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Fakultas Teknologi Industri (FTI) Institut Sains & Teknologi AKPRIND Yogyakarta melingkupi pendidikan Program Sarjana (S1) dan diploma 3 (D3) bertujuan mengembangkan, menyebarluaskan ilmu pengetahuan …

Rhenium and Ru cuts were further purified using a smaller version of the primary anion column that was made using disposable transfer pipettes and 250 μl of AG1X8 100–200 mesh resin. The Re-Ru, Pt-Ir, and Pd cuts were then evaporated to dryness and redissolved in a small amount of aqua regia to reduce resinderived

1. Introduction In recent years several overview articles and reviews concerning the metal rhenium and NHCs – including their applications in catalysis and radiochemistry – as well as group 7 metal–NHC complexes have been published. 1 The profound interest in this research area is due to the fact that rhenium is cheaper than most of the noble metals …

Dalam menyelenggarakan pendidikan, Institut Sains & Teknologi AKPRIND Yogyakarta menerapakan sistem penjaminan mutu serta standar yang telah ditetapkan oleh pemerintah. Saat ini seluruh program studi yang ada di IST AKPRIND telah terakreditasi oleh Badan Akreditasi Nasional Perguruan Tinggi (BAN-PT).

Introduction. A number of well documented events where radiological sources have been discovered outside of the regulatory system have helped to substantiate the belief that radioactive materials are open to being exploited for malicious intent [1–5].Being able to distinguish between different material production routes and …

A series of monometallic platinum and bimetallic platinum-rhenium catalysts supported on mesoporous carbon Sibunit, which is a type of mesoporous, microcryst. carbon, were …

Institute Sains & Tecnology AKPRIND Indonesian Higher Education. IST AKPRIND | 330 followers on LinkedIn. Institute Sains & Tecnology AKPRIND Indonesian Higher Education ... PT Eureka Bookhouse ...

Rhenium, a silver, lustrous metal, has one of the highest melting points of all elements, with only tungsten and platinum being higher. Trace amounts of the element rhenium were discovered spectroscopically in platinum ores in the minerals columbite, gadolinite, molybdenite,and in platinum ores by the German chemists I. Tacke-Noddack, W ...

Rhenium Metal Market Top Manufacturers, 13/03/2018· The global rhenium metal market is expected to display a higher growth in forthcoming period Rhenium is a mineral ore coupled with molybdenum and otherEagle Alloys is a leading supplier for Rhenium metal Rhenium alloys We supply pure rhenium, molybdenum rhenium and tungsten rhenium …

Experimental results suggest that the rhenium presence and its amount are two key factors for the appearance and the extent of TRS breaking in Re-based …

Kinetics of dehydrogenation of methylcyclohexane over a platinum-rhenium-alumina catalyst in the presence of added hydrogen. K. Jothimurugesan ... Parameter estimation in the kinetic model of methylcyclohexane dehydrogenation on a Pt—Al2O3 catalyst by sequential experiment design. The Chemical Engineering Journal 1989, 42 (3 ...

The process was so complicated and the cost so high that production was discontinued until early 1950 when tungsten-rhenium and molybdenum-rhenium alloys were prepared. These alloys found important applications in industry that resulted in a great demand for the rhenium produced from the molybdenite fraction of porphyry copper ores.

As seen on the previous sections, rhenium, in the form of ReO x, is often used as a dopant for other noble metals that are more commonly known for dissociating H 2, such as Au, Pd, Pt, Ir or Rh. 39, …

The relationship between superconductivity and the film preparation conditions, i.e., the thickness and annealing process, in electrodeposited rhenium (Re) films is studied in order to understand the effect of grain size and impurities on the film's superconducting transition temperature, T c.A water-in-salt electrolyte was used to …

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The stabilizing effect of Re on atomically dispersed Pt is contributed to the alloying effect of Pt atom with rhenium inside the pore of the (upbeta ) -zeolite. The …

Rhenium is a metal with one of the highest melting points of all the elements, exceeded by only tungsten and carbon. The general thermodynamic properties of rhenium are summarized in Table 4.1.For the molar heat capacity c p = f(T, K), J mol −1 K −1, the following relationship is recommended for the range of temperatures from 298 to 2500 K []

1. A catalytic system comprising: a. one or more supports having a catalyst combination of one of the following: i. platinum metal (Pt) and ruthenium metal (Ru); ii. platinum metal (Pt), rhenium metal (Re), and ruthenium metal (Ru); iii. platinum metal (Pt) and rhenium metal (Re); or iv. Rhenium metal (Re) and ruthenium metal (Ru). 2. The …

Phase relationships in the Al–Re binary system have been thermodynamically reassessed by using the CALPHAD technique to take into account the most recent experimental data in the Al-rich part. A new version of the Al–Re phase diagram considering the congruent melting of the Al11Re4 as well as the modified temperatures and nature of …

Rhenium was the lower one and indeed it was the last stable, non-radioactive, naturally-occurring element to be discovered. In 1905, Masataka Ogawa found it in the mineral thorianite from Sri Lanka. He realised from lines in its atomic spectrum that it contained an unknown element. He wrongly thought it was the one directly below manganese and ...

Abstract The effect of rhenium concentration on the activity and stability of Pt–Re/Al 2 O 3 catalysts used in naphtha reforming were studied by varying the …

Coupons of rhenium-to-CI03 flat plate joints, formed by explosive and diffusion bonding, were evaluated in a series of shear tests. Shear testing was conducted on as-received, thermally-cyc1ed (100 cycles, from 21 to 1100 'c), and thermally-aged (3 and 6 hrs at 1100 'c) jOint coupons. Shear tests were also conducted on joint coupons with rhenium

Interactive periodic table showing names, electrons, and oxidation states. Visualize trends, 3D orbitals, isotopes, and mix compounds. Fully descriptive writeups.

On the other hand, there is unidirectional causality from Bitcoin to rhenium. Accordingly, increases in Bitcoin price are cause of decreases in rhenium price. When the asymmetric causality test results evaluated together, it may be said that to construct a portfolio from Bitcoin, osmium, rhenium and ruthenium will provide benefit to the investors.

Rhenium is a chemical element; it has symbol Re and atomic number 75. It is a silvery-gray, heavy, third-row transition metal in group 7 of the periodic table. ... Rhenium's role in Pt/Re ...

2.1. Mononuclear Complexes. The overwhelming majority of rhenium carbonyl complexes tested in the last seven years are those of the fac-[Re(CO) 3] + core. A review of the literature revealed that the most active species (in vitro IC 50 values ≤ 5 μM) are those bound to a diimine bidentate ligand in the form of derivatized 2,2'-bipyridine …

Platinum (Pt) Rhenium (Re) ... Platinum (Pt) Silicon (Si) Silcon Dioxide (SiO 2) Silver (Ag) Tatalum (Ta) Titanium (Ti) Titanium Dioxide (TiO 2) Tungsten (W) Parylene Thermal Evaporator. The Specialty Coating Systems is a dedicated parylene evaporator that deposits a totally conformal film. Parylene is a chemically inert polymer that has many ...

After a historic excursus the basic properties of rhenium are summarized, followed by selected classes of its compounds (halides and oxyhalides, oxides, …

In 1869, Dmitri Ivanovich Mendeleev (1834–1907) predicted the existence of two yet-undiscovered elements of the Periodic Table. He named the analogs of manganese (group VII) eka-mangenese and dvi-manganese.Nowadays, these elements are known as technetium (atomic number Z = 43) and rhenium (Z = 75).. From 1904 to 1906, the …

The first potential sweep of the platinized Pt electrode was determined in 0.5 M H 2 SO 4 solution (dotted line in Fig. 3), and then 0.1 g Re 2 O 7 was introduced into the main compartment of the cell and rhenium deposition was carried out for 5 min galvanostatic polarization with 0.05 mA, starting from 0.6 V. During this time of …

Program Studi Sarjana (S1) Teknik Industri IST AKPRIND mampu mepertahankan status akreditasinya setelah menerima SK dari Badan Akreditasi Nasional Perguruan Tinggi (BAN-PT) beberapa waktu yang lalu. Dengan demikian Pregram Studi SI Teknik Industri tetap pada peringkat B berdasarkan pada keputusan BAN PT tersebut. …

Abstract: Experimental material was the waste platinum-rhenium catalyst; the kinetics of rhenium in PT rhenium catalyst failed by pressure oxygen leaching was studied. The effects of leaching pressure, temperature, sulfuric acid acidity, stirring speed and particle size on the kinetics of rhenium leaching were investigated in this paper.

Coupons of rhenium-to-CI03 flat plate joints, formed by explosive and diffusion bonding, were evaluated in a series of shear tests. Shear testing was conducted on as-received, …

Rhenium (Re) and osmium (Os) are both members of the sixth period of the periodic table of elements. While Re has chemical properties similar to molybdenum (Mo), Os is one of the six platinum-group elements (PGEs). Both Re and Os are strongly siderophile and present in minute quantities in terrestrial rocks; their concentrations are extremely low in igneous …

While rhenium has proven to be an ideal material in fast-cycling high-temperature applications such as rocket nozzles, its prohibitive cost limits its continued use and motivates a search for viable cost-effective substitutes. We show that a simple design principle that trades off average valence electron count and cost considerations proves …

Abstract. The inclusion of Re in Pt-Re-Al 2 O 3 reforming catalysts to improve the lifetime is known, but how rhenium functions and how it is disposed in the catalyst remain unclear. …

Effect of Re loading on the catalytic properties of Pt–Re/Al 2 O 3. Rhenium in Pt–Re/Al 2 O 3 catalyst is known to exist in two types of active sites, namely, (1) Pt–Re ensembles and (2) support (Al 2 O 3) interacted rhenium [13]. The strong interaction between rhenium and support is expected to cause decrease in reducibility of rhenium ...

Rhenium compounds are generally far more kinetically inert than manganese compounds. This problem has been solved by using Re II complexes, which have 17 valence electrons rather than the usual 18 valence electrons of most CORMs. A series of compounds of general formula, cis–trans-[Re II (CO) 2 Br 2 L 2], 52, L 2 = mono- or bi-dentate N ligand, …