Journal of Liaoning Petrochemical University
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Research Progress of Reduce-Viscosity Technology for Heavy Oil by Aquathermolysis Technologies
Rong Qingshan, Li Shengke,Zhang Shuang,Zhao Yue,Cai Yaorong,Shi Yan
Abstract869)      PDF (1543KB)(423)      
With the decline of conventional crude oil production, the exploitation and application of heavy oil has gradually attracted attention. However, heavy oil with high density, large viscosity and difficult mining is the problem faced by heavy oil production. There are many ways to reduce the viscosity of heavy oil, among which upgrading visbreaking reaction and non-upgrading visbreaking reaction are two important ways to reduce the viscosity of heavy oil. The latter include heating and viscosity reduction, thinning and viscosity reduction, and chemical viscosity reducing and so on. There are two methods for upgrading visbreaking reaction, namely mild thermal cracking and aquathermolysis. The aquathermolysis viscosity reduction technique is a more efficient method of viscosity reduction based on thermal cracking. Under the appropriate reaction conditions and suitable catalyst conditions, the viscosity of heavy crude oil can be greatly reduced, which is a heavy oil mining technology with good application prospects.
2018, 38 (06): 17-20. DOI: 10.3969/j.issn.1672-6952.2018.06.003

The Corrosion Behavior of Automobile Steel in theSnow Water with Snow Melting Salt

Ning Shugang, Shi Yanhua, Liang Ping, Lin Li
Abstract455)      PDF (3940KB)(279)      

The immersion and electrochemical methods has been used to study the corrosion behavior of automotive steel Q255 in different content of snow melting salt (NaCl) solution. Immersion test show that, the snow melting salt solution is more corrosive than the natural snow solution. The corrosion rate of Q255 steel in the natural water water is smaller than that of the snow melting salt solution, with the corrosion rate of 0.021 07 mm/a after the immersion of 168 h.The corrosion rate increased with the increase of NaCl concentration of the snow solution. The corrosion rate of Q255 steel could reach 0.039 71 mm/a in 3%NaCl solution, the value of which was almost double to the natural snow solution. Electrochemical experiments show that, the presence of chloride ions accelerated the dissolution and mass transfer process of F e 2+ corrosion products, subsequently reduced the adhesion of the corrosion product. Accordingly, the corrosion products would not be able to protect the steel surface, thus the corrosion rate accelerated.

2015, 35 (1): 58-61,66. DOI: 10.3696/j.issn.1672-6952.2015.01.015
Comprehensive Evaluation and Retorting Technology  Selection of Tacheng Oil Shales in Xinjiang
Feng Chenchen, Cao Zubin, Han Dongyun,Li Dandong, Shi Yan, Liang Feixue
Abstract557)      PDF (1818KB)(351)      
The basic physicochemical characteristics of the Tacheng oil shales in Xinjiang province were investigated by a variety of experimental methods and a comprehensive evaluation was carried out. The properties of the oil shales such as oil yield, ash content, volatile component, calorific value, thermal intensity, rigidity and so on were investigated. The experimental result shows that the average oil yield is 7.32%, the average ash content is 65.94%, the average volatile component is 20.41%, the average calorific value is 4.55 MJ/kg, the thermal intensity and rigidity are both similar to the Fushun oil shales. In addition, the compositions of oil shales' ash were analyzed and demonstrated to be S i O2、 A l 2O3、 F e 2O3、 C a Oand MgO. Among them, SiO2 is main composition, followed by Al2O3 and Fe2O3. The comprehensive evaluation result shows that the basic physicochemical characteristics of the Tacheng oil shales in Xinjiang are close to that of Fushun oil shales, and the Fushun furnace retorting technology can suit the process of the Tacheng oil shale in Xinjiang.
2014, 34 (2): 12-16. DOI: 10.3696/j.issn.1672-6952.2014.02.004
 
Corrosion Behavior of Q345 Steel in Soil Contaminated by Lead
CHEN Siyao, LI Tao, LI Quanli, SHI Yanhua, LIANG Ping
Abstract478)      PDF (4075KB)(310)      
 
The lab simulation test of corrosion behavior of Q345 steel in soil contaminated by lead was investigated as time proceeds. The corrosion morphology, corrosion products, chargetransfer resistance and electric current density of Q345 steel were studied by SEM, XRD and electrochemical measurement technology. The experimental results showed that local corrosion and corrosion pits occur at the initial stage, and then with the increase of immersion time, the corrosion forms turn to general corrosion and pitting corrosion. At the initial stage, it could form homogeneous corrosion product film in the sample surface, which had protection effect for matrix, but with the immersion time increases, the corrosion film thicken and fall off. The electrochemical measurement technology research showed that the chargetransfer resistance increased with the time, but decreased suddenly three weeks later and the protective capability of film got weak.
2013, 33 (4): 70-73.
Corrosion Behavior of Q235 and Q345 Steel in Simulated Seawater
SHI Yanhua, LIANG Ping, WANG Yuan, WU Zhanwen
Abstract949)      PDF (4243KB)(628)      
The effect of soaking temperature and stirring rate on the corrosion behavior of Q235 and Q345 steel in simulated seawater environment (3.5%NaCl) was investigated by using soaking experiment. The surface morphology and chemical composition of corrosion products were analyzed by means of SEM and EDS. The results show that the corrosion rate of Q235 and Q345 steel has little difference and increase with increasing temperature in static seawater environment, reaching approximately 0.28 mm/a at 40 ℃. The stirring rate has a significant effect on the corrosion behavior of Q235 and Q345 steel and the corrosion rate accelerates with increasing stirring rate. When stirring rate is 300 r/min, the corrosion rate reaches 1 mm/a that is about 3.5 times as big as temperature effect. Uniform corrosion was observed on Q235 steel in simulated seawater. But the local corrosion morphology is found on Q345 steel and the main corrosion product is iron oxides. The application of Q345 material should be cautious compared with Q235 material in the same seawater environment.
2013, 33 (1): 5-8.
Application of Inverter of Plastic Extrusion Machine
SHI Yan-hong
Abstract477)      PDF (349KB)(215)      
The work process of the plastic extrusion machine and the characteristic of the tension control in the product line of BOPP were introduced. Aiming at the current problem of tension control in extrusion machine, a project was proposed that applied the frequency control technique to the tension control of extrusion machine. The practical test shows that the project of applying VG7 inverter in the extrusion machine can realize the constant tension control, improve the adjustable frequency precision, decrease the cost and operate conveniently, run steadily, and has great market value.
2009, 29 (3): 70-72.