A model of non-catalytic fast fluidized bed pyrolysis biomass has been developed with the aim investigating relevance secondary heterogeneous reactions between primary products decomposition and char accumulated in bed. The fate extent holdup pyrolyzer have modeled by considering entrainment elutriation particles, attrition, as well drain/regeneration. kinetics pyrolitic is according to a semi-...

The results of micro-Raman scattering measurements performed on three different “graphitic” materials: micro-structured disks of highly oriented pyrolytic graphite, graphene multi-layers thermally decomposed from carbon terminated surface of 4H-SiC and an exfoliated graphene monolayer are presented. Despite its multi-layer character, most parts of the surface of the graphitized SiC substrates s...

On-line detection of benzene and polycyclic aromatic hydrocarbons (PAH) has been performed by using a time of flight mass spectrometer (TOF-MS), which has been designed and implemented for obtaining in real time complete mass spectra from molecules of few mass units up to thousands of mass units (corresponding to nanometric dimensions). The flames have been fed with different C/O ratios under a...

Microplastics (MPs) largely occur in aquatic ecosystems due to degradation of larger plastics or release from MP-containing products. Due the hydrophobic nature and large specific surface MPs, other contaminants, such as polycyclic aromatic hydrocarbons (PAHs), can potentially sorb onto MPs. Several studies have addressed potential impact MPs vectors PAHs for organisms. Therefore role sorbents ...

The mudflat area in the southern Iraq is untapped and there are few studies about it, this study attempts to determine concentration of aromatic hydrocarbons (PAHs) region, addition their sources assess quality pollution by PPI. Total ranged between (89.8-21.9) µg/g dw with mean value (44.62) dw, among 16 10 these compounds dominant all station as fallow: Benzo(B) (14.46-4.743) Benzo [G,H,I] wa...

BACKGROUND Debate about the health implications of using smokeless tobacco products (STPs) has prompted considerable interest in characterising their levels of toxic and carcinogenic components. In the present study seventy smokeless tobacco products from the US and Sweden, categorized as chewing tobacco, dry and moist snuff, hard and soft pellets, plug, and loose and portion snus, were analyse...

Thermal transport in subducted slabs and mantle critically influences their thermo-chemical evolution dynamics, where the thermal conductivity controls magnitude of conductive heat transfer. Here we investigate high-pressure conductivities stishovite new-hexagonal-aluminous (NAL) phase, two major slab minerals shallow lower mantle, impacts on dynamics. Pure Al-bearing exhibit 60–70 30–40 W m−1 ...