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2009 International Conference on Energy and Environment Technology

Experimental Studies on CO2 Capture in a Spray Scrubber using NaOH Solution

Niu Zhenqi, Guo Yincheng*, Lin Wenyi

Department of Engineering Mechanics, School of Aerospace

Tsinghua University Beijing 100084, China E-mail: guoyc@

Abstract—Experimental studies on carbon dioxide capture in a plate tower and bubble reactor. While, the spray scrubber spray scrubber are carried out. Fine spray of sodium presents many advantages as gas-liquid contactors such as hydroxide (NaOH) solution is used as CO2 absorbent. Effects high levels of gas treatment efficiency, low pressure drops, of different operating and design parameters, including the possibility to work in a wide range of liquid to gas flow concentration of NaOH solution, liquid flow rate, total gas flow rate ratios, and low investment costs [8]. A strategy, rate, initial temperature and concentration of carbon dioxide suggested by Storaloff et al. [9], is to generate a ne spray of on CO2 removal efficiency are investigated. the absorbing solution for providing large surface to the

atmospheric air ow through an open tower. Storaloff et al.

Keywords-carbon dioxide capture; NaOH solution; spray;

[9] studied the feasibility of a NaOH spray-based contactor flue gas

by estimating the cost and energy requirement per unit CO2 captured. However, the flue gas that power plants generate is

I. INTRODUCTION not taken into account. And the operation and design

The problem of global warming due to increasing parameters’ study is lack. So, in this work, the performance atmospheric CO2 concentration is arguably the most of NaOH spray scrubber is evaluated experimentally under important environmental issue that the world faces today. It various conditions to study effects of operation parameters, is imperative to reduce carbon emission by using new energy, including concentration of NaOH solution, liquid flow rate, saving energy, improving energy efficiency and carbon total gas flow rate, initial temperature and concentration of

carbon dioxide. capture and storage (CCS). In the coming few decades, new

energy will not play a major role in the energy supply. The

II. EXPERIMENTAL SETUP AND REACTION MECHANISM contribution to the carbon emission reduction through saving

energy and improving energy efficiency is after all limited

[1]. It has huge potential for the contribution to carbon A. Scrubber for CO2 Capture

A novel scrubber for carbon dioxide capture is designed, emission reduction by CCS, which will cut down the

consumption of climate change mitigation [2]. Fossil-fired

which is combined with the NaOH solution fine spray and discharged CO2more in China, so CO2plants is significant. Several technologies of CO2capture CO2(MEA) process for CO2In wet scrubbing techniques, CO2CO2solution