Citation:
MA Shuang-chen, WANG Meng-xuan, SONG Hui-hui, ZANG Bin. Influence of liquid coexisting components on CO2 desorption from decarburization absorbing solution by ammonia method[J]. Journal of Fuel Chemistry and Technology,
;2013, 41(4): 477-483.
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The reaction mechanisms of SO2, NOx, CO2 with ammonia solution were described. And the liquid coexisting components related to the desorption of simulated decarburization solution, including (NH4)2SO3, (NH4)2SO4, NH4NO3, NaCl, NH4Cl and (NH4)2CO3, were analyzed. The results show that the desorption of CO2 is affected by the mass fraction of liquid phase coexistence components, pH of solution and surface tension. Most of liquid coexisting components could reduce CO2 desorption of decarburization solution. The restraining effect of liquid coexisting components with the mass fraction less than 10% in the decarburization absorbent liquid on CO2 desorption is as follows: (NH4)2SO3>NH4NO3>(NH4)2SO4 >NaCl>(NH4)2CO3. It is necessary to remove the impurities in flue gas before CO2 capture, because the purities are harmful for CO2 desorption due to the hazardous effects on the physical and chemical characteristics of decarburization solution.
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Keywords:
- ammonia method,
- liquid phase coexistence components,
- desorption,
- CO2
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