Corrosion-Resistant Hydrophobic MFI-Type Zeolite-Coated Mesh for Continuous Oil–Water Separation,Industrial & Engineering Chemistry Research

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Corrosion-Resistant Hydrophobic MFI-Type Zeolite-Coated Mesh for Continuous Oil–Water Separation
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-02-13 , DOI: 10.1021/acs.iecr.9b05923
Yongwei Cai _{1,

2} , Qi Zhao ₂ , Xuejun Quan ₁ , Jiao Zhu ₁ , Chao Zhou ₁

Affiliation

Efficient separation of oil–water mixtures has become a critical challenge due to frequent oil-spill accidents and enormous release of oil-containing wastewater by households or catering services. Superhydrophobic coatings on metal meshes have been evidenced as the effective and energy-saving materials for oil–water separation. However, it is difficult to fabricate the separating coatings with long-term superhydrophobicity and the outstanding anticorrosion properties for practical application. In this study, we fabricated the hydrophobic Mobil five (MFI)-type zeolite coatings on the pristine stainless steel meshes via an in situ crystallization method and subsequently modified them with an environmentally safe hexadecyltrimethoxysilane compound. The as-prepared coating meshes showed good self-cleaning, antifouling, and anticorrosion properties. Furthermore, the coated meshes were capable of continuously and efficiently separating different kinds of oil–water mixtures under gravity-driven pressure and had more than 99.0% high separation efficiency. More important, the prepared hydrophobic MFI-coated meshes had equivalent separation performance compared to that of superhydrophobic coating meshes. Meanwhile, the hydrophobic MFI-coated meshes demonstrated excellent reusability performance and long-term stability. These as-prepared meshes thus have great potential for applications in separating oily wastewater from oil fields as well as recycling of waste oil from catering services.

中文翻译：

耐腐蚀疏水性MFI型分子筛沸石涂层，用于油水连续分离

由于频繁发生漏油事故以及家庭或餐饮服务部门大量释放含油废水，有效分离油水混合物已成为一项严峻的挑战。金属丝网上的超疏水涂层已被证明是用于油水分离的有效且节能的材料。然而，难以制造具有长期超疏水性和优异的防腐性能的分离涂层以用于实际应用。在这项研究中，我们通过原位结晶方法在原始不锈钢网上制备了疏水性Mobil五（MFI）型沸石涂层，随后用对环境安全的十六烷基三甲氧基硅烷化合物对其进行了改性。所制备的涂料网具有良好的自洁，防污和防腐性能。此外，带涂层的筛网能够在重力驱动的压力下连续有效地分离不同种类的油水混合物，并具有99.0％以上的高分离效率。更重要的是，与超疏水涂层网相比，制备的疏水MFI涂层网具有同等的分离性能。同时，疏水性MFI涂层网片表现出出色的可重复使用性能和长期稳定性。因此，这些准备好的筛网在将含油废水从油田中分离以及从餐饮服务中回收废油方面具有巨大的应用潜力。更重要的是，与超疏水涂层网相比，制备的疏水MFI涂层网具有同等的分离性能。同时，疏水性MFI涂层网片表现出出色的可重复使用性能和长期稳定性。因此，这些准备好的筛网在将含油废水从油田中分离以及从餐饮服务中回收废油方面具有巨大的应用潜力。更重要的是，与超疏水涂层网相比，制备的疏水MFI涂层网具有同等的分离性能。同时，疏水性MFI涂层网片表现出出色的可重复使用性能和长期稳定性。因此，这些准备好的筛网在将含油废水从油田中分离以及从餐饮服务中回收废油方面具有巨大的应用潜力。

更新日期：2020-02-14

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