Browsing NTNU Open by Author "Hoseinpur Kermani, Arman"
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As, Sb, and Fe removal from industrial copper electrolyte by solvent displacement crystallization technique
Shabani, Alireza; Hoseinpur Kermani, Arman; Youzbashizadeh, Hossein; Vahdati Khaki, Jalil (Journal article; Peer reviewed, 2018)The presence of impurities in the copper electrolyte increases the energy consumption of an electrorefining process and contaminates the deposited copper on cathode. The concentration of impurities increases over time ... -
Boron Removal from Silicon Melt by gas Blowing Technique
Hoseinpur Kermani, Arman; Andersson, Stefan; Müller, Michael; Tang, Kai; Safarian, Jafar (Peer reviewed; Journal article, 2022)Due to the detrimental effects of boron (B) on the efficiency of silicon (Si) photovoltaic cells, complete boron removal from Si is necessary to produce solar grade Si (SoG–Si, with a maximum limit of 0.1 ppmw boron). Gas ... -
Characterization, Calcination and Pre-Reduction of Polymetallic Manganese Nodules by Hydrogen and Methane
Brustad, Ole Kristian; Låstad, Jonas; Hoseinpur Kermani, Arman; Safarian, Jafar (Peer reviewed; Journal article, 2022)A polymetallic manganese nodule was characterized and further calcined and pre-reduced by H2, CH4, and H2-CH4 mixtures at elevated temperatures. It was found that the main Mn and Fe elements coexisted in the ore in different ... -
Isothermal Hydrogen Reduction of a Lime-Added Bauxite Residue Agglomerate at Elevated Temperatures for Iron and Alumina Recovery
Olivia Bogen, Skibelid; Ose Velle, Sander; vollan, Frida; Eijk, Casper van der; Hoseinpur Kermani, Arman; Safarian, Jafar (Peer reviewed; Journal article, 2022)The hydrogen reduction of bauxite residue lime pellets at elevated temperatures was carried out to recover iron and alumina from the bauxite residue in a new process route. Prior to the H2 reduction, oxide pellets were ... -
Kinetic study of vacuum evaporation of elements from ternary melts; case of dilute solution of P in Si-Al melts
Hoseinpur Kermani, Arman; Tang, Kai; Safarian, Jafar (Journal article; Peer reviewed, 2019)This research is devoted to study phosphorus removal from Si-Al alloys by vacuum refining of the ternary system of dilute solutions of P in Si-20 wt%Al. The experiments were carried out in an induction furnace and after ... -
Mechanisms of graphite crucible degradation in contact with Si–Al melts at high temperatures and vacuum conditions
Hoseinpur Kermani, Arman; Safarian, Jafar (Journal article; Peer reviewed, 2019)Graphite is a common refractory material for processing high purity silicon; however, it cannot be applied for holding Si–Al melts at high temperatures due to significant melt infiltration into the crucible. This research ... -
On the phosphorus evaporation from liquid silicon by Knudsen effusion mass spectrometry
Hoseinpur Kermani, Arman; Sergeev, Dmitry; Müller, Michael; Safarian, Jafar (Peer reviewed; Journal article, 2022)Silicon refining for solar applications is intensively on demand, and removal of phosphorus from Si is one of the most challenging steps. Evaporation of P from liquid Si in a vacuum refining process is the most efficient ... -
Selective Vacuum Evaporation by the Control of the Chemistry of Gas Phase in Vacuum Refining of Si
Hoseinpur Kermani, Arman; Andersson, Stefan; Tang, Kai; Safarian, Jafar (Peer reviewed; Journal article, 2021)The evaporation of P from liquid Si under vacuum and reduced pressures of H2, He, and Ar was studied to evaluate the feasibility of effective P removal with insignificant Si loss. It was found that the introduction of Ar ... -
Toward the recovery of solar silicon from end-of-life PVs by vacuum refining
Hoseinpur Kermani, Arman; Tang, Kai; Ulyashin, Alexander; Palitzch, Wolfram; Safarian, Jafar (Peer reviewed; Journal article, 2023)Considering the boom of Si solar cell installation, it is necessary to establish a process for recycling of Si from End-of-life photovoltaics (PVs). Silicon in the PVs is synthetically doped and coated by various elements ... -
Vacuum refining of silicon at ultra-high temperatures
Hoseinpur Kermani, Arman; Safarian, Jafar (Peer reviewed; Journal article, 2020)In the production of solar grade silicon (SoG-Si), Phosphorus (P) removal from Si is a challenge as it cannot be eliminated effectively by the final key directional solidification step in the value chain of the silicon ...