Web7 jul. 2024 · Leaching process. In this study, we used spent hydrodesulfurization (HDS) catalyst (Mo/Co-Al 2 O 3) for the leaching process. The chemical composition of the spent HDS catalyst is presented in Table 1. Besides a high Mo content, the spent catalyst also contains impurities such as S, Si, and Fe. Web13 apr. 2024 · Characterisation of the used catalysts by TG and BET analyses confirmed a leaching of up to 14% of the ionic liquid in the SCILLs coated at 1 ML and 2 ML, with an increase in surface area noted. Furthermore, smaller particle sizes of the used catalysts showed that the metal–support interaction was re-established.
Fatty acids hydrogenation catalysts Johnson Matthey
Web16 nov. 2024 · After pretreatment, the PGMs from waste catalyst are leached directly or after pretreated by suitable acid and alkaline solution such as aqua regia, sulfuric acid (H 2 SO 4 ), hydrochloric acid (HCl), sodium chlorate (NaClO 3 ), sodium hydroxide (NaOH), and cyanide solution in the presence of oxygen, hydrogen peroxide, bromine, and chlorine, … Web24 mrt. 2024 · remove contaminant metals from spent catalysts [10–13]. Li et al. [14] reported that 30% V, 23.5–24.6% Fe and no Ni were extracted from the SFCC catalyst … scottish golfer outfit
Metals smelting-collection method for recycling of platinum …
WebThe preparation can be affected by the initial alloy composition, the quenching process, the leaching procedure, aging and by the addition of promoters. These processes may affect either or both the chemical and physical characteristics of the catalysts. Preparation procedures need to be adjusted for individual reactions if optimal performance ... WebAfter 10h leaching, about 99% of PGM was dissolved. In the case of automotive catalyst recycling, the presence of Pt, Pd, Rh and other supporting oxides makes the leaching … WebStandard grade fatty acid hydrogenation catalyst with high activity and excellent resistance to catalyst poisons and nickel leaching. PRICAT 9953. Lower-nickel fatty acids … presbyterian transplant services