Role of alkali chloride on formation of ultrafine particulate matter during combustion of typical food waste

Effect of Potassium Chloride on the Nanostructure and Reactivity of Soot Particles from Combustion of Municipal Solid Waste

“…Previous studies have identified plastics and food waste as the main sources of chlorine in MSW, and the existence of Cl could promote the release of alkali metals. 44 In contrast, sodium species were rarely observed in soot probably as a result of their low content in fuels, similar to the EDS results reported by Cheng et al 24 In comparison to sodium, potassium is found to be more easily released into the gas phase. 11 In MSW incineration, except for a few transferred to the ash fraction, large quantities of potassium were released during the devolatilization and char burnout stage, primarily in the form of KCl or KOH.…”

“…The first observation was that the flame temperature increased and then declined as the HAP increased from 5 to 40 mm, consistent with what has been observed for the diffusion flame. 7,24,31 With the increasing KCl addition ratio from 1 to 5%, it was found that the flame temperature slightly decreased. However, the temperature difference is very small at all HAPs, only 10−20 K. Besides, it was noticed that the fluctuation of the flame morphology may be partly a reason for the difference.…”

“…To investigate the influence of KCl on soot formation, the MSW and KCl were mixed together through the dipping method to prepare the experimental samples. According to the previous studies, ,, 1% (SK-1%), 3% (SK-3%), and 5% (SK-5%) potassium weights of the samples were selected in this work. For comparison, the raw MSW with no additional KCl was denoted as the reference sample (reference).…”

“…Moreover, the degree of graphitization of soot exhibited a decreasing tendency with the increase of plastic content in the mixed waste. 23 Cheng et al 24 recently investigated the effect of the NaCl loading ratio on the formation of PM from food waste (one typical waste fraction) incineration. They found that, by the addition of NaCl, the morphology of the nanoparticles sampled from the flame hardly changed through the transmission electron microscopy (TEM) observation.…”

Corrosion Assessment of Metals in the Presence of Food Waste Fermentation Solution Through the Experimental Study

“…Under the full submersion (FS) condition, the weight loss values of HT200 are highest (14, 050 mg/m 2 after 192 hours). Under the half submersion (HS) condition, the weight loss values of HT200 and 45 steel have Generally, the food waste fermentation solution contains high concentrations of organic acids with chloride [4]. HT200, 45 steel, and Q345B contain a high concentration of iron and most iron-based metals can be corroded by organic acids [5].…”