53 research outputs found
Application of NIRS to the Direct Measurement of Carbonization in Torrefied Wheat Straw Chars
Impact of process conditions on the density and durability of wheat, oat, canola, and barley straw briquettes
Briquetting characteristics of woody and herbaceous biomass blends: Impact on physical properties, chemical composition, and calorific value
Effect of particle size, die rotary speed and amount of urea on physical properties of the produced pellet
Characterization and quality analysis of wood pellets: effect of pelletization and torrefaction process variables on quality of pellets
Optimization of Pelleting and Infrared-Convection Drying Processes of Food and Agricultural Waste Using Response Surface Methodology (RSM)
Fuel property enhancement of lignocellulosic and nonlignocellulosic biomass through torrefaction
Surface oxygenation of biochar through ozonization for dramatically enhancing cation exchange capacity
Abstract Background Biochar cation exchange capacity (CEC) is a key property that is central to biochar environmental applications including the retention of soil nutrients in soil amendment and removal of certain pollutants in water-filtration applications. Results This study reports an innovative biochar-ozonization process that dramatically increases the CEC value of biochars by a factor of 2. The ozonized biochars also show great improvement on adsorption of methylene blue by as much as a factor of about 5. In this study, biochar samples treated with and without ozone were analyzed by means of pH and CEC assays, water field capacity measurement, elemental analysis, methylene blue adsorption, and Raman spectroscopy. Gaseous products’ analyses were carried out using an online universal gas analyzer over the duration of ozone treatments, and temperature changes were monitored using a thermal imaging camera. The results demonstrate a doubling of CEC with a concomitantly large drop in pH of the ozonized biochar compared with the untreated sample, brought about by the creation of acidic oxygen-functional groups on biochar surface, which may represent a significant progress toward the viability of employing biochar as a soil amendment for sustainability on Earth. Conclusions This biochar-ozonization process technology has the potential to effectively convert conventional biochars into surface-oxygenated products with dramatically higher CEC values
An LCA-based evaluation of biomass to transportation fuel production and utilization pathways in a large port’s context
- …