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Iranian Journal of Chemistry and Chemical Engineering، جلد ۴۲، شماره ۱۱، صفحات ۳۶۹۷-۳۷۰۶
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عنوان انگلیسی TGA-FTIR analysis of evolution of oxygenated organics by isothermal low-temperature decomposition of Rice Straw Hydrolysis Residue
چکیده انگلیسی مقاله The study presents a TGA-FT-IR analysis of low-temperature thermochemical transformations of Rice straw hydrolysis residue (RSHR). Isothermal decomposition of RSHR was carried out for 3 h, at decomposition temperatures of 200, 250, 300, and 350 oC. At 200 oC, the rate of mass loss never exceeds %1/min and except for the first five minutes, it is less than %0.5/min. The initial rate of mass loss at 250 oC is %1.6/min which quickly drops to %0.6/min in the first 10 minutes and goes on further decreasing thereafter. At 300 oC, there is a rapid initial mass loss with the initial rate peaking at %8.8/min. At 350 oC, there is an initial burst of volatiles accounting for most of the mass loss with the initial rate of mass loss being %50/min. The residual mass obtained after these runs was 81.5, 38, 24, and 15%, respectively. FT-IR spectra of evolved gases suggest that volatile oxygenated organics along with non-condensable components like CO2, and CO are evolved during low-temperature thermal decomposition of RSHR. Carbonyls – acids, esters, aldehydes, and ketones – are the main functional groups in the volatiles. Strong absorption bands ranging 3400 – 3900 cm-1 indicated the presence of alcohols and phenols as other functional groups. Decomposition residues, the biochar, were demethoxylated and dehydrogenated compared to RSHR but retained their basic lignocellulosic nature.
کلیدواژه‌های انگلیسی مقاله isothermal decomposition,evolved gases,volatiles,biochar
نویسندگان مقاله Himadri Roy Ghatak |
Department of Chemical Engineering, Sant Longowal Institute of Engineering and Technology, Longowal, Sangrur, Punjab, INDIA

نشانی اینترنتی https://ijcce.ac.ir/article_708248_f3985caeba72960c382fd2f41c76e132.pdf
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