The sulfur-based cycles employ a high-temperature catalytic sulfuric acid decomposition reaction step. The reaction produces oxygen and generates SO 2, which is used in other reaction steps of the cycle. The reaction takes place from 750 to 900 °C, or higher, and is facilitated by a heterogeneous catalyst.

2020年10月30日 · The main processes occurring in the H 2 SO 4 thermal section are: (1) high temperature decomposition of concentrated sulfuric acid, (2) concentration of the inlet sulfuric acid mixture, (3) separation of the oxygen from the sulfur dioxide mixture. The oxygen is then purified, reaching the required purity targets, and extracted from the plant as ...

2009年5月1日 · This reaction takes place in two steps, a non-catalytic thermal decomposition of the acid to form gaseous SO 3 and H 2 O at temperatures above 350 °C, followed by catalytic decomposition of the SO 3 at temperatures above 700 °C to produce the SO 2 and O 2 products.

2023年8月1日 · The sulfuric acid decomposition rate was determined by using a potentiometric titrator to measure the mass fraction of dilute sulfuric acid raffinate remaining in the reaction mixture. Concentrated sulfuric acid at room temperature with a mass fraction of 98% and a purity level of chemical pure was used as the raw material for the experiment ...

2021年8月5日 · Sulphuric acid decomposition is the high temperature (850–900 °C) reaction step of sulphur based water splitting processes (Iodine–Sulphur and Hybrid-Sulphur processes) for hydrogen production. In this work, reaction kinetics and mass transfer data are generated experimentally, for sulphuric acid decomposition using chromium doped iron ...

Production of hydrogen by the splitting of water at lower temperatures than required for direct thermal decomposition can be achieved by a series of particular chemical reactions [1]. Among the high number of proposed thermochemical water-splitting cycles, the sulfur-based group that employs the catalytic decomposition of sulfuric acid into SO.

A series of pressurized sulfuric acid decomposition tests are being performed to (1) obtain data on the fraction of sulfuric acid catalytically converted to sulfur dioxide, oxygen, and water as a function of temperature and pressure, (2) demonstrate real-time measurements of …

The sulfuric acid decomposition reaction is the highest temperature process in the iodine-sulfur cycle, which requires 850 °C high temperature and catalyst to carry out at a high conversion rate.

2024年1月13日 · The sulfuric acid decomposition reaction is the highest temperature process in the iodine-sulfur cycle, which requires 850 °C high temperature and catalyst to carry out at a high conversion rate. This study prepared a series of loaded sulfuric acid decomposition catalysts using anatase TiO 2 and Ta 2 O 5 as catalyst carriers and precious metal ...

In the Sandia process, sulfuric acid is concentrated by vacuum distillation and then catalytically decomposed at high temperature (850°C) to produce sulfur dioxide, oxygen and water.