the Low Growth Rate Region
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水合物晶体生长抑制剂在低生长速率区域的临界生长速率

DOI:
10.1021/acs.cgd.1c00421
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发表时间:
2021
期刊:
Crystal Growth & Design
影响因子:
--
通讯作者:
Suzuki Kiyofumi
Suzuki Kiyofumi
中科院分区:
--
文献类型:
--
作者:
Muraoka Michihiro;Kelland Malcolm A.;Yamamoto Yoshitaka;Suzuki Kiyofumi

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我们测试了聚(N-乙烯基吡咯烷酮)(PVP)K-12、K-15、K-30、K-90、聚(N-乙烯基己内酰胺)(PVCap)、四戊基溴化铵(TPeAB)、四丁基溴化铵(TBPB)、聚丙烯酰基吡咯烷(PAP)、聚(N-异丙基甲基丙烯酰胺)(PNIPMAM)和超支化聚酯酰胺(PEA)作为水合物晶体生长抑制剂(HCGI)。我们使用四氢呋喃(THF)sII水合物系统,使用单向生长装置。HCGI浓度c = 0.5wt%,生长速率V为0.005 ~ 10 μm s-1。TPeAB、PVP K-12、K-15、TBPB和PEA的生长速率在过冷度Δ T接近0时的低生长速率区是临界的。然而,PVP K-30、K-90、PAP、PNIPMAM和PVCap在V = 0.005 μm s-1时仍然有效。这些结果增强了模型的说服力,即HCGI效应可以用HCGI在晶体表面的停留时间τ和增加界面曲率所需的时间间隔t * 来解释。此外,我们确定了THF水合物的阈值增长率,以检查HCGI对sII气体水合物的性能。因此,当0.005 ≤临界生长速率V * < 0.01 μm s-1时,HCGIs对sII型天然气水合物具有中等抑制作用。当V * < 0.005 μm s-1时,HCGIs对sII型天然气水合物有较强的抑制作用。
We tested poly(N-vinylpyrrolidone) (PVP) K-12, K-15, K-30, K-90, poly(N-vinylcaprolactam) (PVCap), tetrapentylammonium bromide (TPeAB), tetrabutylammonium bromide (TBPB), polyacryloylpyrrolidine (PAP), poly(N-isopropylmethacrylamide) (PNIPMAM), and hyperbranched polyesteramide (PEA) as hydrate crystal growth inhibitors (HCGIs). We used a tetrahydrofuran (THF) sII hydrate system using a unidirectional growth apparatus. The HCGI concentrationc= 0.5 wt % and the growth rateVranged from 0.005 to 10 μm s–1. The growth rates of TPeAB, PVP K-12, K-15, TBPB, and PEA were found to be critical in the region of a low growth rate with the degree of supercooling ΔTapproaching 0. However, PVP K-30, K-90, PAP, PNIPMAM, and PVCap remained effective atV= 0.005 μm s–1. These results enhance the persuasiveness for the model that the HCGI effect is explained by the residence time on the crystal surface of HCGI, τ, and time intervalt* required to increase the interface curvature. In addition, we determined the threshold growth rate of THF hydrate for examining HCGI performance on sII gas hydrate. Thus, when 0.005 ≤ critical growth rateV* < 0.01 μm s–1, the HCGIs are moderate inhibitors on sII gas hydrate. WhenV* < 0.005 μm s–1, the HCGIs are strong inhibitors on sII gas hydrate.
DOI: 10.1021/acs.cgd.0c00126
发表时间: 2020
影响因子: 3.8
作者:
Muraoka Michihiro;Kelland Malcolm A.;Yamamoto Yoshitaka;Tenma Norio
通讯作者: Tenma Norio
聚N-异丙烯酰胺与四丁基溴化鏻对甲烷水合物形成的协同效应研究
DOI: 10.1016/j.egypro.2019.01.585
发表时间: 2019
期刊: Energy Procedia
影响因子: --
作者:
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通讯作者: Ju Dong Lee