Dynamics of hydrogen loss and structural changes in pyrolyzing biomass utilizing neutron imaging
Source abstract
Abstract
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 structure and hydrogen-loss dynamics measured using neutron imaging with thermogravimetric analysis and differential thermogravimetry and thus can better understand the correlations between hydrogen and carbon release dynamics. While the methodology has been developed for the carbonization of biomass, we expect that it could be applied to in situ dynamic monitoring of other hydrogenous reacting systems with the appropriate spatial and temporal scales.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Thermochemical Biomass Conversion Processes · Nuclear Physics and Applications · Hydrocarbon exploration and reservoir analysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (38)
Show source-provided references
1. Top ten fundamental challenges of biomass pyrolysis for biofuels10.1039/c2ee21679e ↗
2. Reaction mechanisms and multi-scale modelling of lignocellulosic biomass pyrolysis10.1016/j.pecs.2015.10.002 ↗
3. In situ monitoring of hydrogen loss during pyrolysis of wood by neutron imaging10.1016/j.proci.2018.07.051 ↗
4. Characterization and prediction of biomass pyrolysis products10.1016/j.pecs.2011.01.001 ↗
5. Lakeisha walker, the CG-1D neutron imaging beamline at the Oak Ridge national laboratory high flux isotope reactor10.1016/j.phpro.2015.07.015 ↗
6. The CG1 instrument development test station at the high flux isotope reactor10.1016/j.nima.2010.06.213 ↗
7. Natural genetic variability reduces recalcitrance in poplar10.1186/s13068-016-0521-2 ↗
8. Neutron imaging analysis using jupyter Python notebook
9. Schneider · Nat. Methods · 2012 · 9 · 67110.1038/nmeth.2089 ↗
10. TomoPy: a framework for the analysis of synchrotron tomographic data10.1107/S1600577514013939 ↗
11. Amira: A highly interactive system for visual data analysis10.1016/B978-012387582-2/50040-X ↗
12. Neutron scattering lengths and cross sections10.1080/10448639208218770 ↗
13. In-situ neutron imaging of hydrogenous fuels in combustion generated porous carbons under dynamic and steady state pressure conditions10.1016/j.carbon.2017.02.025 ↗
14. CHN microanalysis – a technique for the 21st century?
15. Zeiss Xradia 610 and 620 Versa, https://www.zeiss.com/microscopy/int/products/x-ray-microscopy/zeiss-xradia-610-and-620-versa.html, accessed 2020-06-30..
16. Form factor, attenuation, and scattering tables
17. Rowe · 1979
18. Automated medical image segmentation techniques10.4103/0971-6203.58777 ↗
19. Segmentation of biological images containing multitarget labeling using the jelly filling framework
20. New approaches to measuring biochar density and porosity10.1016/j.biombioe.2014.03.059 ↗
21. A novel method for kinetics analysis of pyrolysis of hemicellulose, cellulose, and lignin in TGA and macro-TGA10.1039/C5RA02715B ↗
22. The niobium–hydrogen system10.1016/0022-5088(60)90029-1 ↗
23. On the niobium–hydrogen and tantalum–hydrogen systems10.1016/0022-5088(68)90147-1 ↗
24. Effects of ring–porous and diffuse–porous stem wood anatomy on the hydraulic parameters used in a water flow and storage model10.1093/treephys/27.1.43 ↗
25. Gas diffusion through wood: implications for oxygen supply10.1007/s00468-005-0010-x ↗
26. Wood formation in trees10.1104/pp.010816 ↗
27. Lignin exhibits recalcitrance-associated features following the consolidated bioprocessing of populus trichocarpa natural variants
28. In-depth investigation of biomass pyrolysis based on three major components: hemicellulose, cellulose and lignin10.1021/ef0580117 ↗
29. A study of lignocellulosic biomass pyrolysis via the pyrolysis of cellulose, hemicellulose and lignin10.1016/j.jaap.2013.10.013 ↗
30. Modeling chemical and physical processes of wood and biomass pyrolysis10.1016/j.pecs.2006.12.001 ↗
31. Compositional variability of lignin in biomass
32. Structural characterization of wheat straw lignin as revealed by analytical pyrolysis, 2D-NMR, and reductive cleavage methods10.1021/jf301002n ↗
33. Effects of pyrolysis parameters on hydrogen formations from biomass: a review10.1039/c3ra43972k ↗
34. The influence of temperature and heating rate on the slow pyrolysis of biomass10.1016/0960-1481(96)00006-7 ↗
35. Vacuum pyrolysis of softwood and hardwood biomass: comparison between product yields and bio-oil properties10.1016/j.jaap.2006.05.003 ↗
36. Lignocellulosic biomass pyrolysis mechanism: a state-of-the-art review10.1016/j.pecs.2017.05.004 ↗
37. Properties of biochar10.1016/j.fuel.2017.12.054 ↗
38. The densification of bio-char: effect of pyrolysis temperature on the quality of the pellets10.1016/j.biortech.2015.10.077 ↗