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Xue-Long Yang

Bio: Xue-Long Yang is an academic researcher from Institut Français. The author has contributed to research in topics: Combustion & NOx. The author has an hindex of 2, co-authored 2 publications receiving 31 citations.

Papers
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Journal ArticleDOI
TL;DR: In this paper, the authors present the first experimental investigation of the residence time distribution of the liquid in gas with porous particles, showing that only a relatively small fraction of the pore volume is accessible to the tracer.

24 citations

Journal ArticleDOI
TL;DR: In this paper, the authors compare recent data obtained in high-interaction trickle bed and in cocurrent upflow fixed-bed reactors, and compare the results obtained in both highinteraction and lowinteraction systems.

8 citations

Proceedings ArticleDOI
01 Jan 2022
TL;DR: In this paper , experiments were carried out in a 0.1 MW circulating fluidized bed test platform to investigate the influences of injection positions of pyrolytic wastewater on the combustion temperature and NO x emission of semi-coke.
Abstract: : The amount of pyrolytic wastewater produced by coking plant was huge and it was difficult to deal with, there were many defects in conventional pyrolytic wastewater treatment methods. Incineration method could remove most of the organics and harmful substances in pyrolytic wastewater, and generate CO 2 and H 2 O, it truly realized zero discharge of pyrolytic wastewater, but its effects on the combustion and pollutant emissions of semi-coke was not clear, so experiments were carried out in a 0.1 MW circulating fluidized bed test platform to investigate the influences of injection positions of pyrolytic wastewater on the combustion temperature and NO x emission of semi-coke. The results showed that the NO x emission was cut down by 13.81 %and 22.58 % when pyrolytic wastewater was injected into furnace and tail flue, respectively. It indicated that pyrolytic wastewater realized zero discharge when burning with semi-coke, the NO x emission of semi-coke was cut down as well, and it was more appropriate for pyrolytic wastewater to reduce NO x emission in tail flue compared to the furnace.

Cited by
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Journal ArticleDOI
TL;DR: In this paper, a review of the physical parameters for various multiphase reactors is presented, focusing on gas-phase catalyzed processes with an emphasis on unsteady state operation.
Abstract: Conventional and emerging processes that require the application of multiphase reactors are reviewed with an emphasis on catalytic processes. In the past, catalyst discovery and development preceded and drove the selection and development of an appropriate multiphase reactor type. This sequential approach is increasingly being replaced by a parallel approach to catalyst and reactor selection. Either approach requires quantitative models for the flow patterns, phase contacting, and transport in various multiphase reactor types. This review focuses on these physical parameters for various multiphase reactors. First, fixed-bed reactors are reviewed for gas-phase catalyzed processes with an emphasis on unsteady state operation. Fixed-bed reactors with two-phase flow are treated next. The similarities and differences are outlined between trickle beds with cocurrent gas–liquid downflow, trickle-beds with countercurrent gas–liquid flow, and packed-bubble columns where gas and liquid are contacted in coc...

329 citations

Journal ArticleDOI
TL;DR: In this paper, an overview of multiphase flow metering techniques for gas/liquid analysis can be found, including nonintrusive techniques that deliver global, cross-section-averaged or local data.

325 citations

Journal ArticleDOI
TL;DR: The state of the art of our understanding of the phenomena occurring in three-phase reactors such as packed beds with two-phase #ow, slurry bubble columns and ebullated beds is summarized in this paper.

315 citations

Journal ArticleDOI
TL;DR: In this article, the efficiency of liquid distribution in trickle-bed reactors has been evaluated using cold mockups, using several techniques: global pressure drop measurements, global RTD (Residence-Time Distribution) of the liquid, local heat transfer probes, capacitance tomography, collector at the bottom of the reactor with nine equal zones.
Abstract: The aim of this study is to develop techniques to qualify the efficiency of liquid distribution in trickle-bed reactors, using cold mockups. The experimental setup consists mainly in a 0. 3-m-ID packed-bed column with three different plates used to vary the quality of inlet liquid distribution. Liquid distribution has been qualified using several techniques: global pressure drop measurements, global RTD (Residence-Time Distribution) of the liquid, local heat transfer probes, capacitance tomography, collector at the bottom of the reactor with nine equal zones. The bed pressure drop and the overall external liquid saturation decrease when the maldistribution increases; quantitative information is however difficult to obtain this way. Global RTD of the liquid allows quantifying of the average liquid distribution in the bed. The local thermal sensors give an indication of local liquid velocity and indicate possible local maldistribution of the liquid (scale mm) even when global distribution is good. Concerning the results obtained with the collector, a maldistribution index is defined, ranging from 0 (ideal distribution) to 1 (worst possible distribution), and the influence of the different operating parameters (gas and liquid velocities, particle shape) is discussed.

71 citations

Journal ArticleDOI
TL;DR: In this paper, the axial dispersion and the liquid holdup, as a function of the liquid flow rate, were estimated using residence time distribution experiments, and the normalized tracer concentrations were fitted using a non-linear least square method and the piston-dispersion-exchange model that is solved numerically using the finite differences method.

56 citations