This paper presents the kinetic modeling of biomass gasification in bubbling fluidized bed (BFB) gasifiers and optimization methods to maximize products. The model was developed based on two-phase fluidization theory. In this work, reaction kinetics, hydrodynamic conditions, convective diffusion effect, thermal cracking tar kinetics were considered model. coded MATLAB simulated. result depicted...

Biomass Chemical Looping Gasification, BCLG, is a promising technology that uses lattice oxygen instead of expensive gaseous for high quality syngas production without CO2 emissions. In this work, 55 h continuous operation in 1.5 kWth BCLG unit using ilmenite as carrier and pine wood fuel reported. A new method controlling the used through control fed into air reactor was by first time with sat...

Waste-to-energy (WtE) incineration is an important technique in waste management systems and hierarchy. It used to treat approximately 63% of the European countries. The flue gas volumetric rate its composition are essential determine monitor emissions from plants. This paper presents two methodologies evaluate incinerators during design phase. first consists a set equations applicable Excel (c...

To strike a better balance between gas quality and production cost of biomass-based syngas, process for high-safety cost-effective syngas is designed studied, which takes advantage biomass O2-enriched air gasification with 40–70% O2 purity methanation synthesis. Based on the simulation data, evaluated from techno-economic aspects, including composition, higher heat value (HHV), upper lower expl...

One of the most appropriate methods for elimination of trace impurities in helium is cryogenic adsorption process. So, in this study design and construction of cryogenic adsorption helium purification system (3 Nm3.hr-1, 80 bar) carried out using activated carbon as adsorbent at 77K. To evaluation of adsorption dynamics and effect of pressure on elimination of trace impurities, helium purificat...

3He nanobubbles created by radioactive decay of tritium in palladium tritide are investigated after several years aging. Scanning Transmission Electron Microscopy Energy-Loss Spectroscopy (STEM-EELS) has been used to measure helium density from the K-edge around 23 eV. Helium densities were found between 20 and 140 (+/-30) He/nm3 corresponding nanobubble pressures range 0.1 3 (+/-0.2) GPa. Meas...

The aim of this work is to give representative data on polychlorinated dibenzo-p-dioxins (PCDD), polychlorinated dibenzofurans (PCDFs) and polychlorinated biphenyl (PCBs) from stack gas emissions of an urban solid waste management plant which has to comply with the limit of 0.1 ng I-TEQ/Nm3. In particular, the study is focused on 29 target compounds, the seventeen 2,3,7,8-PCDDs/Fs, four non-ort...

Gold nanorods that have an absorption band in the near-infrared region and a photothermal effect have been used as nanodevices for near-infrared imaging and thermal therapy. Choice of the optimal shape of gold nanorods which relates optical properties and in vivo biodistribution is important for their applications. In the present study, to investigate the relationship between the shape of gold ...