Influence of catalysts on co-combustion of sewage sludge and water hyacinth blends as determined by TG-MS analysis. (January 2018)

• Record Type: Journal Article
• Authors: Huang, Limao; Xie, Candie; Liu, Jingyong; Zhang, Xiaochun; Chang, KenLin; Kuo, Jiahong; Sun, Jian; Xie, Wuming; Zheng, Li; Sun, Shuiyu; Buyukada, Musa; Evrendilek, Fatih
• Is Part Of: Bioresource technology. Volume 247(2018)
• Page Start: 217
• Page End: 225
• Publication Date: 2018-01
• Subjects: Sewage sludge -- Water hyacinth -- Catalysts -- Co-combustion -- TG-MS; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2017.09.039
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Co-combustion of biomass with K2 CO3, Na2 CO3 and MgCO3 was studied by TG-MS. Kinetic and thermodynamic parameters (Δ H, Δ S, Δ G ) were obtained through TGA curves. Main dominating steps were the organic volatile matter release and combustion stage. Na2 CO3 was the most effective among the tested catalysts for the co-combustion. Adding K2 CO3 catalyst to the biomass reduced the formation of flue gases. Abstract: Effects of the three metal carbonates (K2 CO3, Na2 CO3, and MgCO3 ) were quantified on catalytic co-combustion of the sewage sludge and water hyacinth (SW) blend using a thermogravimetric-mass spectrometric (TG-MS) analysis and kinetics modeling. The main dominating steps of the catalysts were the organic volatile matter release and combustion stage. Weighted mean values of activation energy ( E m ) were estimated at 181.18 KJ·mol −1, 199.76 KJ·mol −1, 138.76 KJ·mol −1, and 177.88 KJ·mol −1 for SW, SW + 5% K2 CO3, SW + 5% Na2 CO3, and SW + 5% MgCO3, respectively. The lowest E m occurred with SW + 5% Na2 CO3 . Overall, catalyst effect on co-combustion appeared to be negligible as indicated by Gibbs free energy ( Δ G ) . The normalized intensities of SW + MgCO3 were strongest . The addition of Na2 CO3 and MgCO3 to SW increased flue gases emissions (CO2, NO2, SO2, HCN, and NH3 ) of SW, whereas the addition of K2 CO3 to SW reduced flue gases emissions from the entire combustion process.