Yanhui Li

Yanhui Li
Xi'an Jiaotong University | XJTU · School of Energy and Power Engineering

Doctor of Engineering

About

112
Publications
17,470
Reads
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1,255
Citations
Citations since 2016
98 Research Items
1238 Citations
20162017201820192020202120220100200300400
20162017201820192020202120220100200300400
20162017201820192020202120220100200300400
20162017201820192020202120220100200300400
Introduction
1) High-temperature oxidation and electrochemical corrosion; 2) Point Defect Models for corrosion of metals and alloys; 3) Supercritical Fluid technologies; 4) Organic wastes treatment; 5) Energy conservation and environment protection
Additional affiliations
April 2019 - present
Xi'an Jiaotong University
Position
  • Professor (Associate)
Description
  • Energy conservation and environment protection, corrosion science, electrochemistry, hydrogen energy, thermal engineering, organic wastes treatment, combustion, supercritical water oxidation, supercritical water gasification, process safety
Education
October 2017 - October 2018
University of California, Berkeley
Field of study
  • Experimental investigation and modeling for corrosion in pressurized water reactor primary circuit
September 2012 - March 2019
Xi'an Jiaotong University
Field of study
  • Energy and Power Engineering
September 2008 - June 2012
Shandong University of Science and Technology
Field of study
  • Energy and Power Engineering

Publications

Publications (112)
Article
The initial corrosion behaviour of austenitic TP347H exposed to supercritical water was investigated. The early oxidation can be categorized into three stages (rapid oxidation, transitory, and diffusion-controlled stages). Higher temperature resulted in a transformation towards the subsequent stage earlier and less oxidation resistance. Cr⁶⁺ specie...
Article
By anodic potentiostatic polarization and electrochemical impedance spectroscopy (EIS) measurements, the effect of temperature (200 °C, 250 °C, and 300 °C) on the electrochemical behavior of Alloy 690 was investigated in oxygenated borate buffer solution containing H 3 BO 3 (2000 ppm B) + LiOH (2 ppm Li). The steady state passive current density wa...
Article
A Point Defect Model has been developed to describe theoretically the corrosion of metals and alloys in supercritical aqueous systems. The model, SCW_PDM, accounts for the kinetics of growth of the barrier layer and the total scale thickness and for the oft-reported growth of the barrier layer with the barrier/outer layer interface remaining at the...
Article
For strengthening the safety and reliability for supercritical water oxidation (SCWO) process, the essential causes and solutions of key challenges such as the high corrosion risk of the heat-exchanger and the entrance part of SCWO reactor, the blockage problems resulted from the solid deposition, and the safety and environmental issues caused by t...
Article
To improve the corrosion resistance of component materials in supercritical water oxidation (SCWO) environment, a 15 μm Cr coating was prepared on Alloy 625 by magnetron sputtering, and the effect of oxygen concentration (0 M, 0.16 M, and 0.94 M) on the stability of the Cr coating in an SCW environment was investigated. Results show that the stabil...
Article
Zr-Y-C coating was prepared from APS, and its enhancement on the oxidation resistance of Zircaloy-4 in air and oxygen was compared with Al2O3 coating. Detailed characterization techniques including SEM, EDS, AFM, Raman spectroscopy and XRD were employed to analyze microstructure evolutions and phase components. Zr-Y-C coating is less susceptible to...
Article
Supercritical hydrothermal combustion is the rapid exothermic oxidation reaction occurring in supercritical water, which can be utilized in the treatment of high-concentration organic wastewaters. In this study, preliminary ignition experiments of continuous hydrothermal combustion are conducted. It is found that using hydrogen peroxide as oxidant...
Article
Due to excellent mechanical properties, thermal stability and catalytic characteristics, zirconia is considered as the most important ceramic materials. Different crystal forms make zirconia play a huge role in solid electrolyte fuel cells, catalysts, thermal barrier coatings, denture materials, mobile phone backplanes, etc. The purpose of this pap...
Article
The degradation of ammonia is a key rate-limiting step during the supercritical water oxidation of nitrogen-containing organics. This paper studied the co-oxidation behavior between different ammonia-alcohol environments, including the influence of reaction parameters and the co-oxidation mechanism. The results showed that increasing temperature, o...
Article
Full-text available
LiFePO4/N-doped C composites with core–shell structures were synthesized by a convenient solvothermal method. Cetyltrimethylammonium bromide (CTAB) and glucose were used as nitrogen and carbon sources, respectively. The growth of LiFePO4 nanocrystals was regulated by CTAB, resulting in an average particle size of 143 nm for the LiFePO4/N-doped C. T...
Article
A self-assembled core-shell structured S-doped LiMn0.5Fe0.5PO4@N/S-doped C composites were prepared by a convenient one-step solvothermal process. The glucose-derived carbon microspheres are coated with LiMn0.5Fe0.5PO4 particles and form secondary particles of core-shell structure. Thioacetamide (TAA) and cetyltrimethylammonium bromide (CTAB) regul...
Article
Full-text available
In this study, the erosion-corrosion experiment of Ni based alloys in high-temperature and high-pressure supercritical water environment was performed. SiO2 and Al2O3 particles with the average diameter of 30 μm and 50 μm were used as erodent. The special designed specimens were fixed on a blade impeller, and the erosion tests were performed in a h...
Article
Corrosion behavior of FeCrAl alloy and Zircaloy-4 coated with NiCr in hydrogenated water was studied. FeCrAl alloy exhibited non-uniform corrosion and increased surface roughness. Its inner oxides were mainly Fe/Cr oxides, while the outer oxides were mostly Fe spinels. NiCr coating was well-covered on the Zircaloy-4 substrate after exposure. Ni-ric...
Article
The corrosion characteristics of stainless steel 316 and typical nickel-based alloys in supercritical water containing sulfides were investigated by a series of detection methods. Breakaway corrosion occurred on Incoloy 825 and Inconel 600 due to sulfide-formed tunnels or enriched microlayers in the inner layer of corrosion scales. In supercritical...
Article
The effect of chloride concentration on the passivity breakdown of carbon steel in deaerated pH = 13.5 alkaline solution was investigated. The results show that chloride plays an important role for the pitting corrosion of carbon steel. When NaCl ≤1 M, the carbon steel is passive but for 1 M< NaCl < 2 M, the carbon steel transfers from passive to p...
Article
Chemical looping hydrogen production is a kind of technology for high-carbon energy cleaning and low-carbon utilization with great development potential, which can realize H2 production and CO2 separation at low cost. CaSO4 oxygen carrier, as the non-metal oxide oxygen carrier, is not only cheap in price and friendly to the environment, but also hi...
Article
The protective effect of NiCr coating in supercritical water (SCW) was studied in this work. NiCr coated 316 L stainless steel showed an excellent microstructure and performance stability in SCW. The corrosion weight gains of as-received 316L were 2–3.6 times of that of NiCr coated sample in SCW with 5000 ppm oxygen content. The coating greatly red...
Article
Full-text available
During the operation of the boiler, the ash deposition phenomenon in the furnace will cause abnormal operation of the boiler system. This will lead to an increase the pollutant emission. To relieve the pollutant emission during the abnormal operation of the boiler, the mechanism of ash deposition was investigated from the perspective of reducing th...
Article
In order to obtain widespread applications for Zhundong high-iron coal, the interaction characteristics of calcium and iron during the Zhundong high-iron coal combustion were investigated experimentally in one-dimensional furnace and further explored via molecular dynamics (MD) simulation. The properties of raw coal and formed ash deposition were a...
Article
A novel supercritical water system was proposed to treat sewage sludge harmlessly in this work, with its core to produce syngas by supercritical water gasification (SCWG) of sewage sludge and dispose of the residual liquid organics by supercritical water oxidation (SCWO) for heat release and harmless disposal. Moreover, a cool wall reactor was empl...
Article
Full-text available
Nano-zirconia has been widely applied due to its excellent physical and chemical properties (e.g., high strength, corrosion resistance, oxygen ion conductivity). Existing preparation methods of nano-zirconia tend to require long reaction time, and the sizes of final particles are large with uneven distributions. Sub-/supercritical hydrothermal synt...
Article
Passivity breakdown on HDSS 2707 has been studied and the electrochemical data are interpreted in terms of the Point Defect Model. Pitting parameters of HDSS 2707 are determined, including the polarizability at bl/s interface, the defect annihilation rate, and the defect diffusion coefficient. The breakdown potential is demonstrated to be linearly...
Article
Full-text available
The reburning process in a furnace, a key way to reduce NOx emissions, is a heterogeneous reaction during coal combustion, in which the heterogeneous adsorption is dominant. Zhundong coal with a high content of alkali metal can enhance the reburning process. In this paper, the influence of sodium and a defect on NO heterogeneous adsorption was stud...
Article
Organic materials, such as ion exchange resins, plastic, oils, and solvents, are widely used in the operation and decommission of nuclear facilities. The generated radioactive organic wastes are both radioactive and organic; therefore, the degradation of such wastes becomes more difficult. Due to delays in the disposal of radioactive organic wastes...
Article
Stainless steel 316SS and Hastelloy C276, as the representatives of iron-based and nickel-based alloy, respectively, were employed to explore the corrosion properties under reducing subcritical and supercritical water containing sulfide. Experiments were executed at a pressure of 25 MPa, temperatures of 350 °C–520 °C, and sulfur concentrations of 1...
Article
Full-text available
As one of the five major coal mine disasters, the water inrush disaster poses a serious threat to the safety of the country and people, so the prevention work for that becomes very important. However, there is no perfect assessment system that can better solve the complex dependence relationships among disaster-causing factors of water inrush disas...
Article
A hydrothermal fluid system proposed in this paper is composed of immiscible molten salts and sub-/supercritical water (also named as hydrothermal molten salt, HyMoS). It can avoid salt deposition and equipment blocking in the process of SCWO treatment of hypersaline glyphosate wastewater, which provides an exalting technical idea for preventing an...
Article
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Article
Full-text available
In this paper, the treatment characteristics of glyphosate wastewater based on supercritical water oxidation (SCWO) technology is studied both in spiral coiled tube reactor and tank reactor, including the influences of operating parameters such as reaction temperature, reaction pressure, oxidation coefficient, residence time, and initial properties...
Article
The safety of nuclear power plants has put forward new requirements for the corrosion resistance of fuel cladding with the advancement of industrialization. FeCrAl alloys are expected to be a substitute for Zircaloy. This work summarizes the corrosion of Zircaloy and presents a comprehensive review on the corrosion behavior of FeCrAl alloys includi...
Article
Full-text available
The anisotropic deposit film formed during the galvanic corrosion can impede the mass transfer of the involved species, thereby affecting the electro-chemical behavior and the evolution of galvanic corrosion. The limitations of experimental studies in the spatial-temporal scales restrict a deeper understanding of the corrosion mechanism, which can...
Article
Full-text available
Hydrothermal liquefaction (HTL) and supercritical water gasification (SCWG), two effective thermochemical approaches converting biomass into biofuels, have received increasing attention due to their advantages of a fast reaction rate and the use of wet feedstocks without the need for an energy-intensive drying process. In this review, we first summ...
Article
The harsh work environments caused by high-temperature, high-pressure water, especially the presence of aggressive species such as oxygen and salts, makes equipment corrosion to be a key problem restricting large-scale industrial application of the supercritical water technologies. In this work, the corrosion characteristics of Ni-Fe-Cr and Ni-Fe-C...
Article
The corrosion of supercritical water system materials under high-temperature and high-pressure conditions exists widely, which may result in the serious damage of the supercritical water reactor. Therefore, the improvement of the corrosion resistance of reactor material is important for ensuring the serviceability of the supercritical water reactor...
Article
The optimization and mechanism for oxidation of the waste anion exchange resin from the nuclear industry in supercritical water were investigated. To achieve the maximum chemical oxygen demand (COD) and total nitrogen (TN) removal efficiencies, the response surface methodology (RSM) was employed to optimize four operating variables. Two quadratic p...
Article
Full-text available
This study investigates the thermodynamic equilibrium analysis of the supercritical water gasification (SCWG) involving several typical feedstocks (coal, sewage sludge, microalga, and sawdust). The effects of various parameters including feed concentrations, temperatures, and pressures are analyzed. It is observed that temperature and feed concentr...
Article
Petrochemical sludge is difficult to be degraded by traditional methods due to the complex organic pollutants, supercritical water oxidation (SCWO) is a promising technology for treating different industrial wastes. In this article, a comprehensive SCWO plant coupled with ammonia distillation and biochemical treatment with the processing capacity n...
Article
Lithium iron phosphate (LiFePO4) is one of the most important cathode materials for high-performance lithium-ion batteries in the future, due to its incomparable cheapness, stability and cycle life. However, low Li-ion diffusion and electronic conductivity, which are related to the charging rate and low-temperature performance, have become the bott...
Article
Conventional physical, biochemical, and incineration treatments of hypersaline organic wastewater have some major drawbacks, such as the incomplete removal of organic matter, severe secondary pollution, increased salinity, or massive salt-out problems. Supercritical water oxidation (SCWO) is an advanced oxidation technology for treating organic was...
Article
Full-text available
Supercritical water oxidation (SCWO) is a promising wastewater treatment technology owing to its various advantages such as rapid reactions and non-polluting products. However, problems like corrosion and salt decomposition set obstacles to its commercialization. To address these problems, researchers have been developing the optimal reactor design...
Article
Supercritical water oxidation (SCWO), as a promising technology for treating organic wastewater and sludge, has attracted the attention of many scholars. Nitrogen-containing organics are refractory substances that widely exist in industrial waste, and their effective degradation is of great significance to the environment. In this paper, the treatm...
Article
The effect of temperature on the passive state of carbon steel in simulated concrete pore solution is examined. The mixed potential model (MPM) was used to optimize the Electrochemical Impedance Spectroscopic data to deconvolve the partial anodic (dissolution of the steel) and cathodic reactions (hydrogen evolution). The results show that the domin...
Article
Full-text available
Supercritical hydrothermal synthesis of nanosized metal oxides is of great interest for scholars due to its one-pot and readily realizing commercial production process. Hydrothermal synthesis of nanosized TiO 2 in subcritical and supercritical water was investigated with different reaction temperatures (250–450°C), time (3–10 min), precursor specie...
Article
In this work, a kinetic model, which describes the reactions occurring during the hydrogen charging process on a graphite surface, was optimized on Electrochemical Impedance Spectroscopic (EIS) to study the entry of hydrogen into graphite in high temperature molten FLiNaK salt. The results show that the rate constants of k1 increases with decreasin...
Article
Carbon dioxide uniform corrosion occurs widely in the petroleum industry and threatens the safe production and transportation of petroleum resources. It is a complex issue involving a variety of physical, chemical and electrochemical processes in multiple temporal and spatial scales. A fully coupled model, taking into account all involved processes...
Article
The effect of Graphite on the corrosion of Type 316L stainless steel (SS) was investigated in molten FLiNaK (LiF-NaF-KF: 46.5−11.5−42 mol.%) salt using electrochemical methods. Results show that Type 316L SS and Graphite, when ohmically-coupled, are susceptible to galvanic corrosion in molten fluoride salts. The Graphite, with the more positive ele...
Article
Full-text available
Supercritical hydrothermal combustion, a new and promising homogeneous combustion technology with a wide range of application scenarios and broad development prospects, provides creative ideas and means for the enhanced degradation of organic wastes, hydrothermal spallation drilling, thermal recovery of heavy oil, etc. This technology is elaborated...
Article
The dependence on water density of the formation and growth of the outer scale layer was revealed by using scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) to analyze the effects of additive phosphates on morphology and composition of oxide scales formed on 316 stainless steel in supercritical w...
Article
Full-text available
The mining subsidence basins are mostly irregular. The traditional method is difficult to achieve quantitative evaluation of mining subsidence damage. This paper investigated the quantitative indicators of land subsidence damage evaluation based on GIS. The calculation method of the area and volume of surface subsidence caused by underground mining...
Chapter
The potential of SCWO lies in the complete destruction of persistent, organic waste materials. The main obstacles in the technical application of SCWO include the construction materials degradation triggered by high-temperature and high-pressure conditions and some highly aggressive species (such as oxygen, acids, alkali, and some salts), the preci...
Chapter
Full-text available
Nanomaterials are always at the leading emerging area of material and nanotechnology. Especially in this age, the ever-increasing population in the world makes energy, chemicals and other resource efficiency particularly important in sustaining concept [1]. The significant reduction in size (1–100 nm) often improves their electronic and other prope...
Chapter
Full-text available
Supercritical water (SCW: T > 374.15 °C, P > 22.1 MPa) possesses specially physical and chemical properties such as high diffusivity, low viscosity, low dielectric constant, and a small amount of hydrogen bonds. Organic matter and oxygen can be dissolved in SCW with any ratio under high enough pressure condition while the solubility of inorganic sa...
Chapter
Above the critical point (T = 374.15 °C, P = 22.1 MPa), water exists as a single phase and has analogous transportation properties of gas and solvent properties like liquid, which is known as supercritical water (SCW) (Kutney in thermodynamic and transport property modeling in super critical water. Massachusetts Institute of Technology, 2005 [1]; S...
Chapter
Sewage sludge (SS) with a moisture content of about 80 wt% is a byproduct of wastewater treatment. With the development of the urbanization process, this amount has been increasing with the construction and expansion of wastewater treatment plants. Containing complex organic matters as well as heavy metal and viruses, SS is not only a pollutant but...
Chapter
Full-text available
Energy, especially electricity, plays a vital role in our modern industrial society and in our current civilization. In order to increase the power generation efficiency of fossil fuels, supercritical and ultra-supercritical power plants, using supercritical water (SCW) as the working medium, have been developed over the past century [1].
Chapter
Hydrogen is defined as an attractive energy carrier due to its potentially higher energy efficiency and lower generation of pollutants, which can replace conventional fossil fuels in the future. The governments have invested huge funds and made great efforts on the research of hydrogen production. Among the various options, supercritical water gasi...
Chapter
Today’s commercial operation of power systems, such as Supercritical Generating Unit and IGCC, presents some congenital problems [1]. First, both the investment and operation cost of the desulfurization and denitration equipment are very expensive. Second, the carbon capture is not only inefficient but also leads to the power generation efficiency...
Book
This book systematically presents the technical aspects of supercritical water oxidation and supercritical water gasification for energy and environmental applications, which include reactor design, construction materials, corrosion, salt precipitation, etc. The book provides a comprehensive introduction to the properties of supercritical water, an...