Experimental Study on the Removal of Real Exhaust Pollutants from a Diesel Engine by Activated Carbon

Abstract

So far, most of the experimental researchers studying the removal of diesel exhaust pollutants have done so with simulated exhaust gas, which cannot demonstrate the ability of catalysts accurately. Because activated carbon (AC) has low price, no secondary pollution, good adsorption performance, and certain catalytic activity, it has good application prospects in the field of marine exhaust pollutant removal. In this paper, the removal of particulate matter (PM), carbon monoxide (CO), and NO x from real exhaust gas by AC was studied. The results show that PM removal efficiency reached up to 77%, while the pressure drop increased with running time. AC may degenerate to some extent with the increase of temperature, resulting in a negative removal efficiency of CO. The denitration efficiency of AC was up to 34.5% without urea, and further increased to 44.8% after spraying urea, still a distance from industrial applications. In the future, it may be necessary to install a fan to compensate the reactor or to backwash the reactor to avoid excessive pressure drop. The thermal stability of the AC also needs to be improved. To increase the denitration performance, it may be helpful to modify the AC or impregnate other metal oxides.

Efek Holding Time Proses Aktivasi Terhadap Struktur Pori Karbon Aktif Dari Ampas Kopi Seduh

“…Struktur pori seperti itu menyebabkan karbon aktif memiliki kemampuan adsorpsi yang tinggi sehingga banyak diaplikasikan dalam berbagai aplikasi praktis. Aplikasinya sangat luas meliputi penyimpanan gas metana [2][3][4], pemurnian biogas [5,6], menghilangkan zat pewarna [7], penyerapan CO 2 [2,[8][9][10], penghilangan polutan knalpot dari mesin diesel [11], sebagai bahan filter pada catalytic converter [12], sebagai bahan super kapasitor [13], dan masih banyak aplikasi lainnya.…”

Pilot-scale study on acid absorption process for ammonia removal from exhaust gas of denitrification catalyst

“…Furthermore, the spread of NOx into the atmosphere would destroy the atmospheric ozonosphere, disrupts the balance of radiation from the sun, leading to global warming and human beings through various health issues including skin cancer [1]. In the industrial field, the methods of exhaust gas recirculation (EGR) and selective catalytic reduction (SCR) technologies are commonly used to reduce NOx emissions [2]. The methods of EGR have its limits because it is difficult to meet the latest emission target requirements of the factory, therefore, many external purification treatment means are studied for many years, ammonia selective catalytic re-duction (NH3-SCR) technology is one of effective ways in denitration for converting NOx with the aid of a catalyst into N2 and H2O, with the catalyst playing a key role in the process [3], and its main reaction process [4] is as follows:…”

Effect of Liquid Grounding Electrode on the NOx Removal by Dielectric Barrier Discharge Non-Thermal Plasma

“…In order to reduce the harm of NOx to the environment, a lot of NOx removal researches have been conducted and many solutions have been proposed. Among them, exhaust gas recirculation (EGR) and selective catalytic reduction (SCR) are both relatively efficient treatment technologies [4]. Recently, the non-thermal plasma (NTP) NOx removal technology has attracted wide attention for its advantages of and compact system structure, and significant progress has been made [5][6][7].…”