Steel Manufacturing EAF Dust as a Potential Adsorbent for Hydrogen Sulfide Removal

Abstract

Electric arc furnace dust (EAFD) is a high-volume steel manufacturing byproduct with currently limited value-added applications. EAFD contains metal oxides that can react with H 2 S to form stable sulfides. Hence, the valorization potential of EAFD as an adsorbent material for syngas H 2 S removal was investigated. EAFD from European steel plants was characterized and tested in dynamic H 2 S breakthrough tests and benchmarked against a commercial ZnO-based adsorbent. For this, the EAFD was first processed into adsorbents by simple milling and granulation steps. The EAFD samples exhibited sulfur capture capacities at 400 °C and an SV of 17,000 h –1 that correlated with the sample milling times and Zn concentrations. It was verified that only zinc participated in sulfur capture. Yet, both ZnO and the zinc in ZnFe 2 O 4 were found to be active in sulfidation. At higher temperatures (500 and 600 °C), EAFD sample performance drastically improved and even exceeded the reference zinc oxide performance. The high-zinc (48% by mass) EAFD-B sample exhibited the highest tested performance at 500 °C, with a sulfur capture capacity of 234 mg g –1 . The results indicate that sufficiently high-zinc-content EAFD could serve as a viable sulfur capture material.

Recent developments on the removal of zinc from electric arc furnace dust by using microwave heating

“…The particle size distribution and microstructure of EAFD Table .1 (Halli et al 2017;Lozano-Lunar et al 2019;Laubertova et al 2020a;Ahmad et al 2022;Borda and Torres 2022;Chen et al 2022;Coleti et al 2022;Frilund et al 2022;Grudinsky et al 2022;Gómez-Marroquín et al 2022;He et al 2022;Zoraga et al 2022;Ordoñez et al 2022;Qiu et al 2023;Li et al 2023) presents a comprehensive overview of EAFD compositions from various recent studies conducted in different countries. As technology advances, the distinction between zinc content levels determined by the place of production becomes less clear.…”

Composite High-k Films Based on Polyethylene Filled with Electric Arc Furnace Dust and MWCNT with Permittivity Synergetic Effect

“…EAFD can be used in agriculture for soil deoxidation due to the content of oxides of alkali and alkaline earth metals [11]. Due to the relatively high content of zinc oxide, dust can be a low-cost and effective H 2 S adsorbent [12]. Additionally, it can be used as a filler to improve the mechanical properties of polymer composites, such as tensile strength and hardness similar to fly ash particles [13,14], as well as reducing flammability.…”

Pyrolysis Behavior of Pyrite under a CO–H2 Atmosphere

“…Gaseous sulfur emitted from industrial production processes from industries such as chemical, metallurgical, and power industries is one of the culprits that endanger the natural environment and human health. − Hence, environmental protection regulations for gaseous sulfide emissions from industrial production processes are becoming increasingly stringent all over the world. Blast furnace gas (BFG), as a combustible by-product of the ironmaking process, is an important secondary energy.…”