This paper presents a comprehensive parametric analysis concentrated to the design of a novel low temperature hydrogen porous micro-reactor. The main important of this work is optimizing the water production process by a complete parametric description. In the analytical solution of this problem, the velocity profile is first determined by solving the momentum equation, and this result is then used in the energy and mass concentration equations to obtain thermal and mass parameters. The solution is achieved through a non-asymptotic solution that concurrently incorporates both mathematical and physical aspects, taking into account the matching conditions . Maximum variation of Nusselt number in the width of microchannel is observed for the alumina porous medium, with values of 58.70% and 67.69% respectively with 95% and 90% porosities. The rate of hydrogen to water conversion in alumina media is approximately 41% faster than titanium oxide and 67% faster than silicon carbide. The maximum variation of Sherwood number in the width of microchannel is observed for the silicon carbide porous medium, with values of 58.33% and 50.13% respectively with 95% and 90% porosities. As the porosity coefficients increase from 85% to 95% the variation rates of fluid and solid phase temperature is decreased from 78.01% to 45.09% and 65.92% to 35.09%. the porosity coefficient, the rate of hydrogen to water conversion is increased from 43.01 to 75.05%.