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Xiaoxiao Qian - One of the best experts on this subject based on the ideXlab platform.

Kuan Ding - One of the best experts on this subject based on the ideXlab platform.

Claire C Austin - One of the best experts on this subject based on the ideXlab platform.

  • investigation of various polymeric materials for set point temperature calibration in pyrolysis gas chromatography mass spectrometry py gc ms
    Journal of Analytical and Applied Pyrolysis, 2008
    Co-Authors: L M Lund, P M L Sandercock, G J Basara, Claire C Austin
    Abstract:

    Abstract The precision and long-term stability of pyrolysis probe set-point temperature calibration of a commercially available coiled-filament Pyrolyzer were assessed for a variety of polymers, including Kraton® D1107, high-density polyethylene (HDPE), and low-density polyethylene (LDPE). While plots of peak area ratios for Kraton® and HDPE versus pyrolysis set-point temperatures produced statistically significant linear curves at the 95% confidence level, poor precision was observed at each of the set-point temperatures. Plots of peak area ratios for LDPE, in particular for n-C16 alkyldiene/n-C16 alkene peak area ratios, also exhibited good linearity but showed significant improvements in precision at each set-point temperature. In addition, replicate analysis over a 10-month period of peak area ratios for polymers pyrolyzed at a set-point temperature of 900 °C confirmed the improved method precision obtained from pyrolysis of LDPE and analysis of the n-C16 alkyldiene/n-C16 alkene ratio when compared to the precision obtained from pyrolysis of Kraton® D1107 or high-density polyethylene.

  • Investigation of various polymeric materials for set-point temperature calibration in pyrolysis–gas chromatography–mass spectrometry (Py–GC–MS)
    Journal of Analytical and Applied Pyrolysis, 2008
    Co-Authors: L M Lund, P M L Sandercock, G J Basara, Claire C Austin
    Abstract:

    Abstract The precision and long-term stability of pyrolysis probe set-point temperature calibration of a commercially available coiled-filament Pyrolyzer were assessed for a variety of polymers, including Kraton® D1107, high-density polyethylene (HDPE), and low-density polyethylene (LDPE). While plots of peak area ratios for Kraton® and HDPE versus pyrolysis set-point temperatures produced statistically significant linear curves at the 95% confidence level, poor precision was observed at each of the set-point temperatures. Plots of peak area ratios for LDPE, in particular for n-C16 alkyldiene/n-C16 alkene peak area ratios, also exhibited good linearity but showed significant improvements in precision at each set-point temperature. In addition, replicate analysis over a 10-month period of peak area ratios for polymers pyrolyzed at a set-point temperature of 900 °C confirmed the improved method precision obtained from pyrolysis of LDPE and analysis of the n-C16 alkyldiene/n-C16 alkene ratio when compared to the precision obtained from pyrolysis of Kraton® D1107 or high-density polyethylene.

Yoshizo Suzuki - One of the best experts on this subject based on the ideXlab platform.

  • Enhancement of coal char gasification using a Pyrolyzer–gasifier isolated circulating fluidized bed gasification system
    Fuel Processing Technology, 2013
    Co-Authors: Koichi Matsuoka, Sou Hosokai, Koji Kuramoto, Yoshizo Suzuki
    Abstract:

    Abstract In the present study, we attempted to promote the steam gasification of coal char at low temperatures (below 1173 K). A novel circulating fluidized bed gasification reactor was developed. This reactor consisted of three units: a Pyrolyzer, a gasifier, and a combustor. The main feature of the reactor was that the Pyrolyzer was physically isolated from the gasifier. Such physical isolation of the pyrolysis zone (Pyrolyzer) from the char gasification zone (gasifier) in the reactor can prevent char gasification from being inhibited by contact of the char with hydrogen gas or the tar vapor formed by pyrolysis. Therefore, char gasification was certainly promoted by the physical isolation of the Pyrolyzer from the gasifier in comparison with the conventional gasification reactor, in which pyrolysis and subsequent char gasification proceed in one unit.

  • enhancement of coal char gasification using a Pyrolyzer gasifier isolated circulating fluidized bed gasification system
    Fuel Processing Technology, 2013
    Co-Authors: Koichi Matsuoka, Sou Hosokai, Koji Kuramoto, Yoshizo Suzuki
    Abstract:

    Abstract In the present study, we attempted to promote the steam gasification of coal char at low temperatures (below 1173 K). A novel circulating fluidized bed gasification reactor was developed. This reactor consisted of three units: a Pyrolyzer, a gasifier, and a combustor. The main feature of the reactor was that the Pyrolyzer was physically isolated from the gasifier. Such physical isolation of the pyrolysis zone (Pyrolyzer) from the char gasification zone (gasifier) in the reactor can prevent char gasification from being inhibited by contact of the char with hydrogen gas or the tar vapor formed by pyrolysis. Therefore, char gasification was certainly promoted by the physical isolation of the Pyrolyzer from the gasifier in comparison with the conventional gasification reactor, in which pyrolysis and subsequent char gasification proceed in one unit.

  • Heat balance of fluidized bed gasifier with triple-beds and dual circulation
    Advanced Powder Technology, 2011
    Co-Authors: Takahiro Murakami, Minoru Asai, Yoshizo Suzuki
    Abstract:

    Abstract A new type of circulating fluidized bed gasifier has been proposed. The main features of this proposed gasifier are the adoption of a triple-beds structure (comprising Pyrolyzer, gasifier, and combustor), and a circulation path for tar-absorbing material that is separate from the circulation path for the fuel and silica sand. Independent circulation systems are employed for the fuel system and for the tar-absorbing particles, and the Pyrolyzer and gasifier each have a two-stage fluidized bed. This new gasifier is called “a fluidized bed gasifier with triple-beds and dual circulation”. As the second stage towards development of the proposed new type gasifier, based on the data of the fundamental experiments obtained in our previous study, the parameters for obtaining higher cold gas efficiency as well as the particle circulation rates capable of sustaining desired temperatures in each furnace were clarified by the heat balance. As a result, in the proposed circulating fluidized bed gasifier with a capacity of 5 t/d, a particle circulation rate of 3.1 t/h in the upper stage, and that of 5.8 t/h in the lower stage respectively was required to maintain temperatures of 973 K in the Pyrolyzer, 1073 K in the gasifier, and 1173 K in the combustor. Under these conditions, obtaining a cold gas efficiency of more than 70% was possible.

Zuwei Song - One of the best experts on this subject based on the ideXlab platform.

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