Effect of ultrasound on colloidal structure of marine fuel oils

1994 ◽  
Vol 30 (5) ◽  
pp. 205-211
Author(s):  
M. Yu. Dolomatov ◽  
V. N. Gordeev ◽  
A. G. Kavyev ◽  
A. V. Afanas'ev ◽  
M. I. Braslavskii
Keyword(s):  
Colloidal Structure ◽  
Marine Fuel ◽  
Fuel Oils

An Experimental Investigation of Burning Droplets of Emulsified Marine Fuel Oils with Water

1995 ◽  
Vol 39 (01) ◽  
pp. 95-101
Author(s):  
Cherng-Yuan Lin ◽  
Chein-Ming Lin ◽  
Che-Shiung Cheng
Keyword(s):  
Experimental Investigation ◽  
Flame Length ◽  
Fuel Oil ◽  
Burning Time ◽  
Marine Fuel ◽  
Oil Emulsion ◽  
Fuel Oils ◽  
Oil Emulsions ◽  
O 15 ◽  
Time Required

An experimental investigation is presented of the influences of emulsification of marine fuel oils A and C with water on the micro-explosion phenomenon and combustion characteristics of a burning droplet. The amount of surfactant and water-to-oil ratio by volume in the emulsion are varied to observe the variations of ignition delay, flame length, time required to attain the maximum flame length, duration as well as intensity of micro-explosion, flame appearance, and overall burning time. The measurements show that the emulsification effects on the combustion of marine fuel oils A and C are different. A droplet of C-oil emulsion is shown to be influenced by the addition of water and surfactant more significantly. The micro-explosion phenomena of droplets of A-and C-oil emulsions are seen to occur after and before their ignition, respectively. In addition, separate combinations of water and surfactant content exist for these fuel oils to achieve better emulsification effects on combustion. Droplets of emulsions with W/O = 15/85, E% = 2% for fuel oil A and W/O = 25/75, E% = 1% for fuel oil C are found to have the most violent droplet-disruption phenomenon and the longest flame length.

Review and proposed extension of the APPEA Method for estimating levels of financial assurance

2018 ◽  
Vol 58 (1) ◽  
pp. 1
Author(s):  
David Horn ◽  
Kristina Downey ◽  
Andrew Taylor
Keyword(s):  
Case Studies ◽  
Initial Period ◽  
Fuel Oil ◽  
Marine Fuel ◽  
Environment Management ◽  
Fuel Oils ◽  
Financial Assurance ◽  
Safety And Environment ◽  
Offshore Petroleum

In 2014, the Australian Petroleum Production and Exploration Association (APPEA) published the ‘Method to assist titleholders in estimating appropriate levels of financial assurance for pollution incidents arising from petroleum activities’, referred to as the APPEA Method. The APPEA Method provides a standard approach to quantifying the appropriate level of financial assurance required under the Offshore Petroleum and Greenhouse Gas Storage Act 2006 (OPGGS Act). The National Offshore Petroleum Safety and Environment Management Authority (NOPSEMA) endorsed the APPEA Method for an initial period of 2 years (until December 2016) with the requirement that APPEA review the method against a broader range of case studies to confirm its validity. In 2017, APPEA applied the APPEA Method to 18 case studies, comparing independently calculated cost estimates with the APPEA Method cost band for each case study. For 17 of the 18 case studies, the independent cost estimate was less than the APPEA Method cost band, confirming the validity of the APPEA Method for those case studies. For one of the case studies involving marine fuel oil, the APPEA Method cost band potentially underestimated the response and clean-up costs. The robustness of the APPEA Method can be improved by amending the hydrocarbon type impact score for fuel oils. Based on the review, NOPSEMA has since endorsed the APPEA Method until September 2018. The APPEA Method is currently endorsed for incidents in which the total volume of hydrocarbon released is <1 000 000 m3 and the total volume of oil ashore is <25 000 m3. Based on an assessment of the response and clean-up costs from three additional case studies that exceeded these limits, amendments to the APPEA Method are proposed that would extend the range of incidents to which it could be applied.

scholarly journals Estimation for Ignition Quality of Marine Fuel Oils

1999 ◽  
Vol 34 (10) ◽  
pp. 682-688
Author(s):  
Yoshikazu Nagai ◽  
Makoto Haneda ◽  
Toshinori Moriwaki ◽  
Kazuo Shimizu ◽  
Takashi Furuse ◽  
...  
Keyword(s):  
Marine Fuel ◽  
Fuel Oils ◽  
Ignition Quality

Study on the Relationship Between Combustion Characteristics and Properties of Marine Heavy Fuel Oil

2003 ◽  
Author(s):  
Takaaki Hashimoto ◽  
Senichi Sasaki
Keyword(s):  
Ignition Delay ◽  
Average Molecular Weight ◽  
Poor Quality ◽  
Combustion Characteristics ◽  
Carbon Residue ◽  
Fuel Oil ◽  
Heavy Fuel Oil ◽  
Marine Fuel ◽  
Fuel Oils ◽  
Flame Retardation

The combustion characteristics (ignition delay and combustion period in this paper) of marine heavy fuel oil are affected by many factors such as density, carbon residue, asphaltene, aromaticity and carbon/hydrogen (C/H) ratio. When investigating the causes of operational problems in diesel engines, what properties should we check to find whether the main causes of the problems are related to fuel oil or not? What is the threshold of ignition delay and combustion period of fuel oil? The authors studied these topics using a combustion test apparatus called FIA 100, and arrived at the following conclusions: 1. The aromaticity index (CCAI) and the C/H ratio have good correlation with the combustion characteristics of marine fuel oil. These factors cannot be ignored during troubleshooting. 2. The carbon residue and asphaltene in fuel oil have no correlation with ignition delay, but have some correlation with the combustion period. 3. There is practically no correlation between the average molecular weight of fuel oil, and both ignition delay and combustion period. 4. Tentative threshold values of ignition delay and combustion period can be set for fuel oils of poor quality (flame retardation).

scholarly journals Characterization of possible alternative materials for the production of marine fuels

Paliva ◽  
2021 ◽  
pp. 16-23
Author(s):  
Dominik Schlehöfer ◽  
Aleš Vráblík ◽  
Rarek Černý
Keyword(s):  
Raw Materials ◽  
Quality Parameters ◽  
Fuel Oil ◽  
Marine Fuel ◽  
Quality Properties ◽  
Alternative Materials ◽  
Fuel Oils ◽  
Sulfur Level ◽  
The Individual ◽  
Low Sulfur

Maritime transport is a significant contributor to the environmental pollution. For this reason, the maximum sulfur content in liquid marine fuels has been drastically reduced since January 1st 2020 for deep sea areas. This reduction can be solved by diluting the conventional high sulfur fuels with suitable low sulfur components. However, mixing two or more components with each other carries a potential risk of incompatibility or instability of the final product, especially in the case of longer storage and subsequent transportation to the end consumers. For the above reasons, this work deals with the mapping of alternative raw materials that could be used to produce very low sulfur fuel oils (VLSFO) with a sulfur level up to 0.5 wt%. A total of 5 raw materials (1 conventional fuel oil – HSFO and 4 alternative raw materials) were characterized. The individual raw materials were compared to each other with regard to the quality properties required for marine fuels according to the ISO 8217. Subsequently, the suitability of these raw materials for further mixing was outlined in order to meet the required quality parameters for marine fuel mixing.

scholarly journals Characterization of possible alternative materials for the production of marine fuels

Paliva ◽  
2021 ◽  
pp. 16-23
Author(s):  
Dominik Schlehöfer ◽  
Aleš Vráblík ◽  
Radek Černý
Keyword(s):  
Raw Materials ◽  
Quality Parameters ◽  
Fuel Oil ◽  
Marine Fuel ◽  
Quality Properties ◽  
Alternative Materials ◽  
Fuel Oils ◽  
Sulfur Level ◽  
The Individual ◽  
Low Sulfur

Maritime transport is a significant contributor to the environmental pollution. For this reason, the maximum sulfur content in liquid marine fuels has been drastically reduced since January 1st 2020 for deep sea areas. This reduction can be solved by diluting the conventional high sulfur fuels with suitable low sulfur components. However, mixing two or more components with each other carries a potential risk of incompatibility or instability of the final product, especially in the case of longer storage and subsequent transportation to the end consumers. For the above reasons, this work deals with the mapping of alternative raw materials that could be used to produce very low sulfur fuel oils (VLSFO) with a sulfur level up to 0.5 wt%. A total of 5 raw materials (1 conventional fuel oil – HSFO and 4 alternative raw materials) were characterized. The individual raw materials were compared to each other with regard to the quality properties required for marine fuels according to the ISO 8217. Subsequently, the suitability of these raw materials for further mixing was outlined in order to meet the required quality parameters for marine fuel mixing.

Emulsification Characteristics of Marine Fuel Oils with Water

1995 ◽  
Vol 39 (01) ◽  
pp. 86-94
Author(s):  
Cherng-Yuan Lin ◽  
Chein-Ming Lin ◽  
Cheh-Skiung Chen
Keyword(s):  
Emulsion Stability ◽  
Test Tube ◽  
Fuel Oil ◽  
Water Droplets ◽  
Marine Fuel ◽  
Residual Fuel Oil ◽  
Saturated State ◽  
Fuel Oils ◽  
Mean Diameter ◽  
Distillate Fuel

The effects of water-to-oil ratio, surfactant content, stayed time, and homogenizing speed on the emulsification characteristics of emulsion activity, emulsion stability, and mean micro-water-droplets diameter for a light distillate fuel oil and a heavy residual fuel oil are experimentally investigated. It is revealed that after centrifuging, the emulsion of the distillate fuel separates into four distinct layers from top to bottom of a test tube. Also, an emulsion of the distillate fuel oil emulsified with surfactant Span 20 is shown to have more fluctuating variations of emulsion activity and mean diameter of water droplets with homogenizing speed. A saturated state of the emulsion with the surfactant addition appears as the surfactant content = 1.5 to 2.0%. Higher surfactant content than 2% is shown to deteriorate the emulsification characteristics of these fuel oils. In addition, the residual fuel oil is found to have better emulsification characteristics in comparison with the distillate fuel oil.

EMERGENCY TRANSFER OPERATIONS INVOLVING HEAVY OILS: TWO CASE STUDIES

2001 ◽  
Vol 2001 (2) ◽  
pp. 1323-1326
Author(s):  
David Usher ◽  
Kenneth Edgar
Keyword(s):  
United States ◽  
Case Studies ◽  
The United States ◽  
High Viscosity ◽  
Heavy Oils ◽  
Case Histories ◽  
Marine Fuel ◽  
Adverse Conditions ◽  
Fuel Oils ◽  
Potential Problems

ABSTRACT Recent marine casualty events in the United States and overseas, involving vessels that are not carrying oil as their primary cargo, have once again highlighted potential problems faced by response personnel when attempting to transfer heavy (high viscosity) oils such as marine fuel oils (MFOs) (Figure 1). During such operations, dealing with the high viscosities typically encountered with these products is an important aspect of the operation's planning, direction and overall success. The problem is not a new one and oil transfer specialists have, over the years, developed equipment and techniques for handling these products (Figure 2). This paper will elaborate upon some of those techniques by presenting two case histories where transfers of heavy oils was successfully accomplished under adverse conditions.

Sign in / Sign up

Export Citation Format

Share Document