A solvation strategy for fabricating acid-base sites on metals/ZSM-5 towards dehydration of high-water-content methanol to dimethyl ether

Zedong Lv, Miao Yu, Songnan Li, Jiawei Zhang, Jingxiang Zhao and Qinghai Cai

Renewable Energy, 2024, vol. 231, issue C

Abstract: In the process of modified basic NaZSM-5 precursor by its impregnating in M(NO3)n (M = Al, Cu, Fe, Co, Ni, Cr, Mn, Zn) or SnCl4 acidic aqueous solutions, we shed light on the solvation effect of Mx+ cations on surface acid-base strength, and further on enhanced catalytic reactivity. The obtained results indicated that M(Sn, Fe, Cr)/NaZSM-5 prepared with pKa values of the metal salts <4 present high catalytic reactivity due to their stronger solvation prone to produce acid-base site balance on the surface. To further understand the influence of solvation, the catalytic performance of Sn/NaZSM-5 for methanol, particularly the water-containing methanol dehydration was examined, achieving high conversion and selectivity for high-water-content methanol dehydration. Meanwhile, the catalytic stability test of the catalyst was carried out and above 1000 h run lifetime was actualized without the catalyst surface composition and structure changed.

Keywords: Solvation; High-water-content methanol; Dehydration; Acid-base balance (search for similar items in EconPapers)
Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:231:y:2024:i:c:s0960148124010681

DOI: 10.1016/j.renene.2024.121000

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