Study On Absorption Of High Concentrations Of Carbon Dioxide In Rotaing Packed Bed

The20th century has seen the rapid increase of population and explosive growth in energy consumption.As more countries becoming industrialized, it is expected that more energy will be consumed in21st century. High concentrations of carbon dioxide, mainly in steel-making furnace gas, natural gas, biogas and landfill gas and other gas mixture, so the removal of high concentrations of carbon dioxide gas can further reduce pollution of the atmosphere, while increasing the heat value of gas to increase energy.As an entirely new type and efficient multiphase flow contact device, Rotating Packed Bed can greatly enhance the process of mass transfer and has been widely used in chemical separation and the preparation of nano-materials. This work studied the capture of30%volCO2in the rotating packed bed by using different amine aqueous as the absorbent, using single factor analysis of the effect of rotating speed, absorbing liquid temperature, concentration of absorbent, liquid flow rate, total gas flow rate on the removal effect, and comparing different mass transfer unit height in rotating packed bed.Experimental results indicated that the capture efficiency increases with amine concentration, the increase of Jiquid flow, with the gas flow increases. In the temperature range of30～70℃, the temperature on the removal rate is not obvious. When the rotating speed is1000rpm, the capture efficiency reached the maximum. By comparing the different absorbers on the capture efficiency of30%volCO2effect, research shows that the removal of a single absorbent effect of CO2:DEA>MEA>MDEA; mixed absorbent of CO2 capture efficiency:MEA+PZ, DEA+PZ Optimal mixture of two, followed by: MDEA+PZ>K2CO3+PZ>K2CO3+DEA>K2CO3+MEA. Calculation of mass transfer unit height (HTU) in rotating packed, found a high degree of mass transfer unit height (HTU) with the increase of gas flow decreases, and the DEA+PZ system filled with the minimum height of transfer unit.