Simultaneous production of hydrogen as an energy carrier and chlorine as a valuable chemical from recycled hydrogen chloride was investigated employing a lab-scale membrane electrolysis setup. The effects of various process parameters including current density (1-4kAm(-2)), cell temperature (45 degrees-75 degrees C), flow rate of hydrochloric acid feed (200-500mLmin(-1)), and concentration of acid (18-21wt.%) on the cell voltage and chlorine current efficiency (ChCE) were studied. The Taguchi design of experiments (L-16 array) was employed to design the minimum number of experiments necessary to fully study the process. A filter press type cell of 10cm(2) surface area comprising a DSA anode, an alloy of predominantly nickel cathode and Nafion 115 membrane, was used. It was observed that increasing anolyte flow rate, anolyte concentration, or cell temperature caused a decrease in cell voltage and an increase in ChCE, while increasing current density linearly increased cell voltage and decreased ChCE.