Abstract
An integrated electromigration membrane absorption method has been proposed for the separation of NO from simulated mixed gas. The experiments were conducted to investigate the effect of discharge voltage, gas flow rate, inlet concentrations, and absorbents on the NO separation efficiency and total mass transfer coefficient in the integrated electromigration membrane reactor. The experimental results demonstrated that the NO separation efficiency and total mass transfer coefficient increased with the increase in the applied discharge voltage of the integrated electromigration membrane reactor. Regardless of discharge or not, the separation efficiency of NO continuously decreased with the increase in the gas flow rate and inlet concentration of NO in the experimental process. The total mass transfer coefficient of NO increased first and then decreased with an increase in the gas flow rate, while it decreased with an increase in NO inlet concentration. Compared with the membrane absorption without discharge voltage under the condition tested, at a discharge voltage of 18kV, the NO separation efficiency and the total mass transfer coefficient increased by 48.7% and 9.7 times, respectively.
Highlights
With the frequent occurrence of pollution and the aggravation of resource shortage, pollutant control technology has been investigated from pollution removal to the resource utilization of pollutants [1]
Compared with the membrane absorption without discharge voltage under the condition tested, at a discharge voltage of 18kV, the NO separation efficiency and the total mass transfer coefficient increased by 48.7% and 9.7 times, respectively
In view of the above, this paper proposed an integrated electromigration membrane separation process which organically combined plasma technology, electromigration, membrane separation, and chemical absorption
Summary
With the frequent occurrence of pollution and the aggravation of resource shortage, pollutant control technology has been investigated from pollution removal to the resource utilization of pollutants [1]. Selective catalytic reduction denitrification (SCR), which reduces NOx emission, shows a high removal efficiency They are accompanied by some technical difficulties, such as large equipment, air preheater clog, trashy catalyst disposal, and so on [4,5,6]. Wang et al [15] carried out an investigation on the characteristics of NOx removal by membrane absorption Among these studies, the transfer of gas molecules through a membrane mainly depends on the concentration difference and the pressure difference of gas in the two sides of the membrane [16], which is accompanied by high gas driving force and large unit gas membrane area for achieving a high gas separation efficiency [8]. It is hoped that this research can provide new ideas and references for the development of gas separation technology
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