The Experts below are selected from a list of 321 Experts worldwide ranked by ideXlab platform

Chunxi Lu - One of the best experts on this subject based on the ideXlab platform.

  • bed density and circulation Mass Flowrate in a novel annulus lifted gas solid air loop reactor
    Chemical Engineering Science, 2010
    Co-Authors: Chunxi Lu
    Abstract:

    Abstract Air loop reactors (ALR) have been widely used as promising and high-efficiency gas–liquid and gas–liquid–solid reactors. Extensive research on ALR has been conducted, but mostly limited to gas–liquid and gas–liquid–solid systems. Work associated with gas–solid systems has been rare and mainly focused on draft tube-lifted spouted bed treating coarse Geldart B, D particles. The present paper proposed a novel gas–solid air-loop reactor treating fine Geldart A particles and operating in a new annulus-lifted mode, with bubbling or turbulent bed upward flow in the annulus in parallel with bubbling bed downward flow in the draft tube. In view of these differences, distinct hydrodynamic behaviour can be anticipated for the gas–solid annulus-lifted air-loop reactor. The influence of operating conditions and geometric configuration on the distribution of bed density is discussed in a cold model annulus-lifted air loop reactor. A mechanistic model for the circulation Mass Flowrate is established based on an energy balance and resistance analysis. Nearly 50% and 30% of the energy dissipation rate occurs in the bottom and top regions, respectively. With increasing draft tube height, the energy dissipation rate increases in the annulus and draft tube regions, while it decreases in the top and bottom regions. The circulation Mass Flowrate decreases with increasing draft tube height. Analysis of the distribution of bed density and energy dissipation rate leads to suggestions regarding optimization of the design and axial location of the ring distributor and gap height.

  • Bed density and circulation Mass Flowrate in a novel annulus-lifted gas–solid air loop reactor
    Chemical Engineering Science, 2010
    Co-Authors: Chunxi Lu
    Abstract:

    Abstract Air loop reactors (ALR) have been widely used as promising and high-efficiency gas–liquid and gas–liquid–solid reactors. Extensive research on ALR has been conducted, but mostly limited to gas–liquid and gas–liquid–solid systems. Work associated with gas–solid systems has been rare and mainly focused on draft tube-lifted spouted bed treating coarse Geldart B, D particles. The present paper proposed a novel gas–solid air-loop reactor treating fine Geldart A particles and operating in a new annulus-lifted mode, with bubbling or turbulent bed upward flow in the annulus in parallel with bubbling bed downward flow in the draft tube. In view of these differences, distinct hydrodynamic behaviour can be anticipated for the gas–solid annulus-lifted air-loop reactor. The influence of operating conditions and geometric configuration on the distribution of bed density is discussed in a cold model annulus-lifted air loop reactor. A mechanistic model for the circulation Mass Flowrate is established based on an energy balance and resistance analysis. Nearly 50% and 30% of the energy dissipation rate occurs in the bottom and top regions, respectively. With increasing draft tube height, the energy dissipation rate increases in the annulus and draft tube regions, while it decreases in the top and bottom regions. The circulation Mass Flowrate decreases with increasing draft tube height. Analysis of the distribution of bed density and energy dissipation rate leads to suggestions regarding optimization of the design and axial location of the ring distributor and gap height.

  • Bed density and circulation Mass Flowrate in a novel annulus-lifted gas-solid air loop reactor
    Chemical Engineering Science, 2010
    Co-Authors: Mengxi Liu, Xiaoming Zhu, Jianping Xie, Chunxi Lu, Mingxian Shi
    Abstract:

    Air loop reactors (ALR) have been widely used as promising and high-efficiency gas-liquid and gas-liquid-solid reactors. Extensive research on ALR has been conducted, but mostly limited to gas-liquid and gas-liquid-solid systems. Work associated with gas-solid systems has been rare and mainly focused on draft tube-lifted spouted bed treating coarse Geldart B, D particles. The present paper proposed a novel gas-solid air-loop reactor treating fine Geldart A particles and operating in a new annulus-lifted mode, with bubbling or turbulent bed upward flow in the annulus in parallel with bubbling bed downward flow in the draft tube. In view of these differences, distinct hydrodynamic behaviour can be anticipated for the gas-solid annulus-lifted air-loop reactor. The influence of operating conditions and geometric configuration on the distribution of bed density is discussed in a cold model annulus-lifted air loop reactor. A mechanistic model for the circulation Mass Flowrate is established based on an energy balance and resistance analysis. Nearly 50% and 30% of the energy dissipation rate occurs in the bottom and top regions, respectively. With increasing draft tube height, the energy dissipation rate increases in the annulus and draft tube regions, while it decreases in the top and bottom regions. The circulation Mass Flowrate decreases with increasing draft tube height. Analysis of the distribution of bed density and energy dissipation rate leads to suggestions regarding optimization of the design and axial location of the ring distributor and gap height. © 2010 Elsevier Ltd.

  • Effect of draft tube gas distributor on hydrodynamics in an annulus-lifted gas-solid air loop reactor
    Huagong Xuebao/CIESC Journal, 2010
    Co-Authors: Mengxi Liu, Zhanchuan Niu, Chunxi Lu, Zhu'an Wang
    Abstract:

    Extensive research on air loop reactors(ALR) has been conducted, but mostly limited to gas-liquid and gas-liquid-solid systems. Work associated with gas-solid systems has been rare and mainly focused on draft tube-lifted fluidized bed and spouted bed. The present paper addressed a gas-solid air-loop reactor treating fine Geldart A particles and operating in a new annulus-lifted mode, with bubbling or turbulent bed upward flow in the annulus in parallel with bubbling bed downward flow in the draft tube. The influence of operating conditions and axial position of draft tube gas distributor on the distribution of bed density, particle circulation velocity and circulation Mass Flowrate is discussed. By mounting draft tube gas distributor in the bottom region, bed density radial distribution and particle circulation Mass Flowrate is significantly improved. Bed density in 0.367 < r/R < 0.49 is still high, signifying a limited influence range and potential optimization of gas distributor. Particle circulation velocity and circulation Mass Flowrate for the axial position of 32 mm is greater than that for other axial positions.

Mingxian Shi - One of the best experts on this subject based on the ideXlab platform.

  • Bed density and circulation Mass Flowrate in a novel annulus-lifted gas-solid air loop reactor
    Chemical Engineering Science, 2010
    Co-Authors: Mengxi Liu, Xiaoming Zhu, Jianping Xie, Chunxi Lu, Mingxian Shi
    Abstract:

    Air loop reactors (ALR) have been widely used as promising and high-efficiency gas-liquid and gas-liquid-solid reactors. Extensive research on ALR has been conducted, but mostly limited to gas-liquid and gas-liquid-solid systems. Work associated with gas-solid systems has been rare and mainly focused on draft tube-lifted spouted bed treating coarse Geldart B, D particles. The present paper proposed a novel gas-solid air-loop reactor treating fine Geldart A particles and operating in a new annulus-lifted mode, with bubbling or turbulent bed upward flow in the annulus in parallel with bubbling bed downward flow in the draft tube. In view of these differences, distinct hydrodynamic behaviour can be anticipated for the gas-solid annulus-lifted air-loop reactor. The influence of operating conditions and geometric configuration on the distribution of bed density is discussed in a cold model annulus-lifted air loop reactor. A mechanistic model for the circulation Mass Flowrate is established based on an energy balance and resistance analysis. Nearly 50% and 30% of the energy dissipation rate occurs in the bottom and top regions, respectively. With increasing draft tube height, the energy dissipation rate increases in the annulus and draft tube regions, while it decreases in the top and bottom regions. The circulation Mass Flowrate decreases with increasing draft tube height. Analysis of the distribution of bed density and energy dissipation rate leads to suggestions regarding optimization of the design and axial location of the ring distributor and gap height. © 2010 Elsevier Ltd.

Mengxi Liu - One of the best experts on this subject based on the ideXlab platform.

  • Bed density and circulation Mass Flowrate in a novel annulus-lifted gas-solid air loop reactor
    Chemical Engineering Science, 2010
    Co-Authors: Mengxi Liu, Xiaoming Zhu, Jianping Xie, Chunxi Lu, Mingxian Shi
    Abstract:

    Air loop reactors (ALR) have been widely used as promising and high-efficiency gas-liquid and gas-liquid-solid reactors. Extensive research on ALR has been conducted, but mostly limited to gas-liquid and gas-liquid-solid systems. Work associated with gas-solid systems has been rare and mainly focused on draft tube-lifted spouted bed treating coarse Geldart B, D particles. The present paper proposed a novel gas-solid air-loop reactor treating fine Geldart A particles and operating in a new annulus-lifted mode, with bubbling or turbulent bed upward flow in the annulus in parallel with bubbling bed downward flow in the draft tube. In view of these differences, distinct hydrodynamic behaviour can be anticipated for the gas-solid annulus-lifted air-loop reactor. The influence of operating conditions and geometric configuration on the distribution of bed density is discussed in a cold model annulus-lifted air loop reactor. A mechanistic model for the circulation Mass Flowrate is established based on an energy balance and resistance analysis. Nearly 50% and 30% of the energy dissipation rate occurs in the bottom and top regions, respectively. With increasing draft tube height, the energy dissipation rate increases in the annulus and draft tube regions, while it decreases in the top and bottom regions. The circulation Mass Flowrate decreases with increasing draft tube height. Analysis of the distribution of bed density and energy dissipation rate leads to suggestions regarding optimization of the design and axial location of the ring distributor and gap height. © 2010 Elsevier Ltd.

  • Effect of draft tube gas distributor on hydrodynamics in an annulus-lifted gas-solid air loop reactor
    Huagong Xuebao/CIESC Journal, 2010
    Co-Authors: Mengxi Liu, Zhanchuan Niu, Chunxi Lu, Zhu'an Wang
    Abstract:

    Extensive research on air loop reactors(ALR) has been conducted, but mostly limited to gas-liquid and gas-liquid-solid systems. Work associated with gas-solid systems has been rare and mainly focused on draft tube-lifted fluidized bed and spouted bed. The present paper addressed a gas-solid air-loop reactor treating fine Geldart A particles and operating in a new annulus-lifted mode, with bubbling or turbulent bed upward flow in the annulus in parallel with bubbling bed downward flow in the draft tube. The influence of operating conditions and axial position of draft tube gas distributor on the distribution of bed density, particle circulation velocity and circulation Mass Flowrate is discussed. By mounting draft tube gas distributor in the bottom region, bed density radial distribution and particle circulation Mass Flowrate is significantly improved. Bed density in 0.367 < r/R < 0.49 is still high, signifying a limited influence range and potential optimization of gas distributor. Particle circulation velocity and circulation Mass Flowrate for the axial position of 32 mm is greater than that for other axial positions.

Edi Z Syams - One of the best experts on this subject based on the ideXlab platform.

  • the effect of different linear robot travel speed on Mass Flowrate of pineapple leaf fibre palf automated spray up composite
    Composites Part B-engineering, 2019
    Co-Authors: Z M Hanafee, A Khalina, M Norkhairunnisa, Edi Z Syams
    Abstract:

    Abstract This paper investigates the effect of different linear robot travel speed on Mass Flowrate of bio composites automated spray up. The linear robot travel speed investigated are 0.5, 0.75, 1.0, 1.25 and 1.5 m/s. In this study, the manual chop spray gun is integrated with industrial robotic arm to produce random discontinuous fibre composite (DFC) from PALF roving (273 tex) and vinyl ester resin. Samples fabricated are tested for mechanical properties including tensile and flexural, and thermal properties including TGA and DMA. The results showed that the speed of 0.75 m/s yielded 28.70 MPa of tensile strength, tensile modulus of 3.17 GPa, with the lowest Coefficient of Variance (COV) of 9.51%, which denotes the best combination compared to all other robot speed. The flexural test depicted speed of 1.0 m/s to be the highest with 59.12 MPa with 18.10% COV, while speed 0.75 m/s produced the best COV of 12.67% despite lower flexural strength of 55.83 MPa. The TGA showed that the 0.75 m/s speed sample yielded the highest onset oxidation temperature (OOT) of 392.06 °C and highest maximum combustion temperature of 433.40 °C. The DMA depicted the highest Glass Transition Temperature (Tg) of 118.20 °C is also recorded by the 0.75 m/s robot speed composite sample.

Jianping Xie - One of the best experts on this subject based on the ideXlab platform.

  • Bed density and circulation Mass Flowrate in a novel annulus-lifted gas-solid air loop reactor
    Chemical Engineering Science, 2010
    Co-Authors: Mengxi Liu, Xiaoming Zhu, Jianping Xie, Chunxi Lu, Mingxian Shi
    Abstract:

    Air loop reactors (ALR) have been widely used as promising and high-efficiency gas-liquid and gas-liquid-solid reactors. Extensive research on ALR has been conducted, but mostly limited to gas-liquid and gas-liquid-solid systems. Work associated with gas-solid systems has been rare and mainly focused on draft tube-lifted spouted bed treating coarse Geldart B, D particles. The present paper proposed a novel gas-solid air-loop reactor treating fine Geldart A particles and operating in a new annulus-lifted mode, with bubbling or turbulent bed upward flow in the annulus in parallel with bubbling bed downward flow in the draft tube. In view of these differences, distinct hydrodynamic behaviour can be anticipated for the gas-solid annulus-lifted air-loop reactor. The influence of operating conditions and geometric configuration on the distribution of bed density is discussed in a cold model annulus-lifted air loop reactor. A mechanistic model for the circulation Mass Flowrate is established based on an energy balance and resistance analysis. Nearly 50% and 30% of the energy dissipation rate occurs in the bottom and top regions, respectively. With increasing draft tube height, the energy dissipation rate increases in the annulus and draft tube regions, while it decreases in the top and bottom regions. The circulation Mass Flowrate decreases with increasing draft tube height. Analysis of the distribution of bed density and energy dissipation rate leads to suggestions regarding optimization of the design and axial location of the ring distributor and gap height. © 2010 Elsevier Ltd.