Akademik Veri Yönetim Sistemi
Energy, Ecology and Environment, 2026 (ESCI, Scopus)
Improved biomass gasification methods and more accurate classification of biomass types are crucial for more sustainable energy production and more efficient use of energy resources. This study provides new information on the isotopic changes of C3 (wheat straw) and C4 (corn straw) biomass during aqueous phase reforming gasification, demonstrating a novel approach for identifying biomass sources and improving gasification processes. Isotope measurements were conducted using the CM-CRDS (Combustion Module-Cavity Ring-Down Spectroscopy) system. Changes in carbon isotopes during the gasification process and the isotopic differences between the gasification products obtained from C3 and C4 plants were determined. The isotopic values of both biomass types exhibited a positive shift during the gasification process, ranging from − 27.615 to -25.811 for C3 plants and from − 14.297 to -14.192 for C4 plants. This indicated that the solid and liquid phases were enriched in the 13 C isotope, while the lighter 12 C tends to form carbon dioxide and other gases (CH₄, C₂H₂, and C₂H₆). This study compared the hydrolysis and gasification performances of C3 and C4 plant biomass. TOC (total organic carbon) analysis showed that C4 biomass released more organic carbon (6884.8 mg/L) and was more easily hydrolyzed. GC-TCD (gas chromatography with a thermal conductivity detector) yielded higher amounts of gas and hydrogen (45.02%) from C4 biomass. SPME-GC-MS/MS (Solid-Phase Microextraction with Gas Chromatography-Mass Spectrometry) analysis revealed significant differences in phenolic and furan-derived compounds between the two biomass types. After gasification, the δ¹³C analysis of C3 and C4 plants showed significant differences in the biomass source. The increase in δ¹³C values observed especially in gases derived from C4 plants shows that these plants carry the traces of photosynthetic processes. The continuation of these isotopic changes after gasification reveals that δ¹³C isotope fingerprints can be used to determine the biomass source even after thermal conversion. Based on these results, it is possible to identify the type of biomass utilized and adjust the gasification process to obtain the suitable gas composition by using the δ¹³C analysis of gasified products.