Hydrophobic Ni foam catalyst for nitrobenzene hydrogenation enhancement in micropacked bed reactors

AIChE Journal, Год журнала: 2025, Номер unknown

Опубликована: Апрель 1, 2025

Abstract Non‐modified Pd/PDA/Ni foam, hydrophobic modified F 9 ‐Pd/PDA/Ni and 17 foam catalysts are successfully prepared used for NB hydrogenation in micropacked bed reactors (μPBRs). The catalytic performance increases with the addition of water water–methanol mixed solvent. In solvent 50 v/v% water, can almost completely convert nitrobenzene (NB) a yield 95.9% at mild 45°C. As contact angle (87.5–141.5°), enhancement ratios conversion AN 28.9%–92.4% 31.4%–106.5%, respectively. space–time μPBRs reaches 1.873 kg·L −1 ·h ·g , which is 1–2 orders magnitude higher than that conventional reactors. kinetic model established system μPBRs. hydrophobicity significantly improves reaction rate hydrogenation, constant increased by 69.9%.

Язык: Английский

Superhydrophobic Coating Based on Nano-Silica Modification for Antifog Application of Partition Glass

Coatings, Год журнала: 2024, Номер 14(11), С. 1375 - 1375

Опубликована: Окт. 29, 2024

In this study, vinyl triethoxysilane (VTES), KH-560 and trimethylchlorosilane (TMCS) were used to modify the surface groups of commercially available nano-silica (SiO2, 50 nm), ethylene acetate copolymer (EVA) was as a film-forming agent. EVA/SiO2, EVA/V-SiO2, EVA/K-SiO2 EVA/T-SiO2 coatings prepared, respectively. The characterized by SEM, FTIR, TG contact angle. It found that when mass percentage SiO2 66 wt%, hydrophobicity performance coating could be significantly improved silica modification. Compared water angle (WCA) increased 24.0%, 14.4% 24.6%, FTIR results indicated VTES, TMCS effectively replace -OH on after hydrolysis, resulting in presence transport surface. certified had highest substitution rate (24.6%) for hydrolysis. Additionally, SEM T-SiO2 more easily dispersed EVA agent, leading uniform micro–nano rough structure, which aligned with Cassie–Wenzel model. durability test demonstrated maintained its hydrophobic properties even enduring 40,000 drops impact 200 g sand. Furthermore, it exhibited excellent resistance acid corrosion, along superior self-cleaning an anti-fog performance. also provided outstanding protection against high temperatures UV radiation outdoor applications.

Язык: Английский