A method for producing soda ash from flue gases involves capturing and processing the gases to remove contaminants and produce a high-purity soda ash. The process involves passing flue gas through a carbon capture system, where nitrates and sulfates are removed from the gas. The gas is then scrubbed with a rich caustic, causing a chemical reaction that removes carbon dioxide. The resulting product is then separated into a purified Na.sub.2CO.sub.3 product, essentially pure soda ash.

A method for preparing trichlorosilane involves reacting silicone tetrachloride in a photo-assisted reactor, where reactant gases are fed through a gas diffusion electrode, and an electric current ionizes the reactant species in the presence of a catalyst. This process results in the formation of trichlorosilane at a temperature of less than 300 C.

A method for designing and implementing a zinc air battery that can be recharged, which involves adding hydrogen gas to the battery, causing it to react with hydroxyl groups in the electrolyte, and then circulating an electrolyte in the presence of a zinc anode to facilitate the recharging process.

[Problem to be solved] Provided is a method that enables effective industrial use of an exhaust gas containing hydrogen to be discharged during production of trichlorosilane. [Solution] Provided is a method for producing trichlorosilane, the method comprising: reacting metallic silicon and tetrachlorosilane with a mixed gas containing hydrogen to generate trichlorosilane. The mixed gas containing hydrogen contains 1 to 500 molar ppm of hydrogen chloride and 100 to 10,000 molar ppm of silane hydride, and the mixed gas is heated at 100 C. to 450 C. and then reacted.

A production system, production method and application of general-purpose high-purity chemicals are disclosed. The production system includes a raw material tank, and an adsorption system, a crystallizer, a first light-impurity removal tower, a first heavy-impurity removal tower, a second light-impurity removal tower, a motorized tower, a second heavy-impurity removal tower, a vapor permeation device, a membrane separation system and a filling system connected with the raw material tank in sequence. The high-purity chemicals produced by the above system have high purity and excellent quality. Compared with the prior art, the system and method designed by the present disclosure have more pertinence, integrity, progressiveness, energy-saving, precision, high safety coefficient and great industrial promotion value. And the products produced are of excellent quality, which can meet the standards applied to the manufacturing of integrated circuit electronic components and meet the high-end needs of the semiconductor industry market.