title: Biomass pyrolysis and combustion integral and differential reaction heats with temperatures using thermogravimetric analysis/differential scanning calorimetry.
abstract: Integral reaction heats of switchgrass, big bluestem, and corn stalks were determined using thermogravimetric analysis/differential scanning calorimetry (TGA/DSC). Iso-conversion differential reaction heats using TGA/DSC pyrolysis and combustion of biomass were not available, despite reports available on heats required and released. A concept of iso-conversion differential reaction heats was used to determine the differential reaction heats of each thermal characteristics segment of these materials. Results showed that the integral reaction heats were endothermic from 30 to 700°C for pyrolysis of switchgrass and big bluestem, but they were exothermic for corn stalks prior to 587°C. However, the integral reaction heats for combustion of the materials followed an endothermic to exothermic transition. The differential reaction heats of switchgrass pyrolysis were predominantly endothermic in the fraction of mass loss (0.0536-0.975), and were exothermic for corn stalks (0.0885-0.850) and big bluestem (0.736-0.919). Study results provided better insight into biomass thermal mechanism.
authors.affiliation: Department of Agricultural and Biosystems Engineering, North Dakota State University, 1221 Albrecht Boulevard, Fargo, ND 58102, USA.
authors.forename: Jiacheng
authors.initials: J
authors.lastname: Shen
authors.affiliation: Department of Agricultural and Biosystems Engineering, North Dakota State University, 1221 Albrecht Boulevard, Fargo, ND 58102, USA. Electronic address: Igathinathane.Cannayen@ndsu.edu.
authors.forename: C
authors.initials: C
authors.lastname: Igathinathane
authors.affiliation: Department of Agricultural and Biosystems Engineering, North Dakota State University, 1221 Albrecht Boulevard, Fargo, ND 58102, USA.
authors.forename: Manlu
authors.initials: M
authors.lastname: Yu
authors.affiliation: Department of Agricultural and Biosystems Engineering, North Dakota State University, 1221 Albrecht Boulevard, Fargo, ND 58102, USA.
authors.forename: Anand Kumar
authors.initials: AK
authors.lastname: Pothula
mesh_terms: D002152:Calorimetry, Differential Scanning / Q000379:methods*; D003198:Computer Simulation; D004735:Energy Transfer; D006361:Heating / Q000379:methods*; D008954:Models, Biological; D008956:Models, Chemical; D018547:Plant Stems / Q000737:chemistry*; D013696:Temperature; D013814:Thermal Conductivity; D013816:Thermodynamics; D013818:Thermogravimetry / Q000379:methods*
keywords: Big bluestem; Corn stover; Lignocellulosic biomass; Switchgrass; Thermal properties