scholarly journals Investigation on Deactivation Factors of a Pd/Al2O3 Catalyst in Selective Hydrogenation of Cyclopentadiene under the Operation of Bench Scale Reactor (Part 2) Catalyst Deactivation Mechanisms through Characterization of Spent Catalysts and Performance Test of Regenerated Spent Catalysts

2018 ◽  
Vol 61 (4) ◽  
pp. 227-238
Author(s):  
Hideaki Miki
Keyword(s):  
Selective Hydrogenation ◽  
Performance Test ◽  
Catalyst Deactivation ◽  
Bench Scale ◽  
Spent Catalysts ◽  
And Performance ◽  
Scale Reactor

Catalyst deactivation pattern along a residue hydrotreating bench-scale reactor

2014 ◽  
Vol 220-222 ◽  
pp. 153-158 ◽  
Author(s):  
Pablo Torres-Mancera ◽  
Patricia Rayo ◽  
Jorge Ancheyta ◽  
Gustavo Marroquín ◽  
Guillermo Centeno ◽  
...  
Keyword(s):  
Catalyst Deactivation ◽  
Bench Scale ◽  
Scale Reactor

Characterization of spent and regenerated catalysts recovered from a residue hydrotreating bench-scale reactor

Fuel ◽  
2015 ◽  
Vol 149 ◽  
pp. 143-148 ◽  
Author(s):  
Pablo Torres-Mancera ◽  
Patricia Rayo ◽  
Jorge Ancheyta ◽  
Gustavo Marroquín ◽  
Guillermo Centeno ◽  
...  
Keyword(s):  
Bench Scale ◽  
Scale Reactor

scholarly journals Fabrication and Characterization of Friction Stir-Processed Mg-Zn-Ca Biomaterials Strengthened with MgO Particles

2021 ◽  
Author(s):  
Zhen Liu ◽  
Yangchuan Cai ◽  
Jie Chen ◽  
Jian Han ◽  
Zhiyong Mao ◽  
...  
Keyword(s):  
Grain Refinement ◽  
Performance Test ◽  
Rotational Velocity ◽  
Casting Process ◽  
Test Methods ◽  
The Novel ◽  
Friction Stir ◽  
And Performance ◽  
Particle Strengthening

Abstract Magnesium alloy composites play an important role in biomaterials field. In this study, a novel Mg-Zn-Ca matrix composite was reinforced by adding 1.0 wt.% MgO nanoparticles via the high shear casting process. Hereafter, friction stir processing (FSP) was used to achieve a good dispersion of MgO particles and improve the mechanical properties of the composites. After the preparation of the novel composite materials, varied characterization and performance test methods have been selected for comparison. The results illustrate that through FSP, the corresponding microstructure and properties of as-cast MgO/Mg-Zn-Ca composites were significantly modified, and the best combination of the key parameters is 1200 rpm and 60 mm/min for rotational velocity and traveling speed, respectively. After the optimized FSP treatment, the grains size in FSP-processed composites were refined by 42%, to reach 1.04 μm. Due to the grain refinement and the redistribution of MgO particles, the hardness of the FSP-processed MgO/Mg-Zn-Ca composites were increased by 40%, to reach 101.2 HV. Further, it displayed excellent corrosion resistance as well as strength. Compared to the strengthening through grain refinement, the particle strengthening is more dominant based on the study. And meanwhile, the modified grains and added MgO particles are beneficial to the properties of the nugget zones.

Treatment of a Nickel-Copper Sulphide Concentrate Using Bioleaching

2013 ◽  
Vol 825 ◽  
pp. 464-467
Author(s):  
Mariekie Gericke ◽  
Stefan Robertson
Keyword(s):  
Residence Time ◽  
Process Parameters ◽  
Copper Sulphide ◽  
Bench Scale ◽  
Solids Concentration ◽  
Nickel Copper ◽  
Ultrafine Grinding ◽  
Moderate Thermophile ◽  
And Performance ◽  
Scale Reactor

This paper describes bioleach test work performed in continuously operated bench-scale reactor systems on a nickel-copper containing sulphide concentrate at 45 and 70°C, respectively. Optimisation of the process focused on determining the effects of process parameters such as residence time, grind size and feed solids concentration on the leach kinetics, metal extractions and performance of both the moderate thermophile and thermophile cultures. The results showed that nickel recoveries in excess of 96% could be achieved using a moderate grind size and leach temperatures, whereas ultrafine grinding and higher operating temperatures were required to achieve Cu extractions in excess of 93%.

Rancang Bangun Alat Olahan Minyak Kelapa

2016 ◽  
Vol 10 (1) ◽  
pp. 70-77
Author(s):  
Jantri Sirait ◽  
Sulharman Sulharman
Keyword(s):  
Electric Motor ◽  
Performance Test ◽  
Production Capacity ◽  
Coconut Oil ◽  
Heating Time ◽  
Design Tool ◽  
Coconut Milk ◽  
Heating Process ◽  
And Performance ◽  
Time Required

Has done design tool is a tool of refined coconut oil coconut grater, squeezer coconut milk and coconut oil heating, with the aim to streamline the time of making coconut oil and coconut oil increase production capacity. The research method consists of several stages, among others; image creation tool, procurement of materials research, cutting the material - the material framework of tools and performance test tools. The parameters observed during the performance test tools is time grated coconut, coconut milk bleeder capacity, the capacity of the boiler and the heating time of coconut oil. The design tool consists of three parts, namely a tool shaved coconut, coconut milk wringer and coconut milk heating devices. Materials used for the framework of such tools include iron UNP 6 meters long, 7.5 cm wide, 4 mm thick, while the motor uses an electric motor 0.25 HP 1430 rpm and to dampen the rotation electric motor rotation used gearbox with a ratio of round 1 : 60. the results of the design ie the time required for coconut menyerut average of 297 seconds, coconut milk wringer capacity of 5 kg of processes and using gauze pads to filter coconut pulp, as well as the heating process takes ± 2 hours with a capacity of 80 kg , The benefits of coconut oil refined tools are stripping time or split brief coconut average - average 7 seconds and coconut shell can be used as craft materials, processes extortion coconut milk quickly so the production capacity increased and the stirring process coconut oil mechanically.ABSTRAKTelah dilakukan rancang bangun alat olahan minyak kelapa yaitu alat pemarut kelapa, pemeras santan kelapa dan pemanas minyak kelapa, dengan tujuan untuk mengefisiensikan waktu pembuatan minyak kelapa serta meningkatkan kapasitas produksi minyak kelapa. Metode penelitian terdiri dari beberapa tahapan antara lain; pembuatan gambar alat, pengadaan bahan-bahan penelitian, pemotongan bahan - bahan rangka alat dan uji unjuk kerja alat. Parameter yang diamati pada saat uji unjuk kerja alat adalah waktu parut kelapa, kapasitas pemeras santan kelapa, kapasitas tungku pemanas serta waktu pemanasan minyak kelapa. Rancangan alat terdiri dari tiga bagian yaitu alat penyerut kelapa, alat pemeras santan kelapa dan alat pemanas santan kelapa. Bahan yang dipergunakan untuk rangka alat tersebut  yaitu besi UNP panjang 6 meter, lebar 7,5 cm, tebal 4 mm, sedangkan untuk motor penggerak menggunakan motor listrik 0,25 HP 1430 rpm dan untuk meredam putaran putaran motor listrik dipergunakan gearbox  dengan perbandingan putaran 1 : 60. Hasil dari rancangan tersebut yaitu waktu yang dibutuhkan untuk menyerut kelapa rata-rata 297 detik, kapasitas alat pemeras santan kelapa 5 kg sekali proses dan menggunakan kain kassa untuk menyaring ampas kelapa, serta Proses pemanasan membutuhkan waktu ± 2 jam dengan kapasitas 80 kg. Adapun keunggulan alat olahan minyak kelapa ini adalah waktu pengupasan atau belah kelapa singkat rata – rata 7 detik dan tempurung kelapa dapat digunakan sebagai bahan kerajinan, proses pemerasan santan kelapa cepat sehingga kapasitas produksi meningkat dan proses pengadukan minyak kelapa secara mekanis. Kata kunci : penyerut, pemeras, pemanas,minyak kelapa,olahan minyak kelapa.

scholarly journals Design and performance test of variable diameter threshing drum of combine harvester

2021 ◽  
Author(s):  
Zhan Su ◽  
Zhao Ding ◽  
Liquan Tian ◽  
Xue Lin ◽  
Zhiming Wang
Keyword(s):  
Performance Test ◽  
Variable Diameter ◽  
Combine Harvester ◽  
And Performance
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