Biomass microspheres – A new method for characterization of biomass pyrolysis and shrinkage. (February 2019)

• Record Type: Journal Article
• Authors: Zolghadr, Ali; Kelley, Matthew D.; Sokhansefat, Ghazal; Moradian, Masoud; Sullins, Brianna; Ley, Tyler; Biernacki, Joseph J.
• Is Part Of: Bioresource technology. Volume 273(2019)
• Page Start: 16
• Page End: 24
• Publication Date: 2019-02
• Subjects: Biomass -- Microspheres -- Dynamic shrinkage -- Bio-char -- Pyrolysis; 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.2018.09.137
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: A method for production of manufactured biomass microspheres is introduced. The pyrolysis of the microspheres was shown to be the same as the parent materials. The volumetric shrinkage of the microspheres was found to be an intrinsic property. Shrinkage and weight loss were co-linear in the absence of secondary reaction. Abstract: A method for manufacturing biomass microspheres is introduced. Biomass microspheres between 100 and 400 µm in diameter were produced from crystalline cellulose, switchgrass, and tall fescue using spray drying. The biomass microspheres were characterized using X-ray computed tomography (XCT), thermal gravimetric analysis (TGA), and real-time optical imaging: density, pore structure, and size effects were studied. Dynamic shrinkage was video-captured using a CMOS camera and parallel (paired, side-by-side) weight loss experiments were performed using TGA. The combined data was used to correlate the extent of pyrolysis to gross morphological change (shrinkage). The results show that manufactured biomass microspheres are uniform and that, in the absence of heat and mass transport limitations, pyrolysis shrinkage is an intrinsic property dependent only upon the final processing temperatures.