In situ monitoring of hydrogen loss during pyrolysis of wood by neutron imaging

Ossler, Frederik; Santodonato, Louis J.; Warren, Jeffrey M.; Finney, Charles E. A.; Bilheux, Jean -Christophe; Mills, Rebecca A.; Skorpenske, Harley D.; Bilheux, Hassina Z.

doi:10.1016/j.proci.2018.07.051

Title: In situ monitoring of hydrogen loss during pyrolysis of wood by neutron imaging

Full Record
Other Related Research

Abstract

Hydrogen is an element of fundamental importance for energy but hard to quantify in bulk materials. Neutron radiography was used to map in situ loss of elemental hydrogen from beech tree wood samples during pyrolysis. The samples consisted of three wood cylinders (finished dowel or cut branch) of approximately 1 cm in length. The samples were pyrolyzed under vacuum in a furnace vessel that was placed inside a cold neutron imaging beamline using a temperature ramp of 5 °C/min from ambient up to 400 °C. Neutron radiographs with exposures of 30 s were sequentially recorded with a charge-coupled device over the course of the experiment. Relative absorbance/scattering of the neutron beam by each sample was based on intensity (or brightness) values as a function of pixel position. The much larger neutron cross section for hydrogen compared to carbon and oxygen enables almost direct conversion of neutron attenuation into sample hydrogen content for each time step during the pyrolysis experiment. Target and vessel temperatures were recorded concurrently with collection of the radiographs so that changes could be directly correlated to different states of pyrolysis. The most visible change appeared at the initial phase of the 400 °C plateau as evidenced bymore »« less

Authors:

Ossler, Frederik ^[1];

^[2];

^[3];

^[3]; Mills, Rebecca A. ^[3]; Skorpenske, Harley D. ^[3];

^[3]

Lund Univ., Lund (Sweden)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Advanced Research Systems, Macungie, PA (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Publication Date:: Fri Sep 07 00:00:00 EDT 2018

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Biological and Environmental Research (BER)

OSTI Identifier:: 1524893

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: Proceedings of the Combustion Institute

Additional Journal Information:: Journal Volume: 37; Journal Issue: 2; Journal ID: ISSN 1540-7489

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 08 HYDROGEN; 09 BIOMASS FUELS; Neutron imaging; Biomass; Pyrolysis

Citation Formats


                    Ossler, Frederik, Santodonato, Louis J., Warren, Jeffrey M., Finney, Charles E. A., Bilheux, Jean -Christophe, Mills, Rebecca A., Skorpenske, Harley D., and Bilheux, Hassina Z. In situ monitoring of hydrogen loss during pyrolysis of wood by neutron imaging.  United States: N. p., 2018. 
Web.  doi:10.1016/j.proci.2018.07.051.

Copy to clipboard


                    Ossler, Frederik, Santodonato, Louis J., Warren, Jeffrey M., Finney, Charles E. A., Bilheux, Jean -Christophe, Mills, Rebecca A., Skorpenske, Harley D., & Bilheux, Hassina Z. In situ monitoring of hydrogen loss during pyrolysis of wood by neutron imaging.  United States.  https://doi.org/10.1016/j.proci.2018.07.051

Copy to clipboard


                    Ossler, Frederik, Santodonato, Louis J., Warren, Jeffrey M., Finney, Charles E. A., Bilheux, Jean -Christophe, Mills, Rebecca A., Skorpenske, Harley D., and Bilheux, Hassina Z. Fri .  
"In situ monitoring of hydrogen loss during pyrolysis of wood by neutron imaging".  United States.  https://doi.org/10.1016/j.proci.2018.07.051.  https://www.osti.gov/servlets/purl/1524893.

Copy to clipboard


                    
@article{osti_1524893,

  title        = {In situ monitoring of hydrogen loss during pyrolysis of wood by neutron imaging},

  author       = {Ossler, Frederik and Santodonato, Louis J. and Warren, Jeffrey M. and Finney, Charles E. A. and Bilheux, Jean -Christophe and Mills, Rebecca A. and Skorpenske, Harley D. and Bilheux, Hassina Z.},

  abstractNote = {Hydrogen is an element of fundamental importance for energy but hard to quantify in bulk materials. Neutron radiography was used to map in situ loss of elemental hydrogen from beech tree wood samples during pyrolysis. The samples consisted of three wood cylinders (finished dowel or cut branch) of approximately 1 cm in length. The samples were pyrolyzed under vacuum in a furnace vessel that was placed inside a cold neutron imaging beamline using a temperature ramp of 5 °C/min from ambient up to 400 °C. Neutron radiographs with exposures of 30 s were sequentially recorded with a charge-coupled device over the course of the experiment. Relative absorbance/scattering of the neutron beam by each sample was based on intensity (or brightness) values as a function of pixel position. The much larger neutron cross section for hydrogen compared to carbon and oxygen enables almost direct conversion of neutron attenuation into sample hydrogen content for each time step during the pyrolysis experiment. Target and vessel temperatures were recorded concurrently with collection of the radiographs so that changes could be directly correlated to different states of pyrolysis. The most visible change appeared at the initial phase of the 400 °C plateau as evidenced by strong hydrogen loss and primarily diametric shrinking of the samples. In conclusion, the loss of elemental hydrogen between initial and final states of pyrolysis was estimated to be about 70%.},

  doi          = {10.1016/j.proci.2018.07.051},

  journal      = {Proceedings of the Combustion Institute},

  number       = 2,

  volume       = 37,

  place        = {United States},

  year         = {Fri Sep 07 00:00:00 EDT 2018},

  month        = {Fri Sep 07 00:00:00 EDT 2018}

}

Copy to clipboard

Journal Article:

Free Publicly Available Full Text

Accepted Manuscript (DOE)

Publisher's Version of Record

https://doi.org/10.1016/j.proci.2018.07.051

Other availability

Search WorldCat to find libraries that may hold this journal

Citation Metrics:

Cited by: 4 works

Citation information provided by
Web of Science

Save / Share:

Export Metadata

Save to My Library

Similar Records in DOE PAGES and OSTI.GOV collections:

Detailed modeling of hydrogen release and particle shrinkage during pyrolysis of inhomogeneous wood

Journal Article Mousavi, Seyed Morteza ; Ossler, Frederik ; Finney, Charles E. A. ; ... - Proceedings of the Combustion Institute

Hydrogen release during pyrolysis of woody biomass is studied considering anisotropicity and inhomogeneity of wood structure. A new anisotropic shrinkage model is proposed based on the decomposition of main wood constituents, i.e., cellulose, hemicellulose, and lignin. The new shrinkage model can predict the temporal evolution of the wood structure, and the differences between axial and radial shrinkage during pyrolysis. The model agrees very well with several experimental data from the literature. Based on particle temperature during conversion, the pyrolysis is partitioned into four stages, and the hydrogen release and H₂ formation from each stage are investigated. Stage (IV) of pyrolysis,more »« less
https://doi.org/10.1016/j.proci.2022.07.108

Full Text Available
Effects of physical and chemical parameters on the tar yield during rapid pyrolysis of wood

Conference Nik-Azar, M ; Hajaligol, M R ; Sohrabi, M

Effects of temperature (200-1000{degrees}C), solid residence time (0-30 sec), heating rate (100 to 10,000{degrees}C/s), particle size (50 to 500 {mu}m), and mineral matters on the yield and formation rate of tar from rapid pyrolysis of beech-wood under 1 atm helium pressure were studied. Wood particles were pyrolyzed for known and independently selectable temperature, time, nominal heating rates in an electrical screen beater reactor; and the tar yield was measured as a function of temperature for every parameter tested. The tar yield from pyrolysis of beech-wood was accounted for up to 70% of the original wood above 400{degrees}C. Due to themore »« less
Dynamics of hydrogen loss and structural changes in pyrolyzing biomass utilizing neutron imaging

Journal Article Ossler, Frederik ; Finney, Charles E. A. ; Warren, Jeffrey M. ; ... - Carbon

We present results from neutron-imaging studies of slow, vacuum pyrolysis of beech, poplar and conifer wood, and pelletized biomass from room temperature up to 1000 °C. A detailed and quantitative method to extract 2D (in situ neutron radiography, NR) and 3D (ex situ neutron computed tomography, NCT) information on structural transformation and elemental hydrogen content has been developed. NCT and X-ray tomography (XCT) experiments on a carbonized beech twig permitted comparison of the spatial distribution of hydrogen, better sensed by NCT, and carbon, oxygen, and heavier elements, better sensed by XCT. We have developed a methodology to directly compare structuremore »« less
https://doi.org/10.1016/j.carbon.2020.11.060
Experimental and theoretical investigation of heat and mass transfer processes during wood pyrolysis

Journal Article Park, Won Chan ; Atreya, Arvind ; Baum, Howard R - Combustion and Flame

Thermal decomposition of 25.4 mm diameter dry wood spheres is studied both experimentally and theoretically. Wood spheres were pyrolyzed in a vertical tube furnace at temperatures ranging from 638 K to 879 K. Mass loss and temperatures of the sample were measured during pyrolysis. Center temperature measurements showed two distinct thermal events consisting of sequential endothermic and exothermic reactions. A numerical investigation of these endo/exothermic reactions using various pyrolysis kinetics models was conducted to determine the pyrolysis mechanism and the heats of the pyrolysis reactions. A comparison of the experimental and numerical results showed that (i) Contrary to the suggestionsmore »« less
https://doi.org/10.1016/J.COMBUSTFLAME.2009.10.006
Dissolved pyrogenic carbon leaching in soil: Effects of soil depth and pyrolysis temperature

Journal Article Santos, Fernanda ; Bird, Jeffrey A. ; Asefaw Berhe, Asmeret - Geoderma

We report Pyrogenic organic carbon (PyC) is found in soils as a heterogeneous mixture of thermally altered plant residues that range in their susceptibility to losses via mineralization, leaching, and erosion. Leaching of PyC as DOC (DPyC) within the soil profile is likely influenced by the chemical composition of solid PyC and the dominant soil processes and properties at a particular depth. Here we report the results of a 2-year laboratory decomposition and leaching study designed to investigate the interactive effects of pyrolysis temperature levels (no pyrolysis, 300 °C, and 450 °C) and soil depth (surface soil, 0–10 cm depth;more »« less
https://doi.org/10.1016/j.geoderma.2022.116011

Full Text Available

Similar Records