Frilund Christian, Kotilainen Minna, Barros Lorenzo José, Lintunen Pertti, Kaunisto Kimmo
VTT Technical Research Centre of Finland Ltd., P.O. Box 1000, FI-02044 VTT Finland.
Arcelor-Mittal Global R&D, voie Romaine, Maizières lès Metz F-57280, France.
Energy Fuels. 2022 Apr 7;36(7):3695-3703. doi: 10.1021/acs.energyfuels.1c04235. Epub 2022 Mar 17.
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 HS to form stable sulfides. Hence, the valorization potential of EAFD as an adsorbent material for syngas HS removal was investigated. EAFD from European steel plants was characterized and tested in dynamic HS 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 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 ZnFeO 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. The results indicate that sufficiently high-zinc-content EAFD could serve as a viable sulfur capture material.
电弧炉粉尘（EAFD）是钢铁制造过程中产生的大量副产品，目前其增值应用有限。EAFD含有金属氧化物，这些金属氧化物可与H₂S反应形成稳定的硫化物。因此，研究了EAFD作为合成气中H₂S吸附剂材料的增值潜力。对欧洲钢铁厂的EAFD进行了表征，并在动态H₂S穿透试验中进行了测试，并与一种商业氧化锌基吸附剂进行了对比。为此，首先通过简单的研磨和造粒步骤将EAFD加工成吸附剂。EAFD样品在400℃和17000 h的空速下表现出硫捕获能力，这与样品研磨时间和锌浓度相关。经证实，只有锌参与了硫捕获。然而，发现ZnO和ZnFeO中的锌在硫化过程中均具有活性。在较高温度（500和600℃）下，EAFD样品的性能大幅提高，甚至超过了参考氧化锌的性能。高锌（质量分数48%）的EAFD-B样品在500℃下表现出最高的测试性能，硫捕获能力为234 mg/g。结果表明，锌含量足够高的EAFD可作为一种可行的硫捕获材料。
