A5073295930- Thermochemical Biomass Conversion Processes
- Biofuel production and bioconversion
- Lignin and Wood Chemistry
- Food Chemistry and Fat Analysis
- Combustion and flame dynamics
- Zeolite Catalysis and Synthesis
- Advanced Thermodynamics and Statistical Mechanics
- Carbon Dioxide Capture Technologies
- Granular flow and fluidized beds
- Biodiesel Production and Applications
- Food Drying and Modeling
- Process Optimization and Integration
- Rheology and Fluid Dynamics Studies
- Microencapsulation and Drying Processes
- Chemical Looping and Thermochemical Processes
- Natural Products and Biological Research
- Energy and Environment Impacts
- Catalysis for Biomass Conversion
- Mineral Processing and Grinding
- Microbial Metabolic Engineering and Bioproduction
- Phytochemicals and Antioxidant Activities
- Subcritical and Supercritical Water Processes
- Industrial Gas Emission Control
- Thermal and Kinetic Analysis
- Coal and Its By-products
Universidad Nacional de Colombia
2016-2025
Universidad de Medellín
2018-2021
Municipality of Medellín
2019
Universidad de Antioquia
2005
Telefonica Research and Development
2005
Universidad Pontificia Bolivariana
1993
Four principal intra-particle phenomena occur in a highly concerted manner during the pyrolysis of lignocellulosic materials: heat transfer, mass chemical reactions, and phase changes.
For the calcination of CaCO 3 under CO 2 ‐containing atmospheres, a mathematical model taking into account ‐catalyzed sintering CaO product layer is developed. In this model, modified shrinking core coupled with population balance‐based model. By comparing predictions experimental data, it found that strongly affects overall rate both at high temperature and partial pressure, since these conditions densification considerably reduces effective diffusivity within layer. It observed for large...
Pyrolytic lignin is a fraction of pyrolysis oil that contains wide range phenolic compounds can be used as intermediates to produce fuels and chemicals. However, the characteristics raw structure make it difficult establish mechanism determine pyrolytic structures. This study proposes dimer, trimer, tetramer structures based on their relative thermodynamic stability for hardwood model in pyrolysis. Different configurations oligomers were evaluated by varying positions guaiacyl (G) syringyl...
Artificial Neural Networks (ANNs) have been successfully applied to predict various parameters in extrusion processes. However, few studies were found that demonstrated their use predicting the pressure profile along a single-screw extruder, and these studies, motor current demand melt temperature not used as input variables. In this study, Feedforward (FANNs) extruder. The layer variables tested included demand, temperature, screw speed, die restriction, while output evaluated four...
Energy and production efficiency are critical for achieving sustainability competitiveness in polymer processing plants. A system with high energy performance enhances productivity while reducing greenhouse gas emissions. While Monitoring Targeting (M&T) methodologies widely used control Accounting Centers (EACs), they do not provide a diagnostic framework. The Gap Method (EGM), introduced 2018, addresses this gap by identifying the origin magnitude of inefficiencies through hierarchical...
Abstract This work analyzed the effect of infrared roasting at 100, 150, and 200°C on main physical chemical changes cocoa. Raw roasted cocoa were using Brunauer–Emmett–Teller, Fourier transform spectroscopy, modulated differential scanning calorimetry (MDSC), thermogravimetric analysis (TGA), SPME, GC‐MS. Using MDSC, fusion fat around 35°C, desolvation water volatile compounds identified. TGA detected loss mass various groups compounds, including those present pre‐roasting generated during...
The theory of nonlocal isothermal hydrodynamics near a solid object derived microscopically in the study by Camargo et al. [J. Chem. Phys. 148, 064107 (2018)] is considered under conditions that flow fields are macroscopic character. We show limit flows, simple pillbox argument implies reversible and irreversible forces exerts on fluid can be represented terms boundary conditions. In this way, from underlying microscopic dynamics fluid-solid system. These impenetrability condition Navier...
The co-hydrotreatment of pyrolysis bio-oils and vegetable oils could facilitate the integration bioderived fuels into existing fuel infrastructures without significant modifications. Co-hydrotreatment studies with different PL/WCO blend ratios (0, 10, 20, 30, 40 wt %) were conducted over NiMo/γ-Al2O3 catalyst. coke formation value for WCO was 0.7 % ranged between 1.5 2.5 increase pyrolytic lignin in blend. data suggest that is formed from both sugar- lignin-derived oligomers since yield...
Abstract In the present work drying of blueberry (mortiño) leaves ( Vaccinium meridionale‐Swartz ) was done using a hybrid equipment with infrared and normal microwave drying. During tests there record moisture content versus time; samples were taken during time to analyze total phenol (PT) content, FRAP assay catechin measures by HPLC‐DAD. The PT analysis shows that its in dry blueberries, increased 12 times more than infrarred While blueberries antioxidant capacity nine process comparison...
Coffee husks represent about 12 wt % of coffee grains, generating a significant impact on the environment because its inadequate disposal. In Colombia, this waste presents an energy resource opportunity equivalent to over 49,106 TJ per year. However, several challenges related type biomass, such as moisture content, irregular shapes, and low bulk density, make use difficult in current burners. Thus, paper, combustion husk pellets was studied detail design high-efficiency burner produce for...