YJ-SNC Black Diesel Desulfurization Plant
Our YJ-SNC black diesel desulfurization plant uses desulfurization, denitrification, and decolorization, reducing the sulfur content in black diesel to 10ppm
- Capacity: 10-1000 kiloliters per day
- Output oil sulphur content: about 10 ppm
- Output oil color: 0.1-0.5
- Oil loss rate: 0.1-0.5%
It can refine new Euro 5, Euro 6 standard car diesel from crude oil, oil sludge, heavy oil, tire oil, plastic oil, rubber oil, pyrolysis oil, low quality diesel, sulfur & nitrogen-rich oil, vacuum side streams, acid-refined oil, black diesel oil, etc.
Why We Develop the Black Diesel Desulphurization Plant?
Diesel oil, gas oil, and fuel oil products in petroleum refining are obtained via atmospheric and vacuum distillation and through catalytic cracking. However, these still contain a lot of impurities, including organic sulfur and nitrogen, and polycyclic aromatic hydrocarbons or PAHs. Such impurities are a major contributor to a decrease in the quality of the fuel.
Fuel combustion of organic sulfur and nitrogen creates noxious and hazardous air pollutants. Colloids are formed from the oxidation and polymerisation of PAHs and nitrogen compounds like benzpyrole. These processes decrease the stability of oil and darken the fuel over time.
To combat these issues, the YANGJIANG R&D team, alongside some universities, has created an advanced method of desulphurisation and denitrification, which can achieve a sulphur content in diesel of about 10 ppm.
Invention Patent for Diesel Desulfurization Technology
We found that solid desulfurizing chemicals greatly limit the effectiveness of desulfurization, and it’s also difficult to collect clear and transparent oil. But our researchers are developing new desulfurization technology, and the chemical used can disperse the positive charge of the solid positive material in the plane, so as to construct a positive charge structure that can interact with both types of chemical electrons.
YANGJIANG has been committed to researching and developing new technologies and collaborating with Chinese universities, and has obtained invention patents for diesel fuel desulfurization in 2018 and 2022.
YJ-SNC black diesel desulfurization plant specializes in deodorization, desulfurization, and denitrification in one refining system. Which is suitable for refining the following oil:
- Waste engine oil (distillation first)
- Diesel fuel from Crude oil
- Diesel oil from waste lube oil
- Black/red diesel
- Diesel fuel from Heavy fuel oil(HFO)
- Gas oil
Carbocation-Based Extraction Desulfurization Mechanism and Advantages
We adopt a carbocation-based extraction desulfurization technology, which offers several advantages: operation under normal temperature and pressure, high safety, controllable raw material costs, and high efficiency.
In this process, liquid chemicals are used to dissolve solid positively charged substances, achieving their liquefaction. The liquefying agents possess unique planar structural characteristics, enabling them to disperse the positive charge of the solid material across the plane. This, in turn, creates a positively charged structure capable of interacting with both types of electrons.
As a result, the method demonstrates excellent performance in removing benzothiophene (BT) and dibenzothiophene (DBT) from oil.
Parameter of Output Diesel Oil
The output diesel fuel is distilled by YJ-DSL series used oil distillation plant and desulphurized by the YJ-SNC based on used diesel engine oil.
| Item | Test standard | result | Standard value |
| Density | GB/T 1884 | 0.835 kg/l | 0.828 kg/l |
| Kinematic viscosity(40℃) | GB/T 265 | 3.56 cst | 4.98 cst |
| Flash point(closed cup) | GB/T 261 | 60 ℃ | ≥55 ℃ |
| Pour point | SH/T 0248 | -19 ℃ | ≤ 0 ℃ |
| Distillation temperature | |||
| 10% point | 204 ℃ | —– ℃ | |
| 50%point | 289 ℃ | ≤300 ℃ | |
| 90% point | 344 ℃ | ≤355 ℃ | |
| 95% point | 359 ℃ | ≤365 ℃ | |
| Cetane index | GB/T 386 | 54.42 | ≥45 |
| Sulfur content | SH/T 0689 | 10 mg/kg | ≤10 mg/kg |
The composition of raw oil can affect the parameter index
