Numerical Simulation of Hi Thermal Decomposer in Iodine-Sulfur Cycle Process

The very high-temperature gas-cooled reactor is a fourth-generation reactor with inherent safety and modular high-temperature characteristics. Utilizing ultra-high temperature heat to produce hydrogen by iodine-sulfur cycle is one of the important applications. In this process, the decomposition of hydroiodic acid determines the efficiency of hydrogen production, so it is important to design a hydroiodic acid decomposer with the compact structure and good heat preservation. In this paper, numerical simulations are performed on the hydroiodic acid decomposer used for the decomposition of hydroiodic acid. The species transport model, volume reaction and porous model are used to calculate the temperature field and the distribution of each component. The results show that the temperature of the catalytic zone meets the reaction requirements, the temperature drop in the reactor is about 55 K, and the overall decomposition fraction can reach 21.4%. The current flow rate has an acceptable performance for the improvement of the decomposition rate. The results of this study can provide theoretical calculation references for the engineering application of hydroiodic acid decomposers.

Effect of doping on the phase stability and photophysical properties of CsPbI2Br perovskite thin films

In this study, we demonstrate that in addition to improving the crystallization of CsPbI2Br films, the incorporation of Cl− and hydroiodic acid in the precursor solution leads to the formation of films with high coverage and large grains size.

Spontaneous anion-exchange synthesis of optically active mixed-valence Cs2Au2I6 perovskite from layered CsAuCl4 perovskite

Cs2Au2I6, a lead-free photovoltaic material, has been synthesised via a controlled and systematic addition of hydroiodic acid (HI) in CsAuCl4. X-ray diffraction studies suggest the formation of Cs2Au2I6 when a...

Synthesis of reduced graphene oxide paper for EMI shielding by a multi-step process

A multi-step reduction process was developed to produce reduced graphene oxide (rGO) paper for electromagnetic interference (EMI) shielding. First step reduction was achieved by hydroiodic acid to remove most of the oxygen-containing functional groups, and sodium borohydride was used in the second step reduction to reduce carbonyl group which is the most difficult functional group to remove. In the last step reduction, hydroiodic acid was used as reducing agent again to remove the remaining oxygen-containing functional groups. The results show that this method can greatly improve the conductivity and EMI shielding performance of rGO paper. The resulting rGO paper with a C/O ratio of 19.38 and a thickness of 9.1[Formula: see text][Formula: see text]m exhibited high conductivity of 1084[Formula: see text]S/cm and excellent average EMI shielding efficiency of 45.84[Formula: see text]dB in the X-band, better than that reduction by other chemical methods.