Nashed Omar, Partoon Behzad, Lal Bhajan, Sabil Khalik Mohamad, Yaqub Sana, Shariff Azmi Mohd
Department of Chemical Engineering, Faculty of Technical Engineering, Bright Star University, El-Brega 218645, Libya.
Department of Biological and Chemical Engineering, Aarhus University, Universitetsbyen 36, 8000 Aarhus, Denmark.
Materials (Basel). 2022 Dec 5;15(23):8670. doi: 10.3390/ma15238670.
Hydrate-based technology has yet to find its way to commercial applications due to several issues, including formation conditions and slow kinetics. Several solid particles were introduced to speed up hydrate formation. However, these solid compounds have given contradictory results. This study investigated the effect of high thermal conductive metallic nanofluids of silver (Ag) and copper (Cu) on CH and CO hydrates. The solid particles were suspended in a 0.03 wt% SDS aqueous solution, and the results were compared with the 0.03 wt% SDS and deionized water samples. A stirred tank batch reactor was used to conduct the thermodynamic and kinetic experiments. The thermodynamic study revealed that 0.1 wt% of solid particles do not shift the equilibrium curve significantly. The kinetic evaluation, including induction time, the initial rate of gas consumption, half-completion time, and semi-completion time, , gas uptake, and storage capacity, have been studied. The results show that the Ag and Cu promote CH hydrates while they inhibit or do not significantly influence the CO hydrates formation. A predictive correlation was introduced to get the apparent rate constant of hydrate formation in the presence of metal-based fluid at the concentrations range of 0.005-0.1 wt%.
基于水合物的技术由于包括形成条件和动力学缓慢在内的几个问题，尚未找到进入商业应用的途径。引入了几种固体颗粒以加速水合物的形成。然而，这些固体化合物给出了相互矛盾的结果。本研究调查了高导热性的银（Ag）和铜（Cu）金属纳米流体对CH和CO水合物的影响。将固体颗粒悬浮在0.03 wt%的SDS水溶液中，并将结果与0.03 wt%的SDS和去离子水样品进行比较。使用搅拌釜间歇反应器进行热力学和动力学实验。热力学研究表明，0.1 wt%的固体颗粒不会显著移动平衡曲线。已经研究了动力学评估，包括诱导时间、气体消耗的初始速率、半完成时间和半完成时间、气体吸收和储存容量。结果表明，Ag和Cu促进CH水合物的形成，而它们抑制或不显著影响CO水合物的形成。引入了一个预测相关性，以获得在0.005 - 0.1 wt%浓度范围内存在金属基流体时水合物形成的表观速率常数。
