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Teixeira AR, Gantt R, Joseph KE, Maduskar S, Paulsen AD, Krumm C, Zhu C, Dauenhauer PJ. Spontaneous Aerosol Ejection: Origin of Inorganic Particles in Biomass Pyrolysis. CHEMSUSCHEM 2016; 9:1322-1328. [PMID: 27125341 DOI: 10.1002/cssc.201600112] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Indexed: 06/05/2023]
Abstract
At high thermal flux and temperatures of approximately 500 °C, lignocellulosic biomass transforms to a reactive liquid intermediate before evaporating to condensable bio-oil for downstream upgrading to renewable fuels and chemicals. However, the existence of a fraction of nonvolatile compounds in condensed bio-oil diminishes the product quality and, in the case of inorganic materials, catalyzes undesirable aging reactions within bio-oil. In this study, ablative pyrolysis of crystalline cellulose was evaluated, with and without doped calcium, for the generation of inorganic-transporting aerosols by reactive boiling ejection from liquid intermediate cellulose. Aerosols were characterized by laser diffraction light scattering, inductively coupled plasma spectroscopy, and high-speed photography. Pyrolysis product fractionation revealed that approximately 3 % of the initial feed (both organic and inorganic) was transported to the gas phase as aerosols. Large bubble-to-aerosol size ratios and visualization of significant late-time ejections in the pyrolyzing cellulose suggest the formation of film bubbles in addition to the previously discovered jet formation mechanism.
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Affiliation(s)
- Andrew R Teixeira
- Department of Chemical Engineering, University of Massachusetts Amherst, 686 North Pleasant Street, Amherst, MA, 01003, USA
| | - Rachel Gantt
- Department of Chemical Engineering, University of Massachusetts Amherst, 686 North Pleasant Street, Amherst, MA, 01003, USA
| | - Kristeen E Joseph
- Department of Chemical Engineering, University of Massachusetts Amherst, 686 North Pleasant Street, Amherst, MA, 01003, USA
- Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Ave. SE, Minneapolis, MN, 55455-0132, USA
| | - Saurabh Maduskar
- Department of Chemical Engineering, University of Massachusetts Amherst, 686 North Pleasant Street, Amherst, MA, 01003, USA
- Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Ave. SE, Minneapolis, MN, 55455-0132, USA
| | - Alex D Paulsen
- Department of Chemical Engineering, University of Massachusetts Amherst, 686 North Pleasant Street, Amherst, MA, 01003, USA
- Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Ave. SE, Minneapolis, MN, 55455-0132, USA
| | - Christoph Krumm
- Department of Chemical Engineering, University of Massachusetts Amherst, 686 North Pleasant Street, Amherst, MA, 01003, USA
- Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Ave. SE, Minneapolis, MN, 55455-0132, USA
| | - Cheng Zhu
- Department of Chemical Engineering, University of Massachusetts Amherst, 686 North Pleasant Street, Amherst, MA, 01003, USA
- Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Ave. SE, Minneapolis, MN, 55455-0132, USA
| | - Paul J Dauenhauer
- Department of Chemical Engineering, University of Massachusetts Amherst, 686 North Pleasant Street, Amherst, MA, 01003, USA.
- Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Ave. SE, Minneapolis, MN, 55455-0132, USA.
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