Development of Recovery System for Extracting Silicon Carbide from Photovoltaic Industry Abrasive Slurry

2015 ◽  
Vol 656-657 ◽  
pp. 28-32 ◽  
Author(s):  
Sheng Fu Yang ◽  
Chang Sing Hwang ◽  
Zong Yang Jhuang Shie ◽  
Chun Huang Tsai ◽  
Chun Liang Chang ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Aqueous Media ◽  
Chemical Separation ◽  
Pilot Scale ◽  
Cutting Fluid ◽  
Separation Processes ◽  
Silicon Ingot ◽  
Recovery System ◽  
Magnetic Metal ◽  
Physical And Chemical

Silicon carbide (SiC) is widely employed as an abrasive material in aqueous media for sawing silicon ingot into individual wafers in photovoltaic industry. After a series of cutting, grinding and polishing operation, a mixture of substances (Cutting fluid, SiC, Si and small amount of magnetic metal) is produced as a form of slurry. The used SiC can be preferably recovered and reused for another application, rather than disposed of as waste. In this study, a pilot scale system (25 kg/h) is developed to extract SiC from photovoltaic industry abrasive slurry. The recovery system is composed of physical and chemical separation processes to remove silicon particles and magnetic materials which are dispersed in the slurry. X-ray diffraction analysis showed that purified powder is in the 6H-SiC structure and powder consists only of silicon carbide and has no residual silicon. It might be applied again in silicon ingot cutting or for other purposes which require this kind of ceramic material.

Recovery of silicon carbide and synthesis of silica materials from silicon ingot cutting fluid waste

2021 ◽  
Vol 254 ◽  
pp. 117556
Author(s):  
Mouna Hecini ◽  
Meftah Tablaoui ◽  
Salaheddine Aoudj ◽  
Baya Palahouane ◽  
Ouahiba Bouchelaghem ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Cutting Fluid ◽  
Silicon Ingot ◽  
Silica Materials

Pilot scale application of the Membrane Aromatic Recovery System (MARS) for recovery of phenol from resin production condensates

2005 ◽  
Vol 257 (1-2) ◽  
pp. 120-133 ◽  
Author(s):  
Frederico Castelo Ferreira ◽  
Ludmila Peeva ◽  
Andrew Boam ◽  
Shengfu Zhang ◽  
Andrew Livingston
Keyword(s):  
Pilot Scale ◽  
Recovery System

Reclamation of Abrasive Slurry to Obtain SiC Ceramic Material

2022 ◽  
Vol 905 ◽  
pp. 333-337
Author(s):  
Sheng Fu Yang ◽  
Chun Liang Chen ◽  
Kuang Li Chien ◽  
Chih Chao Liang ◽  
Hsien Ho Chuo
Keyword(s):  
Silicon Carbide ◽  
Chemical Separation ◽  
Distribution Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Sic Ceramic ◽  
Illegal Waste Disposal ◽  
Main Component ◽  
The Cost ◽  
Illegal Waste

In the period of silicon and silicon carbide wafer slicing process, the abrasive oil, silicon carbide (SiC), silicon and trace elements e.g., iron, zinc, copper, and nickel is generated as an oily mixture of insoluble matter. The SiC is the main component (>70%) in the abrasive slurry and the extraction of SiC from the slurry can eliminate the risk of illegal waste disposal and reduce the cost for the enterprises. In this study, a chemical separation process is applied to remove silicon particles and SiC can be extracted from the slurry mixtures. The X-ray diffraction analysis revealed that recycled material is moissanite with two crystalline polymorphs. The 3C and 6H X-ray powder pattern is observed and the cubic and hexagonal crystalline structure is revealed. The particle size distribution analysis showed that median value of purified SiC powder material is 9.8 μm.

Corrosion Behavior of Silicon Carbide in Aqueous Media Lubricated Sliding Applications

2011 ◽  
pp. 191-197
Author(s):  
O. Krummhauer ◽  
V. Presser ◽  
A. Kailer ◽  
K. G. Nickel ◽  
T. Hollstein
Keyword(s):  
Silicon Carbide ◽  
Corrosion Behavior ◽  
Aqueous Media ◽  
Lubricated Sliding

Microporous Ceramics Made by Silicon Carbide Whiskers

2007 ◽  
Vol 336-338 ◽  
pp. 1904-1905
Author(s):  
Chang Hong Dai ◽  
Ru Zhao ◽  
Li Shui ◽  
Bao Bao Zhang
Keyword(s):  
Silicon Carbide ◽  
Flexural Strength ◽  
Pore Size ◽  
Sintering Temperature ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Sintering Aids ◽  
Silicon Carbide Whiskers ◽  
Physical And Chemical ◽  
And Chemical Properties

A new method for preparing microporous ceramics by the silicon carbide whiskers was studied in this paper. The physical and chemical properties and the microstructure of the microporous ceramics were tested, while some influencing factors for the product, such as the amount of sintering aids and sintering temperature, were discussed. The results suggest that the apparent porosity of the microporous ceramics is 55.7-59.8% and the flexural strength is 127-176MPa. The pore distribution of the microporous ceramics is uniformity and the diameter of the pore ranges between 0.5μm and 7μm. The porosity and pore size of the microporous ceramic can be controlled by adjusting the sintering temperature and the amount of sintering aids.

scholarly journals Comparative Study of Green and Synthetic Polymers for Enhanced Oil Recovery

Polymers ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2429
Author(s):  
Nasiru Salahu Muhammed ◽  
Md. Bashirul Haq ◽  
Dhafer Al-Shehri ◽  
Mohammad Mizanur Rahaman ◽  
Alireza Keshavarz ◽  
...  
Keyword(s):  
Comparative Study ◽  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Pilot Scale ◽  
Limited Information ◽  
Polymer Flood ◽  
Hydrolyzed Polyacrylamide ◽  
Physical And Chemical ◽  
Inaccessible Pore Volume ◽  
Petrochemical Engineering

Several publications by authors in the field of petrochemical engineering have examined the use of chemically enhanced oil recovery (CEOR) technology, with a specific interest in polymer flooding. Most observations thus far in this field have been based on the application of certain chemicals and/or physical properties within this technique regarding the production of 50–60% trapped (residual) oil in a reservoir. However, there is limited information within the literature about the combined effects of this process on whole properties (physical and chemical). Accordingly, in this work, we present a clear distinction between the use of xanthan gum (XG) and hydrolyzed polyacrylamide (HPAM) as a polymer flood, serving as a background for future studies. XG and HPAM have been chosen for this study because of their wide acceptance in relation to EOR processes. To this degree, the combined effect of a polymer’s rheological properties, retention, inaccessible pore volume (PV), permeability reduction, polymer mobility, the effects of salinity and temperature, and costs are all investigated in this study. Further, the generic screening and design criteria for a polymer flood with emphasis on XG and HPAM are explained. Finally, a comparative study on the conditions for laboratory (experimental), pilot-scale, and field-scale application is presented.

scholarly journals The novel method to reduce the silica content in lignin recovered from black liquor originating from rice straw

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Nghi H. Do ◽  
Hieu H. Pham ◽  
Tan M. Le ◽  
Jeroen Lauwaert ◽  
Ludo Diels ◽  
...  
Keyword(s):  
Rice Straw ◽  
Black Liquor ◽  
Chemical Properties ◽  
Alkaline Treatment ◽  
Pilot Scale ◽  
Silica Content ◽  
Silica Removal ◽  
High Silica ◽  
Novel Method ◽  
Physical And Chemical

AbstractDifficulties in the production of lignin from rice straw because of high silica content in the recovered lignin reduce its recovery yield and applications as bio-fuel and aromatic chemicals. Therefore, the objective of this study is to develop a novel method to reduce the silica content in lignin from rice straw more effectively and selectively. The method is established by monitoring the precipitation behavior as well as the chemical structure of precipitate by single-stage acidification at different pH values of black liquor collected from the alkaline treatment of rice straw. The result illustrates the significant influence of pH on the physical and chemical properties of the precipitate and the supernatant. The simple two-step acidification of the black liquor at pilot-scale by sulfuric acid 20w/v% is applied to recover lignin at pH 9 and pH 3 and gives a percentage of silica removal as high as 94.38%. Following the developed process, the high-quality lignin could be produced from abundant rice straw at the industrial-scale.

Study on nano silicon carbide water-based cutting fluid in polysilicon cutting

2021 ◽  
Vol 123 ◽  
pp. 105512
Author(s):  
Chunyan Yao ◽  
Dongdong Chen ◽  
Kaixiang Xu ◽  
Zhongli Zheng ◽  
Qiangsheng Wang ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Cutting Fluid ◽  
Water Based ◽  
Nano Silicon

Microstructural analysis of W-SiCf/SiC composite

2015 ◽  
Vol 29 (06n07) ◽  
pp. 1540017
Author(s):  
Hanki Yoon ◽  
Jeongseok Oh ◽  
Gonho Kim ◽  
Hyunsu Kim ◽  
Heishichiro Takahashi ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Power Systems ◽  
Microstructural Analysis ◽  
Hot Press ◽  
Extreme High Temperature ◽  
Press Method ◽  
Shock Resistance ◽  
High Temperature Reactor ◽  
Sic Composites ◽  
Physical And Chemical

Continuous silicon carbide fiber-reinforced silicon carbide ( SiC f / SiC ) composites are promising structure candidates for future fusion power systems such as gas coolant fast channels, extreme high temperature reactor and fusion reactors, because of their intrinsic properties such as excellent mechanical properties, high thermal conductivity, good thermal-shock resistance as well as excellent physical and chemical stability in various environments under elevated temperature conditions. In this study, bonding of tungsten and SiC f / SiC was produced by hot-press method. Microstructure analyses were performed using SEM and TEM.

scholarly journals Practical Aspects of Electrochemical Corrosion Measurements During In Situ Analytical Transmission Electron Microscopy (TEM) of Austenitic Stainless Steel in Aqueous Media

2017 ◽  
Vol 23 (4) ◽  
pp. 741-750 ◽  
Author(s):  
Sibylle Schilling ◽  
Arne Janssen ◽  
Nestor J. Zaluzec ◽  
M. Grace Burke
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Aqueous Media ◽  
Electrochemical Corrosion ◽  
Electrochemical Reactions ◽  
Analytical Transmission Electron Microscopy ◽  
Transmission Electron ◽  
Physical And Chemical

AbstractThe capability to perform liquid in situ transmission electron microscopy (TEM) experiments provides an unprecedented opportunity to examine the real-time processes of physical and chemical/electrochemical reactions during the interaction between metal surfaces and liquid environments. This work describes the requisite steps to make the technique fully analytical, from sample preparation, through modifications of the electrodes, characterization of electrolytes, and finally to electrochemical corrosion experiments comparing in situ TEM to conventional bulk cell and microcell configurations.

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