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CFD simulation of jet behaviors in a binary gas-solid fluidized bed: comparisons with experiments

Pei PEI, Guiying WU, Bangting YU, Kai ZHANG, Jianchun JIANG, Dongsheng WEN,

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 3, Pages 242-249 doi: 10.1007/s11705-009-0277-3

Abstract: Based on the experimental observation of the fluidization characteristics of solid mixtures (resin andExperimental results show that there is a fluidization velocity interval (-) for the resin-on-rapeseed

Keywords： mathematical two-dimensional flotsam-on-jetsam fluidization velocity physical

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Key issues in development of offshore natural gas hydrate

Shouwei ZHOU, Qingping LI, Xin LV, Qiang FU, Junlong ZHU

Frontiers in Energy 2020, Volume 14, Issue 3, Pages 433-442 doi: 10.1007/s11708-020-0684-1

Abstract: As a new clean energy resource in the 21st century, natural gas hydrate is considered as one of the most promising strategic resources in the future. This paper, based on the research progress in exploitation of natural gas hydrate (NGH) in China and the world, systematically reviewed and discussed the key issues in development of natural gas hydrate. From an exploitation point of view, it is recommended that the concepts of diagenetic hydrate and non-diagenetic hydrate be introduced. The main factors to be considered are whether diagenesis, stability of rock skeleton structure, particle size and cementation mode, thus NGHs are divided into 6 levels and used unused exploitation methods according to different types. The study of the description and quantitative characterization of abundance in hydrate enrichment zone, and looking for gas hydrate dessert areas with commercial exploitation value should be enhanced. The concept of dynamic permeability and characterization of the permeability of NGH by time-varying equations should be established. The ‘Three-gas co-production’ (natural gas hydrate, shallow gas, and conventional gas) may be an effective way to achieve early commercial exploitation. Although great progress has been made in the exploitation of natural gas hydrate, there still exist enormous challenges in basic theory research, production methods, and equipment and operation modes. Only through hard and persistent exploration and innovation can natural gas hydrate be truly commercially developed on a large scale and contribute to sustainable energy supply.

Keywords： natural gas hydrate exploitation offshore diagenetic and non-diagenetic hydrate solid-state fluidization

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Zhao Yuemin: Gas Solid Fluidization Dry Separation (2022-8-14)

5 Sep 2022

Keywords：绿色化工

Research Status and Prospects of Natural Gas Hydrate Exploitation Technology

Li Qingping , Zhou Shouwei , Zhao Jiafei, Song Yongchen , Zhu Junlong

Strategic Study of CAE 2022, Volume 24, Issue 3, Pages 214-224 doi: 10.15302/J-SSCAE-2022.03.022

Abstract: the research and application status of NGH exploitation technologies including depressurization and solidfluidization.

Keywords： natural gas hydrates(NGH) exploitation technology depressurization solid fluidization combined method

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Self-sustained catalytic combustion of CO enhanced by micro fluidized bed: stability operation, fluidization

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 9, doi: 10.1007/s11783-023-1709-x

Abstract:

● Catalytic combustion in fluidized bed realizes efficient heat and mass transfer.

Keywords： Self-sustained catalytic combustion Carbon monoxide Cu_1–xCe_xO_y Fluidized bed Computational fluid dynamics

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Plasma spray coating on interconnector toward promoted solid oxide fuel cells and solid oxide electrolysis

Frontiers in Energy doi: 10.1007/s11708-023-0901-9

Abstract: Interconnector is a critical component to construct solid oxide cells (SOCs) stack.

Keywords： interconnector coating plasma spray electrochemical performance Cr diffusion inhibition solid oxide

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Minimal residual disease in solid tumors: an overview

Frontiers of Medicine 2023, Volume 17, Issue 4, Pages 649-674 doi: 10.1007/s11684-023-1018-6

Abstract: techniques, and strategies for the detection of cancer, and emphasizes the application of MRD detection in solid

Keywords： MRD solid tumor CTC ctDNA

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Development of a hydrodynamic model and the corresponding virtual software for dual-loop circulating fluidized beds

Shanwei Hu, Xinhua Liu

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 3, Pages 579-590 doi: 10.1007/s11705-020-1953-6

Abstract: Modeling the gas-solid CFB system requires a quantitative description of the multiscale heterogeneityThis research can be expected to provide quantitative references for the design and scale-up of gas-solidCFB reactors and lay a solid foundation for the realization of virtual process engineering.

Keywords： multi-loop circulating fluidized bed mathematical modeling energy minimization multiscale virtual fluidization

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High-solid anaerobic digestion of sewage sludge: achievements and perspectives

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 4, doi: 10.1007/s11783-020-1364-4

Abstract:

• High-solid anaerobic digestion (HS-AD) of sewage sludge (SS) is overviewed

Keywords： High-solid effect Anaerobic fermentation Methane production Biodegradability Sludge treatment

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Review of SO42-/MxOy solid superacid catalysts

Yanni WU, Shijun LIAO

Frontiers of Chemical Science and Engineering 2009, Volume 3, Issue 3, Pages 330-343 doi: 10.1007/s11705-009-0208-3

Abstract: solid superacid catalysts, play a vital role in more and more fields such as organic synthesis, fineThis review highlights the recent development of solid superacid catalysts based on , including synthesis

Keywords： solid superacid catalyst synthesis method characterization applications

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Performance of inverse fluidized bed bioreactor in treating starch wastewater

M. RAJASIMMAN, C. KARTHIKEYAN

Frontiers of Chemical Science and Engineering 2009, Volume 3, Issue 3, Pages 235-239 doi: 10.1007/s11705-009-0020-0

Abstract: Aerobic digestion of starch industry wastewater was carried out in an inverse fluidized bed bioreactor using low-density (870 kg/m ) polypropylene particles. Experiments were carried out at different initial substrate concentrations of 2250, 4475, 6730, and 8910 mg COD/L and for various hydraulic retention times (HRT) of 40, 32, 24, 16, and 8 h. Degradation of organic matter was studied at different organic loading rates (OLR) by varying the HRT and the initial substrate concentration. From the results it was observed that the maximum COD removal of 95.6% occurred at an OLR of 1.35 kg COD/(m ·d) and the minimum of 51.8% at an OLR of 26.73 kg COD/(m ·d). The properties of biomass accumulation on the surface of particles were also studied. It was observed that constant biomass loading was achieved over the entire period of operation.

Keywords： inverse fluidization low-density particles polypropylene starch biofilm

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Repercussions of COVID-19 pandemic on solid waste generation and management strategies

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 6, doi: 10.1007/s11783-021-1407-5

Abstract:

• Implication of COVID-19 on medical waste and MSW generation is studied.

Keywords： COVID-19 Medical waste Personal protective equipment Municipal solid waste Waste management

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Theoretical and experimental study on the fluidity performance of hard-to-fluidize carbon nanotubes-based CO2 capture sorbents

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 10, Pages 1460-1475 doi: 10.1007/s11705-022-2159-x

Abstract: amount of 7.5 and 5 wt% SiO₂ nanoparticles are required to achieve an agglomerate particulate fluidization/sub> and synthesized carbon nanotubes + 5 wt% SiO₂ indicates an agglomerate particulate fluidizationcharacteristic, including the high-level bed expansion ratio, low minimum fluidization velocity (1.5sub> uptake capacity but also decreases the required amount of silica additive to reach a homogeneous fluidization

Keywords： CO₂ capture CNT-based sorbents fluidization SiO₂ nanoparticles fluidized bed

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Municipal solid waste management in Dalian: practices and challenges

Xinbei WANG, Yong GENG

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 4, Pages 540-548 doi: 10.1007/s11783-011-0361-z

Abstract: The fast growing of urban areas in developing countries has brought serious problems on municipal solid

Keywords： municipal solid waste (MSW) management 3R principles challenges eco-efficiency effective and efficient

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Lagrangian simulation of deposition of CO gas-solid sudden expansion flow

HUANG Dongping, DING Guoliang, QUACK Hans

Frontiers in Energy 2008, Volume 2, Issue 2, Pages 216-221 doi: 10.1007/s11708-008-0032-3

Abstract: Freezing and blockage resulting from the deposition of solid CO formed because of sudden expansion ofTo overcome this problem, the characteristics of the CO gas-solid sudden expansion flow are studied byA comparison of the calculated deposition of the solid CO with the experimental results shows that theyThe simulation results show that the size of the solid CO formed should not be in the range of 0.04–0.07

Keywords： comparison gas-solid downstream blockage Lagrangian