This study investigated the process and mechanism of synergistically assisted hydrogen production from tailings and coal slurry. We have identified the optimal tailings as lead-zinc tailings through experimentation with different tailings mixed with pulverized coal . Furthermore, we have analyzed the electrochemical properties of Fe 2+ and Fe 3+ at different concentration gradients in a hydrochloric acid environment and our results have confirmed that the presence of Fe 3+ in the simplified environment does not affect the electrochemical processes . to determine the respective roles and effects of the extract and residue of the lead-zinc tailings slurry with equal amounts of coal dust added to them, which has confirmed that it is the lead-zinc tailings extract that has the primary influence. In addition, the electrocatalysis of Fe 3+ in the presence of both lead-zinc tailings and coal results in a small increase in current density, and the improvement in current density due to direct and indirect oxidation of coal particles is also extremely limited. Based on our analysis, we have concluded that the increase in current density brought about by the synergistic hydrogen production from lead-zinc tailings-supported coal is mainly due to the different oxidation processes of Fe 2+ .
Zimeng Nie,Chen Li,Senlin Tian,Ping Ning,Dian Yang,Yingjie Li
Desulfurization by ore pulp has proved to be an attractive pathway, by which sulfur dioxide (SO 2 ) removal from fuel gas and mineral acid leaching can be realized simultaneously in hydrometallurgy. However, the weak reaction between alkalescent ore pulp and the weak acid SO 2 aqueous solution, and large mass transfer resistance caused by the heterogeneity of pulp seriously impeded their applications. Increasing the dispersion and surface tension of pulp by surfactants is an effective way, which has been rarely reported. Herein, the influence of the representative cationic, anionic and nonionic surfactants on desulfurization performance by ore pulp containing electrolytic manganese residue (EMR), phosphate ores (PO), and copper tailings (CT) were investigated systematically. Due to the high performance of anionic surfactant in enhancing the dispersion of ore pulp, reducing the surface tension of pulp, and increasing foaming, the desulfurization efficiency of EMR, PO, and CT was increased by 21.56 ± 3.25%, 23.13 ± 4.09%, and 20.54 ± 1.01%, respectively. However, the charge neutralization of cationic surfactant and the non-dissociation of nonionic surfactant made their promotion lower than the anionic one. Further, the co-ions and counter-ions in pulp affected the performance of surfactants in desulfurization. Besides, transition metal ions catalyzed the oxidation of SO 2 and promoted the formation of H 2 SO 4 .
危险品化学品经营许可证（带存储）