A5108104807- Thermochemical Biomass Conversion Processes
- Lignin and Wood Chemistry
- Biofuel production and bioconversion
- Coal and Its By-products
- Subcritical and Supercritical Water Processes
- Iron and Steelmaking Processes
- Thermal and Kinetic Analysis
- Zeolite Catalysis and Synthesis
- Fire dynamics and safety research
- Biodiesel Production and Applications
- Wood Treatment and Properties
- Coal Combustion and Slurry Processing
- Graphite, nuclear technology, radiation studies
Universidad Nacional de Colombia
2014-2021
Washington State University
2017
Pyrolysis of thin films cellulose was performed at five pressures from 4 mbar (vacuum) to 1 bar 500 °C in a modified pyroprobe captive sample reactor designed minimize gas-phase secondary reactions. Known molecule products were identified and quantified by gas chromatography (GC), GC/mass spectrometry (MS), high-performance liquid chromatography, yields calculated. Vacuum allowed the evaporation cellobiosan promoted release heavy oligosaccharides thermal ejection (cellotriosan, etc.),...
Thin films (∼115 μm thick) of milled wood lignin from hybrid poplar and acid-washed were pyrolyzed at 500 °C ∼55 °C/s five pressures (4, 250, 500, 750, 1000 mbar) to determine the impact secondary liquid intermediate reactions on product distribution. For both extracted wood, pressure had a significant effect distribution for thin film pyrolysis between 4 mbar. lignin, lowering mbar reduced char yield 36 23% enhanced production large cluster pyrolytic lignin. However, did not dramatically...
Currently, there are many studies that analyze the co-gasification or co-combustion of biomass with coal in fluidized-bed reactors. Mixing these two materials takes advantage particle segregation as a result differences density, shape, and size; this phenomenon requires due attention because it can lead to reactor operation issues. Some common problems seen gap flow, plug large bubbles reduce mass energy transport, thus lowering quality syngas product. In study, we found mixing palm kernel...
With the existing analytical pyrolysis systems (e.g., thermogravimetric analysis (TGA), pyroprobe, drop tube furnace, etc.) that are available on market, it is not possible to monitor real temperature of a sample or visualize transformation solids. Furthermore, typical preparation methods using powder) result in poor mass and heat transfer, because large thickness explosion particles during heating regime. To study address these problems, (i) new experimental setup was designed allow...
Wet-ground empty fruit bunches (EFBs), dry-ground EFB, and pelletized EFB were gasified in a laboratory-scale updraft fixed-bed reactor at differing temperatures equivalent ratios (ERs) between 0.19 0.78 to evaluate the performance quality of syngas under autothermal operating conditions. In addition, theoretical estimation key indicator ashes on gasification process was obtained. The results show that for ERs > 0.4 condition achieved pretreatments with EFBs, T 700 °C. With wet this is any...