CZ35710U1 - Low sulphur marine fuel containing oil obtained by pyrolysis of waste plastics - Google Patents

Description

Field of technology

The technical solution relates to a low-sulfur marine fuel which contains a suitable proportion of the oil obtained by pyrolysis of waste plastics and at the same time at most 0.5% by weight. open.

State of the art

Current marine fuels, burned in the open seas and oceans, often contain more than 0.5% by weight. open. In order to comply with the currently valid MARPOL International Convention [MARPOL 73/78 - Annex VI, Prevention of Air Pollution from Ships], which currently prescribes a maximum content of 0.5% by weight. sulfur, in these cases it is necessary to equip the vessels with appropriate desulphurisation technology which will ensure the required limit of SCkve content in the combustion products. This limit is in accordance with European Union Regulation [2012/33 / EU] expressed as the ratio of SO2 emissions [mg kg ¹ ] to CO2 [vol. %], the maximum value of which is 21.7.

Desulphurisation technologies are currently of three types. It is an open, closed or hybrid desulphurisation system for combustion products. In all these cases, however, the retrofitting of existing vessels entails significant financial costs associated with the installation of the new equipment as well as its subsequent operation. In the case of a closed cleaning system, a considerable amount of waste is produced, which must be further processed. In the case of an open system, it is necessary to check the quality of the wastewater, which is returned to the seawater. The hybrid system is a combination of an open and a closed system.

Another possibility is the development of a new type of low-sulfur marine fuel using alternative materials, such as pyrolysis oils of various waste materials (used tires or various types of waste plastics). The use of waste materials can be a suitable solution to make the environment easier with an ever-increasing amount of waste. Thanks to their qualitative properties, these products can be further used in the preparation of alternative marine fuels.

Most current low-sulfur marine fuels, which with their sulfur content meet the prescribed requirements, have a low kinematic viscosity value compared to the standard high-sulfur fuel. This fact can be problematic for combustion in older types of two-stroke marine engines.

These disadvantages are at least partially eliminated by the low-sulfur marine fuel containing oil obtained by pyrolysis of waste plastics according to the technical solution.

The essence of the technical solution

Low-sulfur marine fuel containing oil obtained by pyrolysis of waste plastics is characterized in that it contains 70 to 80% by weight. of oil obtained by pyrolysis of waste plastics and 20 to 30 wt. residual fractions from fluid catalytic cracking, so-called oil slurry, containing a maximum of 0.5 wt. open.

The advantage of low-sulfur marine fuel containing slurry oil and oil obtained by pyrolysis of waste plastic according to the technical solution is that it has a low sulfur content not exceeding 0.5% by weight.

Another advantage of low-sulfur marine fuel containing slurry oil and oil obtained by pyrolysis of waste plastics according to the technical solution is that it meets the basic quality parameters of the given

- 1 CZ 35710 UI by the relevant standard [ISO 8217: 2017 Petroleum products - Fuels (class F) - Specifications of marine fuels] for conventional marine fuel of the residual type.

Examples of technical solutions

Example 1

Low-sulfur marine fuel contains 70% by weight. of oil obtained by pyrolysis of waste plastics 10 and 30 wt. slurry oil, containing 0.32 wt. open.

The basic quality properties of this low-sulfur marine fuel have been determined. The results are shown in the following table (Table 1).

Table 1 - Basic quality properties of low-sulfur marine fuel containing oil obtained by pyrolysis of waste plastics and slurry oil for category ISO-F-RMK 700 defined by ISO 8217

Parameter Unit Value ISO 8217 requirement Density at 15 ° C [kg-m ³ ] 941 max 1010 Kinematic viscosity at 50 ° C [ws ¹ ] 698 max 700 CCAI [-] 769.3 max 870 Sulfur content [% by weight] 0.32 this standard does not define TSA [% by weight] 0.08 max 0.10 MCRT [% by weight] 3.5 max 20.00 Point of ignition [° C] 184 mm. 60 Fluid point [° C] 20 max 30 AI + Si content [mgkg ¹ ] 3,859 th most common max 60 Contents V [mgkg ¹ ] 0.136 max 450 Contents On [mgkg ¹ ] 0.297 max 100 Ash content [% by weight] 0.052 max 0.15 Acid number [mg KOH / g] 0.02 max 2.5

Notes to the tables:

CCAI (Calculated Carbon Aromaticity Index) is an indicator of ignition performance, the maximum value of 870 of which is characteristic of the limit ratio between density and viscosity of marine fuel.

TSA (Total Sediment Accelerated) is the total sediment content of marine fuels after chemical aging.

MCRT (Micro Carbon Residue Testing) is a measurement that indicates a tendency to form coke.

The acid number is given by the amount of potassium hydroxide in milligrams needed to neutralize the acids in one gram of the sample analyzed.

From the above results, it is clear that a low-sulfur marine fuel containing oil obtained by pyrolysis

-2GB 35710 UI waste plastics and slurry oil have quality parameters corresponding to the relevant standard and can therefore be used as a fuel for maritime transport. What is important is the very low content of monitored metals, the low total content of sediments after chemical aging, and especially the sulfur content meeting the requirements of MARPOL - Annex VI valid from 1.2020.

Example 2

Low-sulfur marine fuel contains 80% by weight. of oil obtained by pyrolysis of waste plastics and 20 wt. slurry oil, containing 0.22 wt. open.

The basic quality properties of this low-sulfur marine fuel have been determined. The results are shown in the following table (Table 2).

Table 2 - Basic quality properties of low-sulfur marine fuel containing oil 15 obtained by pyrolysis of waste plastics and slurry oil for category ISO-F-RMK 700 defined by ISO 8217

Parameter Unit Value ISO 8217 requirement Density at 15 ° C [kg-m ³ ] 927 max 1010 Kinematic viscosity at 50 ° C [mnrs ¹ ] 609.8 max 700 CCAI [-] 783.6 max 870 Sulfur content [% by weight] 0.22 this standard does not define TSA [% by weight] 0.09 max 0.10 MCRT [% by weight] 2.43 max 20.00 Point of ignition [° C] 189 min. 60

Parameter Unit Value ISO 8217 requirement Fluid point [° C] 24 max 30 Al + Si content [mgkg ¹ ] 3,756 th most common max 60 Contents V [mgkg ¹ ] 0.124 max 450 Contents On [mgkg ¹ ] 0.268 max 100 Ash content [% by weight] 0.058 max 0.15 Acid number [mg KOH'g] 0.03 max 2.5

From the above results, it is clear that a low-sulfur marine fuel containing oil obtained by pyrolysis of waste plastics and slurry oil has quality parameters corresponding to the relevant standard and can therefore be used as a marine fuel. What is important is a very low content of 25 monitored metals, a low total content of sediments after chemical aging, and above all a low content of sulfur meeting the requirements of MARPOL - Annex VI valid from 1.2020.

-3CZ 35710 UI

Industrial applicability

The low-sulfur marine fuel containing oil obtained by pyrolysis of waste plastics and slurry oil according to the technical solution is industrially usable as a fuel for shipping, 5 especially for ships powered by older types of two-stroke marine engines.

-4CZ 35710 UI

Claims (1)

PROTECTION REQUIREMENTS 1. Low-carbon marine fuel, characterized in that it contains 70 to 80% by weight. of oil 5 obtained by pyrolysis of waste plastics and 20 to 30 wt. residual fractions from fluid catalytic cracking, so-called oil slurry, containing a maximum of 0.5 wt. open.