Topic
Pyrolysis
About: Pyrolysis is a research topic. Over the lifetime, 34918 publications have been published within this topic receiving 833524 citations.
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TL;DR: A series of nitrogen-doped porous carbons are prepared through KOH activation of a nonporous nitrogen-enriched carbon which is synthesized by pyrolysis of the polymerized ethylenediamine and carbon tetrachloride as discussed by the authors.
332 citations
TL;DR: It is proposed that intra-charcoal mass transport may be influenced by structural rearrangement of the solid, in addition to molecular diffusion, which results in the pathway of sorption being different than the pathways of desorption and which leads to entrapment of some adsorbate as the polyaromatic scaffold collapses during desor adaptation.
Abstract: Charcoal is found in water, soil, and sediment where it may act as a sorbent of organic pollutants. The sorption of organic compounds to natural solids often shows hysteresis. The purpose of this study was to determine the source of pronounced hysteresis that we found in the sorption of a hydrophobic compound (benzene) in water to a maple-wood charcoal prepared by oxygen-limited pyrolysis at 673 K. Gas adsorption (N2, Ar, CO2), 13C NMR, and FTIR show the charcoal to be a microporous solid composed primarily of elemental (aromatic) C and secondarily of carboxyl and phenolic C. Nonlocal density functional theory (N2, Ar) and Monte Carlo (CO2) calculations reveal a porosity of 0.15 cm3/g, specific surface area of 400 m2/g, and appreciable porosity in ultramicropores <10 A. Benzene sorption−desorption conditions were chosen to eliminate artificial causes of hysteresis (rate-limiting diffusion, degradation, colloids effect). Charcoal sorbed up to its own weight of benzene at ∼69% of benzene water solubility. S...
331 citations
TL;DR: In this article, pyrolysis temperatures up to 720 °C and at heating rates between 5 and 80 °C min−1 were used to determine the composition and properties of the derived gases and oils.
331 citations
TL;DR: In this paper, fast pyrolysis of safflower seed ( Carthamus tinctorius L.) was investigated with the aim to study the product distribution and their chemical compositions and to identify optimum process conditions for maximizing the bio-oil yield.
330 citations
TL;DR: In this paper, the authors used a TGA coupled with a mass spectrometer to study pyrolysis of 34 Chinese coals and found that the mass loss registered in TGA during temperature programmed heating is attributed mainly to devolatilization of fragments generated from cleavage of covalent bonds.
330 citations