Commercial grade raw zeolite ZSM-5 pellets, with Si/Al of 50, were acquired by the Department of Chemical Engineering (CE), The University of Manchester, from Pingxiang Naike Chemical Industry Equipment Ltd© (China). An amount of 7g of bacterial agar powder (Sigma Aldrich©, US) was used to reinforce half of the surface of the zeolite pellet with coarse zinc powder, particle size about 0.3-1.5 mm (14-50 mesh ASTM), EMSURE® Reag. Ph Eur (Sigma Aldrich©, UK). The gel powder was dissolved in 100 ml of highpurity deionised water then heated on a hot plate and stirred continuously until it became homogeneous and viscous. Subsequently, ZSM-5 pellets were systematically semiimmersed individually in the done gel, using a forceps, and then coated/dusted with 0.5 g of zinc coarse powder. The resulting zinc-gel-reinforced zeolite pellets were left to dry for 4 days to allow the gel to solidify into a hard resin-like structure, holding the zinc fine metal pieces firmly onto the gel-surfaced part of the zeolite. The experiment took place at room temperature and the pH and conductivity were measured several times during the experiment using a Eutech PC 2700 probe (Thermo Scientific©).