Controllable wettability on Ni foam with PDA coatings and gas–liquid mass transfer enhancement in micropacked bed reactors

IF 4.1 2区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Science Pub Date : 2024-11-02 DOI:10.1016/j.ces.2024.120892

Hongda Zhang, Miao Pang, Weiyao Yang, Le Sang, Zhiping Zhao

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引用次数: 0

Abstract

A micro-nano coating with controllable wettability is constructed on Ni foam using the dipping coating method, incorporating organic polydopamine (PDA) and 1H,1H,2H,2H-perfluorodecyltriethoxysilane, and inorganic SiO₂ nanoparticles. PDA has the properties of controlling wettability, strong adhesion, and abundant grafting sites. The water contact angle (WCA) of modified Ni foam is controlled in the range of 0–151.5°. The stability measurement displays that modified Ni foam packings exhibit excellent acid and alkali resistance as well as mechanical stability to fluid erosion under microenvironment. Compared with non-modified (131.5°) and superhydrophilic (0°) Ni foam packings, the maximum ratios of mass transfer enhancement for the superhydrophobic (151.5°) Ni foam packing are 35.6 % and 160.2 %, respectively. Empirical correlations of the gas–liquid mass transfer coefficient and friction factor are established considering the effect of the WCA, and errors between predicted values and experimental values are within ± 15 % and ± 10 %, respectively.

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具有 PDA 涂层的泡沫镍的可控润湿性和微堆床反应器中的气液传质增效作用

利用浸渍涂层法，在泡沫镍上构建了一种具有可控润湿性的微纳米涂层，其中包含有机聚多巴胺（PDA）、1H,1H,2H,2H-全氟癸基三乙氧基硅烷和无机纳米二氧化硅颗粒。PDA 具有可控润湿性、强粘附性和丰富的接枝位点等特性。改性泡沫镍的水接触角（WCA）可控制在 0-151.5° 范围内。稳定性测量结果表明，改性泡沫镍填料具有优异的耐酸碱性和机械稳定性，能抵抗微环境下的流体侵蚀。与非改性（131.5°）和超亲水（0°）镍泡沫填料相比，超疏水（151.5°）镍泡沫填料的传质增强最大比率分别为 35.6 % 和 160.2 %。考虑到 WCA 的影响，建立了气液传质系数和摩擦因数的经验相关性，预测值和实验值之间的误差分别在 ± 15 % 和 ± 10 % 范围内。

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来源期刊

Chemical Engineering Science 工程技术-工程：化工

CiteScore

7.50

自引率

8.50%

发文量

1025

审稿时长

50 days

期刊介绍： Chemical engineering enables the transformation of natural resources and energy into useful products for society. It draws on and applies natural sciences, mathematics and economics, and has developed fundamental engineering science that underpins the discipline. Chemical Engineering Science (CES) has been publishing papers on the fundamentals of chemical engineering since 1951. CES is the platform where the most significant advances in the discipline have ever since been published. Chemical Engineering Science has accompanied and sustained chemical engineering through its development into the vibrant and broad scientific discipline it is today.