Ammonia-assisted Cu dispersion in NaY zeolite: Enhanced H2S removal and regeneration insights

IF 7.4 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering Pub Date : 2025-05-31 DOI:10.1016/j.jece.2025.117366

Yongjin Wang , Junjie Liao , Xiaoxia Zhang , Weiren Bao , Liping Chang

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引用次数: 0

Abstract

Ammonia-assisted copper dispersion offers a promising strategy to enhance the performance of zeolite-based sorbents for hydrogen sulfide (H₂S) removal under challenging industrial conditions. In this study, copper-exchanged NaY zeolite sorbents (CuAY) were synthesized via an ammonia-assisted ion exchange method and evaluated for low-temperature H₂S adsorption in humid blast furnace gas (BFG). The formation of [Cu(NH₃)₄]²⁺ complexes facilitated uniform copper dispersion and prevented agglomeration, thereby preserving the zeolite’s microporous structure. The optimized CuAY sorbent achieved a breakthrough sulfur capacity of 3.11 g S/100 g at 60 °C with 5 vol% H₂O, exceeding that of conventional CuY by 60 %. Moderate humidity was found to enhance H₂S uptake, while excessive moisture led to pore blockage. Regeneration studies confirmed good stability over multiple cycles. These findings highlight the potential of ammonia-assisted CuAY sorbents as efficient and regenerable materials for environmental desulfurization. Future research will focus on improving long-term regeneration performance and scaling up this technology for industrial applications.

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氨辅助Cu在NaY沸石中的分散：增强H2S去除和再生的见解

在具有挑战性的工业条件下，氨辅助铜分散体是一种很有前途的策略，可以提高沸石基吸附剂去除硫化氢（H2S）的性能。本研究采用氨辅助离子交换法合成了铜交换型NaY沸石吸附剂（CuAY），并对其在湿高炉气（BFG）中的低温H2S吸附性能进行了评价。[Cu(NH3)4]2+配合物的形成促进了铜的均匀分散，防止了团聚，从而保持了沸石的微孔结构。优化后的CuAY吸附剂在60℃、5 vol% H2O条件下的硫容达到了3.11 g S/100 g，比常规CuY的硫容提高了60 %。适度的湿度可以促进H2S的吸收，而过度的湿度会导致孔隙堵塞。再生研究证实在多个循环中具有良好的稳定性。这些发现突出了氨辅助CuAY吸附剂作为高效可再生环境脱硫材料的潜力。未来的研究将集中在提高长期再生性能和扩大该技术的工业应用上。

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来源期刊

Journal of Environmental Chemical Engineering Environmental Science-Pollution

CiteScore

11.40

自引率

6.50%

发文量

2017

审稿时长

27 days

期刊介绍： The Journal of Environmental Chemical Engineering (JECE) serves as a platform for the dissemination of original and innovative research focusing on the advancement of environmentally-friendly, sustainable technologies. JECE emphasizes the transition towards a carbon-neutral circular economy and a self-sufficient bio-based economy. Topics covered include soil, water, wastewater, and air decontamination; pollution monitoring, prevention, and control; advanced analytics, sensors, impact and risk assessment methodologies in environmental chemical engineering; resource recovery (water, nutrients, materials, energy); industrial ecology; valorization of waste streams; waste management (including e-waste); climate-water-energy-food nexus; novel materials for environmental, chemical, and energy applications; sustainability and environmental safety; water digitalization, water data science, and machine learning; process integration and intensification; recent developments in green chemistry for synthesis, catalysis, and energy; and original research on contaminants of emerging concern, persistent chemicals, and priority substances, including microplastics, nanoplastics, nanomaterials, micropollutants, antimicrobial resistance genes, and emerging pathogens (viruses, bacteria, parasites) of environmental significance.