Brazilian Journal of Chemical Engineering ( IF 1.2 ) Pub Date : 2021-07-06 , DOI: 10.1007/s43153-021-00129-y M. Chomiak 1 , J. Trawczyński 1 , M. Zawadzki 2
Zn–Ti–Co(Ni) sorbents for H2S removal from model hot coal were prepared and characterized. Effects of cobalt (Co) and nickel (Ni) on the sorbents texture, structure, H2S sorption capacity and regeneration properties were determined. TiO2 formed mixed metal oxides with CoO and NiO in the fresh sorbents, while TiO2 and nanocrystalline sulfides of Zn, Co, Ni were found in sulphided ones. The oxidative regeneration of sulphided sorbents re-formed mixed oxides. Sorption capacity of studied materials increased along with an increase of the amount of added Co (Ni) and also with the number of work cycles. Co-doped Zn–Ti materials adsorbed up to 244% more sulfur than these of Zn–Ti, while Ni-doped materials adsorbed ca. twice more H2S than the corresponding Co-doped sorbents. The addition of Co (Ni) decreased the temperature of ZnS oxidation. The catalytic effect of the Co (Ni) oxides on the oxidation of ZnS was suggested.
中文翻译:
钴(镍)氧化物对模型煤气高温脱硫锌钛吸附剂性能的影响
制备并表征了用于从模型热煤中去除H 2 S 的Zn-Ti-Co(Ni) 吸附剂。确定了钴 (Co) 和镍 (Ni) 对吸附剂质地、结构、H 2 S 吸附能力和再生性能的影响。TiO 2与新鲜吸附剂中的 CoO 和 NiO 形成混合金属氧化物,而硫化物中发现TiO 2和纳米晶硫化物 Zn、Co、Ni。硫化吸附剂的氧化再生重新形成混合氧化物。所研究材料的吸附能力随着 Co (Ni) 添加量的增加以及工作循环次数的增加而增加。共掺杂的 Zn-Ti 材料吸附的硫比 Zn-Ti 多 244%,而 Ni 掺杂材料吸附的硫大约为 244%。两倍多 H2 S 比相应的 Co 掺杂吸附剂。Co(Ni)的加入降低了ZnS氧化的温度。提出了 Co (Ni) 氧化物对 ZnS 氧化的催化作用。