Search results for: Youqing Wu

Items from 1 to 20 out of 23 results

article

Effect of resistance internal on hydrodynamic behaviours and bubble characteristics in a laboratory‐scale bubble column

Jiashu Qian, Youqing Wu, Sheng Huang, Shiyong Wu, more

The Canadian Journal of Chemical Engineering > 101 > 4 > 2317 - 2329

A novel resistance internal is proposed to optimize the flow field and improve the gas–liquid contact in a co‐hydrogenation reactor of coal and vacuum residuum. Local gas holdup, local liquid velocity, and characteristics of the bubble were investigated in a scaled‐down laboratory model. The quantitative results showed that the resistance internals could reduce the thickness of the liquid reflux layer...

article

Characteristics of Na2CO3-catalyzed water-gas shift reaction under coal liquefaction conditions

Huan Li, Quan You, Shiyong Wu, Youqing Wu, more

Fuel > 2018 > 232 > C > 639-644

The characteristics of Na₂CO₃-catalyzed water-gas shift reaction (WGSR) under coal liquefaction conditions were investigated. The reactivity of WGSR could be enhanced by improving water content and initial pressure of CO, owing to the reduced activation energy for WGSR in the high water density and subcritical state. The Na₂CO₃ had a promoting effect on WGSR, and a synergistic effectbetween Na₂CO₃...

article

Effects of sulfur additive on the transformation behaviors of γ‐Fe₂O₃ and coal liquefaction performances under mild conditions

Runze Zhao, Lan Yang, Xue Song, Weishan Zhang, more

Asia‐Pacific Journal of Chemical Engineering > 13 > 4 > n/a - n/a

In this paper, the effects of sulfur on liquefaction performances of coal and the transformation behaviors of γ‐Fe₂O₃ at the S/Fe atomic ratio of 0–1.3 under mild conditions were investigated. Compared with traditional liquefaction processes, the oil yield and coal conversion were insensitive to the addition of sulfur under mild conditions (temperature of 430°C, reaction pressure of 8.5–13.8 MPa)...

article

A Preliminary investigation of CO effects on lignite liquefaction process

Huan Li, Shiyong Wu, Youqing Wu, Sheng Huang, more

Fuel > 2018 > 221 > C > 417-424

This paper made a preliminary investigation of CO effects on lignite liquefaction process. The Schütze method coupled with an elemental analyzer was adopted for directly determining the O contents of liquid and solid materials, and the O balance, variation amounts of water, and CO consumptions were calculated quantitatively for liquefaction processes. It was found that the two reactions which were...

article

Structure characteristics and gasification activity of residual carbon from updraft fixed-bed biomass gasification ash

Sheng Huang, Shiyong Wu, Youqing Wu, Jinsheng Gao

Energy Conversion and Management > 2017 > 136 > C > 108-118

The structure characteristics and gasification activity of residual carbon in biomass ash from a 5MW commercial updraft fixed-bed gasification power plant were investigated using a Raman spectroscopy, a pore structure analyzer and a thermo-gravimetric analyzer. In the investigated biomass gasification ashes, some fractions with a relatively high residual carbon contents could be probably recycled...

article

Regenerable magnesium-based sorbent for high-pressure and moderate-temperature CO2 capture: Physicochemical structures and capture performances

Hao Feng, Shiyong Wu, Sheng Huang, Youqing Wu, more

Fuel > 2015 > 159 > C > 559-569

The CO₂ capture for a kind of magnesium-based sorbent from commercially available magnesium-based materials was carried out for CO₂ capture under high pressures (up to 2.5MPa) and moderate temperatures (200–400°C). Simultaneously, the evolutions of its physicochemical structures during cyclic capture were analyzed by an X-ray Diffractometer (XRD), a thermo-gravimetric analyzer (TGA), a scanning electron...

article

Structure characteristics and gasification activity of residual carbon from entrained-flow coal gasification slag

Shiyong Wu, Sheng Huang, Liyuan Ji, Youqing Wu, more

Fuel > 2014 > 122 > Complete > 67-75

The structure characteristics and gasification activity of residual carbon from entrained-flow coal gasification slag were mainly investigated using a pore structure analyzer, a scanning electron microscopy, a Raman spectroscopy and a thermo-gravimetric analyzer. Simultaneously, a kind of residual carbon from coal chars was used for a reference. Results showed that the residual carbon which was usually...

article

Effect of CS2 extraction on the physical properties and gasification activity of liquid-phase carbonization cokes

Sheng Huang, Shiyong Wu, Yamin Ping, Youqing Wu, more

Journal of Analytical and Applied Pyrolysis > 2012 > 93 > Complete > 33-40

Two kinds of liquid-phase carbonization cokes (LPCCs) were prepared using vacuum residue (VR) and coal tar pitch (CTP) at 350–500°C, at which the carbonaceous mesophase appears typically. And the effect of CS ₂ extraction on the physical properties (carbon crystalline structures, surface morphologies, surface areas and pore structures) and gasification activity of LPCCs were mainly investigated...

chapter

Hydrothermal liquefaction of corn straw under CO atmosphere: Effect of catalysts

Chaowen Wu, Wencai Peng, Shiyong Wu, Youqing Wu, more

2011 Second International Conference on Mechanic Automation and Control Engineering > 6567 - 6570

2011 Second International Conference on Mechanic Automation and Control Engineering (MACE)

The effects of different catalysts (homogeneous catalysts: NaOH, Na₂CO₃, KOH and K₂CO₃; heterogeneous catalysts: JB-1, JT-201 and JT-203) on the hydrothermal liquefaction of biomass under CO atmosphere were investigated mainly using a high-pressure autoclave reactor at 380°C. The results indicated that the conversion of biomass and the yield of liquid products increased obviously with the adding of...

article

Potassium-catalyzed steam gasification of petroleum coke for H2 production: Reactivity, selectivity and gas release

Youqing Wu, Jianjian Wang, Shiyong Wu, Sheng Huang, more

Fuel Processing Technology > 2011 > 92 > 3 > 523-530

Potassium-catalyzed steam gasification of petroleum coke for H ₂ production was performed using a laboratory fixed-bed reaction system with an on-line quadruple mass spectrometer. The gasification reactivity, gasification selectivity and gas release for the catalytic gasification were investigated, compared with the non-catalytic gasification. The catalytic gasification could not only effectively...

article

Physicochemical properties and structural evolutions of gas-phase carbonization chars at high temperatures

Youqing Wu, Shiyong Wu, Sheng Huang, Jinsheng Gao

Fuel Processing Technology > 2010 > 91 > 11 > 1662-1669

The gas-phase carbonization chars from hydrocarbons with low molecular weight (anthracene oil and petroleum ether) were prepared using a drop tube reactor at 1000–1200°C, and their physicochemical properties and structural evolutions (elemental composition, carbon crystallite structure, surface morphology, pore structure and chemical composition of volatile matters) were mainly investigated. The chars...

article

Investigations on CS ₂ -Solube Fractions and Gasification Reactivity of Liquid-Phase Carbonization Cokes

Youqing Wu, Sheng Huang, Shiyong Wu, Jinsheng Gao

Energy & Fuels > 2010 > 24 > 10 > 5596 - 5601

chapter

Reaction Kinetic Characteristics of a Multi - Metal Adsorbent for HCl Removal at High Temperatures

Youqing Wu, Shiyong Wu, Wencai Peng, Bo Pan, more

2010 4th International Conference on Bioinformatics and Biomedical Engineering > 1 - 4

2010 4th International Conference on Bioinformatics and Biomedical Engineering (iCBBE 2010)

In this paper, the HCl removal ability of a multi-metal adsorbent was investigated in the temperature range of 573-873K. The results showed that the adsorbent had an excellent activity for HCl removal, and its breakthrough chlorine content reached 42.53% at 773K. Besides, the reaction kinetics of the adsorbent with HCl was also studied at temperatures from 573 to 773K. Simultaneously considering the...

article

Physico-Chemical Characteristics and Mineral Transformation Behavior of Ashes from Crop Straw

Youqing Wu, Shiyong Wu, Ye Li, Jinsheng Gao

Energy & Fuels > 2009 > 23 > 10 > 5144 - 5150

article

Differences in physical properties and CO2 gasification reactivity between coal char and petroleum coke

Youqing Wu, Shiyong Wu, Jing Gu, Jinsheng Gao

Process Safety and Environmental Protection > 2009 > 87 > 5 > 323-330

This paper mainly investigated the physical properties and gasification reactivity of coal char and petroleum coke, separately at the high temperature pyrolysis (950–1400°C) with slow heating rate and pyrolysis pressure of the atmospheric pressure and at the pressurized pyrolysis (the atmospheric pressure to 3MPa) with rapid heating rate and the pyrolysis temperature of 950°C. Some significant differences...

chapter

A Watermarking Sharing Scheme for Gray-Level Images Using Multiple-Based Number System

Bin Luo, Youqing Wu, Jin Tang, Wanli Lv, more

2008 Second International Symposium on Intelligent Information Technology Application > 3 > 389 - 393

2008 Second International Symposium on Intelligent Information Technology Application

A novel watermarking sharing scheme for gray-level images is proposed, which has the ability of sharing secret (the gray-level image) with multi-users. Multiple-based number system is used to split the secret into n meaningless shares, each share is embedded into cover image with controlled distortion and to be assigned to each user afterwards. The main feature of the proposed scheme is sharing a...

article

Differences in Gasification Behaviors and Related Properties between Entrained Gasifier Fly Ash and Coal Char

Jing Gu, Shiyong Wu, Youqing Wu, Ye Li, more

Energy & Fuels > 2008 > 22 > 6 > 4029 - 4033

article

Variation of Carbon Crystalline Structures and CO ₂ Gasification Reactivity of Shenfu Coal Chars at Elevated Temperatures

Shiyong Wu, Jing Gu, Xiao Zhang, Youqing Wu, more

Energy & Fuels > 2008 > 22 > 1 > 199 - 206

article

Adsorption of NaCl Vapor at Elevated Temperature on Mineral Adsorbents

Yili Li, Jian Li, Shuiyuan Cheng, Wenjun Liang, more

Energy & Fuels > 2007 > 21 > 6 > 3259 - 3263

article

Interactions between Carbon and Metal Oxides and Their Effects on the Carbon/CO ₂ Reactivity at High Temperatures

Shiyong Wu, Xiao Zhang, Jing Gu, Youqing Wu, more

Energy & Fuels > 2007 > 21 > 4 > 1827 - 1831

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Keywords

GASIFICATION ACTIVITY (3)
CHEMICAL ENGINEERING (2)
CHEMICALS (2)
CO (2)
PETROLEUM COKE (2)
RESIDUAL CARBON (2)
STRUCTURE CHARACTERISTICS (2)
ACTIVE PHASE (1)
ADSORPTION (1)
ARTIFICIAL NEURAL NETWORKS (1)
ASH (1)
ATMOSPHERE (1)
BIOMASS (1)
BIOMASS GASIFICATION ASH (1)
BUBBLE CHARACTERISTICS (1)
BUBBLE COLUMN (1)
CAPTURE PERFORMANCES (1)
CARBON (1)
CATALYST (1)
CATALYTIC STEAM GASIFICATION (1)
CHAR (1)
CHEMICAL REACTIONS (1)
CHLORINE CONTENT (1)
CO CONSUMPTION (1)
COAL CHAR (1)
COAL LIQUEFACTION (1)
CORN STRAW (1)
CRYPTOGRAPHY (1)
CS2 EXTRACTION (1)
DIFFUSION (1)
ENTRAINED-FLOW COAL GASIFICATION (1)
EQUATIONS (1)
GAS DIFFUSION (1)
GAS HOLDUP (1)
GAS-PHASE CARBONIZATION (1)
GASIFICATION REACTIVITY (1)
GASIFICATION SLAG (1)
GRAY-LEVEL IMAGES (1)
HCOONA (1)
HIGH TEMPERATURE CARBONIZATION (1)
HIGH-PRESSURE AND MODERATE-TEMPERATURE CO2 CAPTURE (1)
HYDROGEN (1)
HYDROTHERMAL LIQUEFACTION (1)
IMAGE CODING (1)
KINETIC THEORY (1)
LAKES (1)
LIGNITE (1)
LIQUEFACTION (1)
LIQUID VELOCITY (1)
LIQUID-PHASE CARBONIZATION COKE (1)
MAGNESIUM-BASED SORBENT (1)
MATHEMATICAL MODEL (1)
MILD CONDITIONS (1)
MULTI-METAL ADSORBENT (1)
MULTIPLE-BASED NUMBER SYSTEM (1)
NA2CO3 (1)
NUMBER THEORY (1)
OWNERSHIP VERIFICATION (1)
OXYGEN CONTENT (1)
PHYSICAL PROPERTIES (1)
PHYSICAL PROPERTY (1)
PHYSICOCHEMICAL PROPERTY (1)
PHYSICOCHEMICAL STRUCTURES (1)
PRESSURIZED PYROLYSIS (1)
PRIVATE KEY CRYPTOGRAPHY (1)
PRODUCTION (1)
REACTION KINETIC (1)
REACTION KINETICS (1)
REACTION PROCESS (1)
REACTIVITY (1)
RESISTANCE INTERNAL (1)
ROBUSTNESS (1)
S/FE ATOMIC RATIO (1)
SECRET SHARING (1)
SECURITY (1)
SELECTIVITY (1)
SHARING SECRET (1)
SHRINKING UNREACTED CORE MODEL (1)
SILICON (1)
SOLIDS (1)
STRUCTURAL EVOLUTION (1)
SULFUR DISTRIBUTION (1)
TEMPERATURE 573 K TO 873 K (1)
TEMPERATURE DISTRIBUTION (1)
UPDRAFT FIXED-BED GASIFIER (1)
WATER-GAS SHIFT REACTION (1)
WATERMARKING (1)
WATERMARKING SHARING SCHEME (1)
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ACS (9)
Elsevier (9)
ieee (3)
Wiley (2)

INFONA - science communication portal

Search results for: Youqing Wu

Effect of resistance internal on hydrodynamic behaviours and bubble characteristics in a laboratory‐scale bubble column

Characteristics of Na2CO3-catalyzed water-gas shift reaction under coal liquefaction conditions

Effects of sulfur additive on the transformation behaviors of γ‐Fe₂O₃ and coal liquefaction performances under mild conditions

A Preliminary investigation of CO effects on lignite liquefaction process

Structure characteristics and gasification activity of residual carbon from updraft fixed-bed biomass gasification ash

Regenerable magnesium-based sorbent for high-pressure and moderate-temperature CO2 capture: Physicochemical structures and capture performances

Structure characteristics and gasification activity of residual carbon from entrained-flow coal gasification slag

Effect of CS2 extraction on the physical properties and gasification activity of liquid-phase carbonization cokes

Hydrothermal liquefaction of corn straw under CO atmosphere: Effect of catalysts

Potassium-catalyzed steam gasification of petroleum coke for H2 production: Reactivity, selectivity and gas release

Physicochemical properties and structural evolutions of gas-phase carbonization chars at high temperatures

Investigations on CS ₂ -Solube Fractions and Gasification Reactivity of Liquid-Phase Carbonization Cokes

Reaction Kinetic Characteristics of a Multi - Metal Adsorbent for HCl Removal at High Temperatures

Physico-Chemical Characteristics and Mineral Transformation Behavior of Ashes from Crop Straw

Differences in physical properties and CO2 gasification reactivity between coal char and petroleum coke

A Watermarking Sharing Scheme for Gray-Level Images Using Multiple-Based Number System

Differences in Gasification Behaviors and Related Properties between Entrained Gasifier Fly Ash and Coal Char

Variation of Carbon Crystalline Structures and CO ₂ Gasification Reactivity of Shenfu Coal Chars at Elevated Temperatures

Adsorption of NaCl Vapor at Elevated Temperature on Mineral Adsorbents

Interactions between Carbon and Metal Oxides and Their Effects on the Carbon/CO ₂ Reactivity at High Temperatures

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