How to Improve the Efficiency of Kinetic Hydrate Inhibitors Based on Nanofibrillar Cellulose?

IF 0.6 4区 工程技术 Q4 ENERGY & FUELS
Yinghua Gong, T. B. Tulegenov, A. P. Semenov, V. A. Vinokurov, Tianduo Li, A. S. Stoporev
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Abstract

This research discovered that carboxylated cellulose nanofibrils (CNF) with cations of various structures can significantly reduce the number of nucleation sites for methane hydrate formation when compared to distilled water. The electrokinetic potential of CNF in water slightly affects the concentration of hydrate crystallization centers, but it does alter the work of their formation. The energy barrier increases as the absolute value of the electrokinetic potential of nanoparticles decreases. The study of the effect of various CNF salts on the kinetics of methane hydrate formation expands our understanding of the inhibition mechanism of hydrate formation. It’s assumed that a significant negative charge prevents the adsorption of like-charged hydrate nucleation centers on CNF. A decrease in the absolute value of zeta potential of CNF due to a change in cation facilitates this process. As a result, nuclei sorbed on colloidal CNF particles are stabilized on the surface, complicating their coalescence and crystal growth. The design of cellulose-based nanoparticles with varying zeta potential will allow the development of a colloid theory for controlling the formation of gas hydrates.

Abstract Image

如何提高基于纳米纤维素的动力学水合物抑制剂的效率?
这项研究发现,与蒸馏水相比,含有不同结构阳离子的羧化纤维素纳米纤维(CNF)可显著减少甲烷水合物形成的成核点数量。CNF 在水中的电动势会轻微影响水合物结晶中心的浓度,但会改变其形成的功。随着纳米粒子电动势绝对值的减小,能障也随之增大。研究各种 CNF 盐对甲烷水合物形成动力学的影响,拓展了我们对水合物形成抑制机制的认识。据推测,明显的负电荷会阻止带类似电荷的水合物成核中心吸附在 CNF 上。由于阳离子的变化,CNF zeta 电位绝对值的降低促进了这一过程。因此,吸附在胶体 CNF 颗粒上的晶核会稳定在表面,使其凝聚和晶体生长变得复杂。设计具有不同 zeta 电位的纤维素基纳米粒子将有助于发展胶体理论,控制气体水合物的形成。
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来源期刊
Chemistry and Technology of Fuels and Oils
Chemistry and Technology of Fuels and Oils 工程技术-工程:化工
CiteScore
0.90
自引率
16.70%
发文量
119
审稿时长
1.0 months
期刊介绍: Chemistry and Technology of Fuels and Oils publishes reports on improvements in the processing of petroleum and natural gas and cracking and refining techniques for the production of high-quality fuels, oils, greases, specialty fluids, additives and synthetics. The journal includes timely articles on the demulsification, desalting, and desulfurizing of crude oil; new flow plans for refineries; platforming, isomerization, catalytic reforming, and alkylation processes for obtaining aromatic hydrocarbons and high-octane gasoline; methods of producing ethylene, acetylene, benzene, acids, alcohols, esters, and other compounds from petroleum, as well as hydrogen from natural gas and liquid products.
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