100 applications of activated carbon - purification of carbon monoxide from yellow phosphorus tail gas

With the continuous improvement of the degree of industrialization in modern society, more and more enterprises have invested in the industry. Yellow phosphorus is an important raw material for industrial production. Intermediate products made of yellow phosphorus are widely used in industrial production such as chemical fertilizers, pharmaceutical reagents, detergents, food additives, and fire retardants. Yellow phosphorus is also an important raw material for the defense industry.

My country produces 400,000 tons of yellow phosphorus every year, and every ton of yellow phosphorus produced in the production process will produce 2500Nm3 tail gas, and the annual tail gas volume will reach 1 billion Nm3, and its main component is carbon monoxide.

Carbon monoxide

Carbon monoxide is a carbon-oxygen compound with a chemical formula of CO. It is a colorless, odorless, and tasteless gas under normal conditions. It is a flammable, explosive and toxic gas. The P, S, As, and The toxic components of F, etc. and their compounds will seriously pollute the environment if they are discharged into the atmosphere without treatment.

At the same time, Co is an important carbon-chemical raw material. In industry, carbon monoxide is the basis of one-carbon chemistry. It is mainly used for the production of methanol and phosgene and organic synthesis, so it is necessary to purify carbon monoxide.

Activated carbon

Activated carbon is a commonly used adsorbent, which is a black porous solid with developed pore structure, large specific surface area and strong adsorption capacity.

Due to these characteristics of activated carbon, it has a strong adsorption capacity for gases, inorganic or organic substances in solution and colloidal particles, so as an important solid adsorbent, it has been widely used in separation, purification and catalytic process.

Yellow phosphorus tail gas purification

There are many harmful impurities in yellow phosphorus tail gas, especially sulfur, phosphorus, etc., which are difficult to purify and separate, and activated carbon can use activated carbon due to its large specific surface area, large pore volume and good thermodynamic stability. Adsorption and purification of harmful impurities PH3 and H2S in the tail gas of yellow phosphorus can make the mass concentration of both in the tail gas less than 1mg/m3, and the purification effect is very good. Raw gas requirements.