Mass-Transfer Characteristics of the CO2 Absorption Process in a Rotating Packed Bed

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• 作者：Miaopeng Sheng ; Baochang Sun ; Fuming Zhang ; Guangwen Chu ; Lili Zhang ; Chenguang Liu ; Jian-Feng Chen ; Haikui Zou
• 刊名：Energy & Fuels
• 出版年：2016
• 出版时间：May 19, 2016
• 年：2016
• 卷：30
• 期：5
• 页码：4215-4220
• 全文大小：376K
• 年卷期：0
• ISSN：1520-5029

文摘

This article presents systematic investigations on the mass-transfer characteristics, including the overall gas-phase volumetric mass-transfer coefficient (K_Ga) and the height of mass-transfer unit (HTU), of the CO₂ absorption process into a mixture of diethylenetriamine (DETA) and piperazine (PZ) solution in a rotating packed bed (RPB). The effects of operating conditions, including PZ concentration, rotation speed, liquid volumetric flow rate, gas volumetric flow rate, gas treatment capacity of packing, inlet CO₂ mole fraction, temperature, CO₂ loading of lean solution, and distributor specification on K_Ga and HTU in the RPB, were systematically studied. Also, a comparison of CO₂ absorption performance between the packed column with Dixon rings packing and the RPB is presented. Results indicate that both K_Ga and HTU were significantly affected by rotation speed, liquid volumetric flow rate, gas volumetric flow rate, temperature, and lean CO₂ loading while the PZ concentration, inlet CO₂ mole fraction, and liquid distributor had minimal effect on K_Ga and HTU. It was noted that a RPB exhibits better mass-transfer performance compared to a packed column with Dixon rings packing.