A5000513364- Thermochemical Biomass Conversion Processes
- Coal and Its By-products
- Energy and Environment Impacts
- Environmental remediation with nanomaterials
- Chemical Looping and Thermochemical Processes
- Subcritical and Supercritical Water Processes
- Municipal Solid Waste Management
- Coal Combustion and Slurry Processing
- Iron and Steelmaking Processes
- Catalytic Processes in Materials Science
- Graphite, nuclear technology, radiation studies
- Catalysts for Methane Reforming
- Material Properties and Applications
- Healthcare and Environmental Waste Management
- Graphene research and applications
- Pharmaceutical and Antibiotic Environmental Impacts
- Concrete and Cement Materials Research
- Toxic Organic Pollutants Impact
- Atmospheric chemistry and aerosols
- Anaerobic Digestion and Biogas Production
- Cyclone Separators and Fluid Dynamics
- Biofuel production and bioconversion
- Lignin and Wood Chemistry
- Polymer Foaming and Composites
- Clay minerals and soil interactions
University of Chemistry and Technology, Prague
2013-2024
Czech Academy of Sciences, Institute of Chemical Process Fundamentals
2011
Conventional methods of sewage sludge disposal are often limited by their environmental impact and economic demands. Pyrolysis has been studied as a viable method for transformation into usable products. Pyrolytic products may have various uses, complex characteristics shall be described to assess potential safe utilization. Here, we slow pyrolysis stabilized in fixed bed reactor at 400–800 °C describe the composition gas condensate fraction. We found that elemental was practically...
Abstract Pyrolysis is one method for treating sewage sludge, particularly in remote areas or decentralised systems. The end product of pyrolysis, sludge-char, can serve as a soil improver. However, there lack comprehensive data on the organic pollutants’ behaviour sludge-char. In our work, we focused per- and polyfluoroalkyl substances (PFASs). Sludge was pyrolyzed at 200–700 °C to determine minimum safe temperature effective PFASs removal. It important note that may not only be mineralized...
Heavy metal phytoextraction by growing energy crops such as flax could be a promising approach for remediation of brownfields with benefits. The present paper deals (40 wt %) and hardwood (60 cogasification particular focus on the distribution heavy metals to both solid gaseous gasification products. blended fuel was gasified steam in fluidized bed gasifier at about 850 °C biomass ratio 1.01 kg kg–1. Concentrations selected (Cd, Cu, Ni, Pb, Zn) were determined ash, cyclone downstream...
Sewage sludge incineration in a fluidized bed is considered to be one of the most suitable ways sewage disposal. This process reduces volume waste and causes destruction organic contaminants such as POPs, pharmaceuticals, other compounds with endocrine-disrupting potential. Oxygen-enriched air combustion oxy–fuel can increase efficiency, reduce amount flue gas, make possible CO2 capture more effective. However, influence medium composition has not yet been thoroughly investigated case...
Pyrolysing agricultural crop residues and other biomass constitutes a newer method of transforming often difficult, waste materials into novel type soil amendment/additive. Simultaneously, this process also makes it possible to exploit part the energy released in production. Biochar, viewed as solid product pyrolysis, is remarkable, porous material, rich carbon. Two residues, such wheat barley straw, were selected for experimental studies. The results indicate that practical temperature...
The chloridization rates of sodium hydrogen carbonate calcines were determined using both a differential fixed-bed reactor and an integral fixed-bed, flow-through at ambient pressure temperature 500 °C. In the course reaction with chloride gas, monoclinic or hexagonal Na2CO3 was transformed into cubic NaCl. expansion volume solid phase, because reaction, described by means simple structural model. reacted solids remained quite porous (∼29%), having decreased from initial porosity 45%. Up to...
Calcined dolomitic limestone mixed with silica sand in a fluidized bed can catalytically enhance the gasification of woody biomass. The lime is prone to attrition and carry over from reactor deactivation caused by pore sintering; therefore, it has be replenished continuously or periodically maintain catalytic activity bed. main aim this paper was explore level decrease if not estimate critical period for its top-up. Wood chips were gasified first (1080 g), obtain background data without...
Huge amounts of agricultural residues or wastes represent an interesting lignocellulosic material which can be used for energy recovery by pyrolysis as alternative to incineration. Together with the production, biochar (solid residue), advantage a soil conditioner other applications such adsorbents, supporting principles circular economy. Here we studied effect torrefaction and temperature from 250 700 °C on composition properties gas four types agrowaste-derived materials: sunflower harvest...
Prior to sewage sludge application agricultural soil, the should be treated appropriately suppress its negative features like content of microorganic pollutants or leaching heavy metals.Pyrolysis has been investigated as one way producing sludge-derived biochar (solid pyrolysis residue) which is stable and less toxic than sludge.A significant amount heat must provided process due endothermic character.To make economically energy efficient, necessary can obtained by combustion primary...
As part of a project dealing with the material use waste plastics processed by pyrolysis, method for purification primary pyrolysis gas at temperatures above dew point condensing components was proposed. In order to avoid loss liquid products, two procedures have been proposed study this issue. The first procedure consists in separating condensate from permanent gases and its subsequent evaporation introduction into high-temperature reactor where takes place. second used same equipment, but...
Per- and polyfluoroalkyl substances (PFASs) are among the pollutants of interest in sewage sludge . Their content has already been documented, but their behaviour during pyrolysis is poorly understood. In this paper, samples artificially contaminated sea sand with PFASs pyrolysed at 200 to 700 °C. We aim determine how different PFAS behave temperatures minimum temperature required for removal from solid product The actual varied according type PFAS. More than 99.0 % studied were removed when...