PARTICULATE MATTER FORMATION DURING CO-COMBUSTION OF AGRICULTURAL RESIDUES WITH TURKISH LIGNITE USING A DROP TUBE FURNACE

Authors : Feyza KAZANÇ ÖZERİNÇ

Pages : 317-325

Doi:10.18038/estubtda.517556

View : 21 | Download : 11

Publication Date : 2019-09-26

Article Type : Research Paper

Abstract :This study investigates the particulate matter formation during combustion of olive residue, almond shell, and Tunçbilek lignite. Selected fuels insert ignore into journalissuearticles values(olive residue and Tunçbilek lignite); were also co-fired to evaluate the influence on particulate matter emission. Olive residue was ground to different size ranges insert ignore into journalissuearticles values(< 125 µm and 212–300 µm); to investigate the influence of the particle size and blended in different ratios of biomass / coal to analyse the interactions between fuels. Tests were performed in a drop tube furnace at high temperature insert ignore into journalissuearticles values(1000 ºC);, with a high heating rate insert ignore into journalissuearticles values(~10 4 ºC/s);, and short residence time insert ignore into journalissuearticles values(~3 s);. Fuel was fed into the furnace at a low mass rate of 10 g/h using a syringe pump. Particulate matter was collected using a 3-stage stack impactor and categorized according to the aerodynamic diameters, PM2.5, PM2.5-10, and PM10. The results obtained included particle burnout, and particulate matter concentration. Particle burnout was above 95% for all studied fuels. Particulate matter emission depended greatly on the fuel and the blend. Olive residue presented the lowest values of PM2.5 insert ignore into journalissuearticles values(176 mg/g ash in fuel fed); compared with both almond shell insert ignore into journalissuearticles values(214 mg/g ash in fuel fed); and Tunçbilek lignite insert ignore into journalissuearticles values(286 mg/g ash in fuel fed);. PM10 emission was particularly low for olive residue insert ignore into journalissuearticles values(~200 mg/g ash in fuel fed);, whereas almond shell and Tunçbilek lignite showed similar values insert ignore into journalissuearticles values(~400 mg/g ash in fuel fed);. Larger biomass particles resulted in unchanged particulate matter emissions. Co-firing of the olive residue with the Tunçbilek lignite resulted in lower PM2.5 insert ignore into journalissuearticles values(as compared to neat olive);; higher PM2.5-10 insert ignore into journalissuearticles values(as compared to neat lignite);; and lower PM10 insert ignore into journalissuearticles values(as compared to lignite);. Blends of OR-TL in 25-75 ratio showed lower values of both PM2.5 and PM10 as compared with the 50-50 blends of the same fuels.
Keywords : Turkish lignite, biomass, co firing, particulate matter, drop tube furnace