Request PDF | Securing Platinum-Group Metals for Transport Low-Carbon Transition | Fuel cell technology is the key to transport low-carbon transition. ... Various leaching parameters, such as ...Web

In this study, we used experimental results from the laboratory to determine the selection and breakage function parameters for a typical platinum group metal (PGM) ore. Parameters of these functions can be used in the simulator to find the remaining characteristic parameters of the selection and breakage functions, which makes the …Web

The advantages of Additive Manufacturing for the processing of platinum group metals ... Major parameters to be considered were slice thickness, laser power, scanning speed, scanning order, hatch distance, field offset, border distance and platform material – in total more than ten essentially individual parameters. Fundamental issues are:Web

The process of modelling and estimating these parameters is explained in the following subsections. 2.2 The construction of cost-cumulative availability curves. The MCI parameter can be derived from the function of cumulative mineral production and difference in its production costs (Ponsioen et al. 2014). This requires the construction of …Web

Geochemical studies of the behavior of platinum group elements (PGE) and gold in natural processes are important for solving many fundamental and applied problems and require the accumulation of a large amount of analytical information on the concentrations of these elements in samples of complex composition at the ppb–ppm …Web

The platinum-group metals (PGMs)—osmium, iridium, ruthenium, rhodium, platinum, and palladium—are im-mensely important in numerous technologies, but the ... including input/output files, calculation parameters, ge-ometry of the structures, energies, and formation energies.Web

The platinum group metals (PGMs) comprise 6 elements, which are platinum, palladium, rhodium, ruthenium, iridium, and osmium. These metals have high melting points, high …Web

The behavior of platinum group metals (PGMs) during their recovery with smelting of spent automotive ceramic catalysts powder in the presence of metallic copper at elevated temperatures is studied ...Web

Geochemical studies of the behavior of platinum group elements ( PGE) and gold in natural processes are important for solving many fundamental and applied …Web

Platinum group metal (PGM)-free catalysts are promising low-cost materials for the oxygen reduction reaction in proton exchange membrane fuel cells (PEMFCs). ... In Table 1, we have listed some of the variables and parameters that have been investigated in recent years, reporting their impact on the performance at low current density (kinetic ...Web

The platinum group of metals (PGM) include six d-block metals from groups 8, 9, and. 10 as well as periods 5 and 6. ... are key parameters for catalyst performance [92].Web

Platinum-group-metal catalysts for proton exchange membrane fuel cells: From catalyst design to electrode structure optimization ... sites; and a number of additional nucleation and growth parameters (the limit from the adsorption step during the nucleation process) are essential growth parameters to be studied. As with the preferred …Web

In this study, six different three-way catalysts were tested based on the engine bench to investigate the effect of platinum group metal (PGM) loadings and ratios of the catalysts on the transient emission characteristics of a heavy-duty natural gas engine.From the results of this study, NOx are the most important emissions to be …Web

Platinum on the other hand shows a moderate decrease, starting from the highest MgO sample analysed, but then decreasing strongly from 1.2 wt.% MgO. The initial Pt decrease is attributed to precipitation of a platinum-group mineral (PGM), probably a Pt-Fe alloy, and the sharp decrease of both Pt and Pd at 1.2 wtWeb

Chimwani et al. [3] did some work on the UG2 ore in order to determine the milling parameters of this platinum group mineral ore that will result in the optimum production of a desired size class ...Web

PDF | Phytomining is suggested as a technology to obtain platinum group metals (PGMs) nanoparticles from plants grown on the mineralized soils or... | Find, read …Web

Platinum-Group Element. Platinum group elements such as Pd, Ru, and Rh are likely to form an intermetallic compound, (U,Pu)(Pd,Ru,Rh)3, in the irradiated nitride …Web

β: 90.000°. γ: 90.000°. You may view the structure of platinum: interactively (best, but the page will take longer to load) or. non-interactively. Platinum crystal structure image (ball and stick style). Platinum crystal structure image (space filling style). The closest Pt-Pt separation is 277.5 pm implying a platinum metallic radius of ...Web

The PGM residue is upgraded by a series of steps: (1) sulfur removal, (2) sulfation roasting at 450° to 525° C to convert the residual copper, nickel, and iron sulfides to sulfates, and (3) H2SO4 leaching to remove the soluble sulfates. The final PGM residue contains more than 80 pet of the palladium and platinum in the ore.Web

Platinum (Pt), palladium (Pd), Ruthenium and rhodium (Rh) (also referred to as platinum group metals (PGMs)) that are chemically and physically similar and these metals are released into the environment by anthropogenic activities such as road traffic and mining industries . 85% of the world`s PGMs production is in South Africa, and has 82% …Web

The extraction of platinum group metals (PGM)Platinum-Group Metals (PGM) contained in waste automobile catalyst monolithic honeycomb was investigated by a novel approach that combines a pyro ...Web

Modelling Parameters 13 6.1 Allocation 13 6.2. Electricity 16 6.3. Fuel Combustion 17 7. Third Party Verification 17 Glossary 19 Terminology 19 References 20 ... Mining of platinum group metals ore from open pits and underground, including the removal of overburden and waste rock; extraction of material from tailings ...Web

Ionic liquids (ILs) with amino moieties were designed and synthesized as extractants for the selective extraction of platinum group metal (PGM) ions into IL phases from mixed aqueous HCl solutions ...Web

Mineable platinum group metal (PGM) deposits are rare and found in relatively few areas of the world. At the same time, the use of PGM is predicted to expand in green technology and energy applications, and PGMs are consequently currently listed as European Union critical metals. Increased mineralogical complexity, lower grade ores, …Web

The platinum group metals (PGMs) comprise 6 elements, which are platinum, palladium, rhodium, ruthenium, iridium, and osmium. These metals have high melting points, high heat resistance, high corrosion resistances, and unique catalytic properties. Owing to these properties, PGMs are being used widely in many industrial fields, most notably as ...Web

Abstract. In the last decades, a worldwide investment in the recovery or substitution of platinum group metals (PGMs) has been financed. PGMs have been classified as critical raw materials (CRMs), thus a circular economy model should be implemented for their effective recovery. PGM recovery from primary ores is expensive, …Web

Geochemical assessment of platinum group metals for phytomining REM, Int. Eng. J., Ouro Preto, 73(1), 85-91, jan. mar. | 2020 Figure 1 - Mic rography of Ba ck-scatte red Elec trons show ing: Pt ...Web

Figure 1. The six Platinum Group Elements (PGEs). These can be further sub-divided into the Iridium-Platinum Group Elements (IPGEs: iridium, osmium and ruthenium), and the …Web

Accurate separation and efficient recovery of platinum group metals (PGMs, mainly Ru, Rh and Pd) from high level liquid waste (HLLW) is a good choice for clean …Web

The recovery of platinum group elements (PGE (platinum group element coating); Pd, Pt, and Rh) from used catalytic converters, using low energy and fewer chemicals, was developed using potassium bisulfate fusion pretreatment, and subsequently leached using hydrochloric acid. ... Optimization on the fusion and leaching parameter …Web

The recovery of platinum group elements (PGE (platinum group element coating); Pd, Pt, and Rh) from used catalytic converters, using low energy and fewer chemicals, was developed using potassium ...Web

Figure 1. The six Platinum Group Elements (PGEs). These can be further sub-divided into the Iridium-Platinum Group Elements (IPGEs: iridium, osmium and ruthenium), and the Palladium-Platinum Group Elements (PPGEs: rhodium, palladium and platinum). Since 1979, the automotive industry has used PGEs Table 1. Instrument and method parameters.Web

PGEs, also called platinum group metals (PGMs) in the international scientific literature, encompass such metals as platinum (Pt), palladium (Pd), rhodium …Web

A highly significant feature of the chemistry of the elements at the end of the three Transition Series of the Periodic Table is the close similarity that exists between the six elements with partially occupied 4d and 5d orbitals, that is, the group known as the "platinum metals", and the marked difference between them and the three elements which have only 3d …Web

This study examined a method for determination of rhodium (Rh), palladium (Pd) and platinum (Pt) in particulate matter using standard solutions, model samples and certified reference materials (NIST 1648a and ERM CZ120). The method was based on microwave digestion followed by inductively coupled plasma mass spectrometry (ICP …Web

The nature and distribution of platinum-group metal deposits in the world indicate that South Africa will remain the prime supplier of platinum and the USSR the prime supplier of palladium. ... Six series of tests were made to investigate the following parameters; (1) conditioning time with MBT and sulfuric acid added simultaneously to …Web

The input to the environment of platinum group elements (e.g., Pt, Pd, Rh) associated with catalytic converters is becoming of increasing interest (Cinti et al., 2002; Dubiella-Jackowska and Namie ...Web

The purpose of this study was to determine the concentration of platinum group metals (PGMs) emitted with cement dust on a dust suppressed roadway next to a cement factory in Waterberg, South Africa. The concentrations of PGMs were determined using inductively coupled optical emission spectrometry.