scholarly journals Petroleum Asphaltenes - Part 2: the Effect of Asphaltene and Resin Constituents on Recovery and Refining Processes

2004 ◽  
Vol 59 (5) ◽  
pp. 479-488 ◽  
Author(s):  
J. G. Speight
Keyword(s):  
Petroleum Asphaltenes ◽  
Refining Processes

Micronutrient loss during crushing and refining processes

2016 ◽  
Vol 27 (3) ◽  
pp. 20-22
Author(s):  
Jennifer Régis ◽  
◽  
Florent Joffre ◽  
Frédéric Fine ◽  
Keyword(s):  
Refining Processes

Study of hydrogenation of petroleum asphaltenes

1981 ◽  
Vol 46 (2) ◽  
pp. 409-418 ◽  
Author(s):  
Gustav Šebor ◽  
Salvador Reynoso ◽  
Milan Hájek ◽  
Otto Weisser ◽  
Jiří Mostecký
Keyword(s):  
Temperature Region ◽  
Catalytic Hydrogenation ◽  
Starting Material ◽  
Type Analysis ◽  
H Nmr ◽  
Petroleum Asphaltenes

Isolated petroleum asphaltenes were subjected to model thermal and catalytic hydrogenation experiments in the temperature region 300-450° C. The course of hydrogenation of the asphaltenes studied is discussed based on 1H-NMR type analysis of the starting material and the hydrogenation products.

Comparison of the Structures of Molecules in Coal and Petroleum Asphaltenes by Using Mass Spectrometry

2013 ◽  
Vol 27 (7) ◽  
pp. 3653-3658 ◽  
Author(s):  
Matthew R. Hurt ◽  
David J. Borton ◽  
Heewon J. Choi ◽  
Hilkka I. Kenttämaa
Keyword(s):  
Mass Spectrometry ◽  
Petroleum Asphaltenes

Comparison between slag refining processes for B removal with metallurgical grade silicon and Si–Sn alloy

2018 ◽  
Vol 115 (3) ◽  
pp. 312 ◽  
Author(s):  
Rowaid Al-khazraji ◽  
Yaqiong Li ◽  
Lifeng Zhang
Keyword(s):  
Removal Efficiency ◽  
Acid Leaching ◽  
Experimental Results ◽  
Mass Ratio ◽  
Metallurgical Grade Silicon ◽  
Clear Effect ◽  
Slag Refining ◽  
Before And After ◽  
Grade Silicon ◽  
Refining Processes

Boron (B) removal by slag refining using CaO–SiO2–CaCl2 was investigated in metallurgical-grade silicon (MG-Si) and 75 wt% Si–Sn alloy. Experiments were conducted at 1500 °C for 15 min. The microstructure was characterized before and after refining. The effects of acid leaching, basicity, and slag/Si mass ratio on B removal were investigated. Experimental results showed that acid leaching had no effect on B removal from MG-Si but had a clear effect on the refined Si–Sn alloy after slag refining. The final B concentration was highly affected by the CaO/SiO2 mass ratio with minimum value, where the content of B was reduced from 18.36 ppmw to 5.5 ppmw at the CaO/SiO2 = 1.2 for MG-Si slag refining and from 18.36 ppmw to 3.7 ppmw at CaO/SiO2 = 1.5 for 75 wt% Si–Sn alloy. Increasing the slag mass ratio by 2:1 mass ratio also increased B removal efficiency by approximately 15–20% more than an increase by 1:1.

Sacrificial Protection Efficiency Calculations Based on the Results of Stochastically Simulating the Parameters

2021 ◽  
Vol 410 ◽  
pp. 566-571
Author(s):  
Svetlana S. Vinogradova ◽  
Ramilya F. Tazieva ◽  
Anna N. Akhmetova
Keyword(s):  
Operating Conditions ◽  
Oil Refining ◽  
Environmental Aspects ◽  
Protection Level ◽  
Protection Efficiency ◽  
Internal Surfaces ◽  
Protection Systems ◽  
Active Protection ◽  
Refining Processes ◽  
Sacrificial Protection

Unique corrosion conditions in oil refining processes lead to the necessity of using passive and active protection systems, aimed at preventing from damages and ensuring the correct operating conditions of machines. To prevent from the development of corrosion processes on the internal surfaces of horizontal settlers, sacrificial protection is used. Before installing such a protection, they usually calculate the number of protectors to be installed in parallel. Some inputs are stochastic by their nature, which should be considered in assessing the risk of non-achieving the required protection level. The probabilistic model proposed to calculate the parameters of sacrificial tank protection that allows performing an exploratory design based on considering various environmental aspects to decide on the efficiency of sacrificial protection and to assess the achievement of the required protection level.

Sign in / Sign up

Export Citation Format

Share Document