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: In this paper, two Kraft lignins were fast pyrolyzed in the absence and presence of HZSM-5 in a Curie-point pyrolynzer.
Abstract: Catalytic fast pyrolysis (CFP) of Kraft lignins with HZSM-5 zeolite for producing aromatics was investigated using analytical pyrolysis methods. Two Kraft lignins were fast pyrolyzed in the absence and presence of HZSM-5 in a Curie-point pyrolyzer. Without the catalyst, fast pyrolysis of lignin predominantly produced phenols and guaiacols that were derived from the subunits of lignin. However, the presence of HZSM-5 changed the product distribution dramatically. As the SiO2/Al2O3 ratio of HZSM-5 decreased from 200 to 25 and the catalyst-to-lignin ratio increased from 1 to 20, the lignin-derived oxygenates progressively decreased to trace and the aromatics increased substantially. The aromatic yield increased considerably as the pyrolysis temperature increased from 500°C to 650°C, but then decreased with yet further increase of pyrolysis temperature. Under optimal reaction conditions, the aromatic yields were 2.0 wt.% and 5.2 wt.% for the two lignins that had effective hydrogen indexes of 0.08 and 0.35.
169 citations
TL;DR: In this paper, a thermogravimetric analyser was applied for the temperature range from 300 to 450 °C and an entrained flow reactor was used for measurements in the temperature ranges from 450 to 600 °C, the kinetic expression that describes the mass loss of sawdust due to pyrolysis was assumed to be of a single first-order in the unconverted wood.
169 citations
TL;DR: The results of the investigations into the elucidation of the chemical structure of moieties responsible for the blue and green luminescence of CDs derived from the microwave-assisted pyrolysis of citric acid in the presence of urea are presented.
Abstract: In this report, we present the results of our investigations into the elucidation of the chemical structure of moieties responsible for the blue and green luminescence of CDs derived from the microwave-assisted pyrolysis of citric acid in the presence of urea. The molecular fluorophore that forms during the synthesis of green fluorescing CDs is 4-hydroxy-1H-pyrrolo[3,4-c]pyridine-1,3,6(2H,5H)-trione (HPPT).
169 citations
TL;DR: In this article, the authors have carried out experimental simulations of coal and kerogen degradation in open and closed pyrolysis systems to determine both the gas and oil potential of Type II and Type III organic matter.
169 citations
TL;DR: In this paper, the optimum reaction conditions of the formation of multi-wall carbon nanotubes (MWCNTs) can be obtained by using a 50mg of nano-MgNi alloy under pyrolysis of the pure CH 4 gas with the flow rate about 100-120 cm 3 /min at 650°C for 30min.
168 citations