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Detailed characterization of organic components in low-rank coals is essential for the utilization of coals in clean, effective and value-added ways. Two kinds of low-rank coals were subjected to sequential thermal dissolution in the order of cyclohexane, acetone, and methanol to obtain six soluble portions (SPs) from the coals. Two gas chromatographic systems, gas chromatography/mass spectrometry...
An initial method to efficiently control methane hydrate formation process was investigated in this work. This method included an in-situ injection of a small amount of CO2 into the reactor during the nucleation stage to explore hydrate formation in 0.5mmol/L sodium dodecyl sulfate (SDS) solutions. Results showed that charging CO2 higher than 2% in the mixed gases could induce immediate methane hydrate...
The formation of the 16 polycyclic-aromatic hydrocarbons (PAHs), characterized by USEPA as priority pollutants, was studied during the pyrolysis of dry sewage sludge in a wide range of operation conditions, i.e., reaction temperature (250–1250°C), sample mass (0.1–4g), gas residence time (2–16s) and gas flow (50–1000mL/min). The pyrolysis was conducted in a tubular reactor with well-controlled temperature...
The syngas chemical looping (SCL) process circulates iron-based oxygen carrier particles through three reactors, namely the reducer, the oxidizer, and the combustor, to perform reduction–oxidation reaction cycles for converting gaseous fuels to highly concentrated discrete streams of hydrogen (H 2 ) and carbon dioxide (CO 2 ). The counter-current moving-bed operation of the reducer...
Two-dimensional (2-D) and three-dimensional (3-D) temperature distributions in laboratory-scale and large-scale pulverized-coal fired furnaces were reconstructed experimentally by means of CCD cameras through the inverse radiation analysis. The reconstruction technique was developed based on the backward Monte Carlo method. The reconstruction matrix equation was solved by the least square QR decomposition...
Biodiesel fuel from renewable non-edible woody plant oils has recently attracted more attention due to its environmental benefits and the reduced costs of raw materials. This study investigated the enzymatic transesterification of Pistacia chinensis bge seed oil (PCO) with methanol. The recombinant Rhizopus oryzae lipases (ROL) immobilized on macroporous resin and anion exchange resin, named as MI-ROL...
This paper presented a model for simultaneously measuring the two-dimensional temperature and particle concentration distribution from the images of the flame. In order to determine the relationship between a point in the three-dimensional space and its image in the camera, the optical image-formation process was analyzed. The inverse problem of the radiation transfer in the participating medium was...
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