E neutral point with the energy provide, which acquisition tools (as
E neutral point on the power provide, which acquisition tools (as illustrated in Figure 25). had a maximum supply voltage of 10 kV and present of 500 mA. The operator could preset the Reactor Experimental energy provide automatically self-adjusted the voltage. As a three.1.two. current, whereas the Procedure safetyThe H and CO reactant gases (both 99.999 mol purity)), acquired from Afrox (Durprecaution, two 1 k resistors were inserted in series amongst the energy supply two and reactor in order have been mixedsupply current. A similar /CO ratio of two.two:1. Composition ban, South Africa), to limit the to type syngas having a H2 energy supply and its (Z)-Semaxanib c-Met/HGFR electrical design have been previously described Plus gas chromatograph (Kyoto, Japan), prior to experianalysis working with a Shimadzu 2010 by Fulcheri et al. [1]. Aside from the only methane (up provide, the equipment as an incorporated periphments, showed thatreactor and energy to 15 ppm) was present setup impurity inside the syngas. eral gear, which included a syngas mixing vessel and reactor feed system, PK 11195 manufacturer making use of an Ahead of each experiment, the reactor was purged with helium and evacuated a products sampling port,pump in order to data (temperature, stress, voltage and existing) acEdwards vacuum and manage and remove product impurities from preceding experiments. quisition tools (as illustrated in mixture25). delivered towards the reactor at the desired operating Just after purging, the syngas Figure was pressure (in between 0.five and 10 MPa). The mobile electrode (anode) was then moved along three.1.2. Reactor Experimental Procedure an axial axis, using a positioning system, till it contacted the fixed electrode (cathode). The H2 and CO reactant gases (each 99.999 mol purity)), acquired from Afrox (Durban, South Africa), have been mixed to type syngas using a H2/CO ratio of two.2:1. Composition analysis using a Shimadzu 2010 Plus gas chromatograph (Kyoto, Japan), prior to experiments, showed that only methane (up to 15 ppm) was present as an impurity inside the syngas. Just before each experiment, the reactor was purged with helium and evacuated usingCatalysts 2021, 11,31 ofElectrode continuity was confirmed by a multimeter. Direct tip-to-plane speak to of the electrodes was compulsory as a way to cut down the gas resistivity and overcome the restrictions enforced by Paschen’s Law under the low current (450 mA) and high stress (1 MPa) operating conditions. Subsequent to electrode make contact with, the higher voltage DC power supply was switched on. The energy supply was pre-set towards the required provide existing (among 250 and 450 mA) and ignition voltage (eight kV). Once the power supply was activated, the mobile anode was immediately retracted in the fixed cathode, instantaneously forming a luminous arc discharge. The anode was retracted until an inter-electrode gap of 1 mm (in between the electrodes) was acquired. The discharge was maintained at this electrode gap, at which syngas therapy proceeded to get a pre-determined period of either ten or 60 s. Just after this discharge period, the power supply was switched off, instantaneously extinguishing the arc discharge. As a safety measure, an insulated copper wire was utilized to transmit residual charge in the arc discharge reactor to ground. Thereafter, the products have been sampled in the reactor and analyzed off-line employing a Shimadzu 2010 Plus Gas Chromatograph (Kyoto, Japan). The GC was fitted with a thermal conductivity detector (TCD), calibrated to detect CO and H2 , along with a flame ionization detector (FID), calibrated to detect.