Enhancement of thermochemical hydrogen production using an iron–silica magnetically stabilized porous structure

Review of Heat Transfer Research for Solar Thermochemical Applications

“…The peak hydrogen production rate from the MSPS is almost double that of the best rate yet reported in the literature and shown in Fig. 11 [28,76,[85][86][87]. The highly reactive MSPS is very suitable for solar thermochemical applications, and the model can provide an excellent tool for designing and controlling larger scale reactors.…”

“…The bulk kinetic reaction approach for modeling the reactor scale systems is described here. Experimental investigations of reaction kinetics are typically performed using thermogravimeters [64][65][66][67][68][69][70][71][72] or laboratory scale reactors, including fluidized beds [73][74][75], stabilized beds [76][77][78], and monolithic structured reactors [79][80][81][82][83]. Reaction kinetic modeling associated with each of these practices requires special attention to the corresponding experimental conditions.…”

“…In a recent study, the hydrogen production for a laboratory scale iron-based magnetically stabilized porous structure (MSPS) is experimentally investigated [76,77]. It has been recently demonstrated that the MSPS can significantly enhance the production of hydrogen using a two-step nonvolatile looping process [77].…”

“…The core idea is to utilize the magnetic property of iron particles in a Fig. 9 (a) DES simulation of the formed MSPS in a uniform magnetic field [84], and (b) SEM image of MSPS after 11 redox cycles; darker particles are silica and sintered iron chains have lighter tone [76]. (Reproduced with permission from the International Association of Hydrogen Energy.)…”

“…Simulation results of the formed MSPS using discrete element simulation (DES) and SEM images of the MSPS are shown in Fig. 9 [76,84]. The hydrogen production rate measurements are used in the parametric study of the model to find the activation energy, order of the reaction, and the best form of the reaction rate model [77].…”