Co-Combustion Characteristics and Kinetic Analyses of Biomass Briquette and Municipal Solid Waste in N2/O2 and CO2/O2 Atmospheres

Abstract

The thermal behavior of cotton straw briquette (CSB), municipal solid waste (MSW), and their blends was investigated using a thermogravimetric analyzer under N2/O2 and CO2/O2 atmospheres at 20 °C/min from an ambient temperature to 1000 °C. The kinetics and synergistic interaction between MSW and CSB in the co-combustion process were evaluated. The results indicated that MSW blended with CSB improved the ignition and burnout characteristics of the blends, while decreasing the comprehensive combustion characteristics index. The suitable proportions of CSB were less than 60% and 40% separately under 80N2/20O2 and 80CO2/20O2 atmospheres, respectively. The inhibitory effect of CO2 induced burnout temperature and residual mass increased, and the high-temperature stage reaction varied. Kinetic analysis of the blends indicated that blending with CSB could promote MSW combustion in the first reaction stage, while the second and third decomposition stages were complicated because of the synergistic interaction between MSW and CSB in the co-combustion process. The nth order reaction model fit the mass loss of theca-combustion process for the blends very well.

Recyclable Iron Reduction Denitration: A Strategy for Removal of Nitrogen Oxides

“…The flow reactor experiments conducted by Glarborg et al indicated that the NO reduction potential of H 2 and CO increased slightly with temperature . Xing et al investigated the CO emission characteristics of municipal solid waste incineration and found that at lower temperatures (750–850 °C), more reducing gases such as CO were generated, which could reduce some of the NO to N 2 , thus lowering the amount of NO . At 800 °C, 2% vol of CO/N 2 was introduced into the reduction reactor for 0, 5, 10, 15, and 20 min.…”

“…44 Xing et al investigated the CO emission characteristics of municipal solid waste incineration and found that at lower temperatures (750−850 °C), more reducing gases such as CO were generated, which could reduce some of the NO to N 2 , thus lowering the amount of NO. 45 At 800 °C, 2% vol of CO/N 2 was introduced into the reduction reactor for 0, 5, 10, 15, and 20 min. Then, the mixture of CO and NO in the N 2 balance was supplied into the reactor to obtain the removal efficiency over time, as shown in Figure 6.…”