Raman Systems for E-10 Fuel Monitoring
Measuring E-10 properties directly at the gasoline blend header is essential for ensuring real-time accuracy in fuel composition and quality. Accurate monitoring at this stage allows refineries to make immediate adjustments to the gasoline blend, preventing costly off-spec batches and ensuring compliance with regulatory standards for ethanol content. This real-time approach eliminates delays and reduces the risks associated with traditional off-line analysis methods.
Conventional methods involve collecting grab samples of gasoline blends, manually mixing them with ethanol, and sending them to the lab for routine analysis—a process that can take hours and incur significant operational costs. HORIBA’s Process Raman spectroscopy overcomes these challenges by enabling on-line monitoring of E-10 properties directly at the gasoline blend header, streamlining operations, and optimizing production efficiency.
Your Simple, Cost-efficient Turnkey Solution
HORIBA Process Raman offers a non-destructive, efficient, and cost-effective solution for monitoring E-10 gasoline properties, empowering refiners to optimize production processes, ensure product quality, and maintain compliance. Explore how our cutting-edge Raman technology can transform your blending operations.
Benefits of HORIBA Process Raman for E-10 Monitoring
- Real-Time Adjustments: Immediate detection of ethanol content enables refineries to fine-tune blends, minimizing costly rework.
- Regulatory Compliance: Maintain strict adherence to ethanol content requirements to meet industry and government standards.
- Operational Efficiency: Reduce time and labor associated with traditional lab-based sampling and analysis.
- Enhanced Accuracy: Achieve highly reliable results with minimal standard deviation and a high degree of linear correlation.
HORIBA Process Raman systems for E-10 fuel monitoring offer a non-destructive, efficient, and cost-effective solution for monitoring E-10 gasoline properties, empowering refiners to optimize production processes, ensure product quality, and maintain compliance. Explore how our cutting-edge Raman technology can transform your blending operations
Blended & Neat RBOB/CBOB Properties Model Summary
Blended Properties
| Parameter | Range | r2 | SECV | Samples |
| RON |
91.7 – 98 |
0.97 |
0.200 |
113 |
| MON |
80.8 – 88.6 |
0.98 |
0.198 |
113 |
| (R+M)/2 |
86.5 – 93.3 |
0.98 |
0.160 |
113 |
| RVP |
10.49 – 13.8 |
0.98 |
0.099 |
101 |
| IBP |
77.6 – 88.5 |
0.66 |
1.48 |
91 |
| 10% |
103.8 – 125 |
0.91 |
1.22 |
83 |
| 50% |
150 – 217.9 |
0.92 |
4.16 |
83 |
| 90% |
282.6 – 337.9 |
0.98 |
2.07 |
81 |
| EP |
361.3 – 410.7 |
0.93 |
3.21 |
81 |
| E300 |
82.2 – 93.4 |
0.98 |
0.38 |
85 |
| API |
61.04 – 66.9 |
0.992 |
0.17 |
49 |
| AROMATICS |
4.5 – 18.4 |
0.97 |
0.60 |
32 |
| BENZENE |
0.0765 – 0.9045 |
0.99 |
0.025 |
47 |
| OLEFINS |
5.6 – 23.2 |
0.98 |
0.65 |
31 |
| SULFUR |
10.4 – 68.135 |
0.88 |
3.91 |
92 |
| TV/L |
104 – 122.3 |
0.87 |
1.39 |
82 |
Neat Properties
| Parameter | Range | r2 | SECV | Samples |
| RON |
86.6 – 93.5 |
0.98 |
0.229 |
201 |
| MON |
79.2 – 87.9 |
0.99 |
0.206 |
201 |
| (R+M)/2 |
83.4 – 90.4 |
0.992 |
0.165 |
201 |
| RVP |
9.92 – 13.67 |
0.96 |
0.149 |
223 |
| IBP |
75 – 85.2 |
0.75 |
1.98 |
99 |
| 10% |
103 – 126.3 |
0.77 |
2.26 |
99 |
| 50% |
183 – 223.5 |
0.98 |
1.51 |
102 |
| 90% |
286.5 – 339.8 |
0.99 |
1.89 |
103 |
| EP |
355.9 – 427.5 |
0.96 |
3.82 |
99 |
| E300 |
80.6 – 93.3 |
0.992 |
0.36 |
84 |
| API |
62.59 – 70.52 |
0.994 |
0.166 |
62 |
| AROMATICS |
9.5 – 18.7 |
0.87 |
0.87 |
43 |
| BENZENE |
0.387 – 1.2885 |
0.993 |
0.022 |
23 |
| OLEFINS |
14.8 – 24.1 |
0.56 |
1.47 |
40 |
| SULFUR |
12.04 – 73.77 |
0.87 |
5.1 |
72 |
| TV/L |
110 – 137.9 |
0.96 |
0.92 |
185 |
Raman Analysis of Ethanol in Gasoline
Comparisons Between Actual Predicted Ethanol
One year case study of Raman instrument measurements
Online predictions for other key E10 properties
Raman Analysis of Ethanol in Gasoline
The Raman spectra clearly demonstrate the ability to measure ethanol concentrations in gasoline blends with precision. Ethanol’s dominant peak at 882 cm⁻¹ is easily detected in gasoline, allowing accurate quantification of ethanol levels ranging from 0–10 vol%.
Key data from the study:
- Accuracy: Comparisons between actual and predicted ethanol concentrations yielded a standard deviation of just 0.09 vol%.
- Correlation: A correlation coefficient of 0.9993 highlights the strong linear relationship between Raman predictions and actual ethanol content.
- Detection Limits: With a standard HORIBA PI-200-L spectrograph, ethanol concentrations were measured with exceptional precision. Lower detection limits, down to 500 ppm, can be achieved with a high-performance CCD, increased laser power, or extended sample integration time.
One year case study of Raman instrument measurements:
- 320 samples are collected over one year to ensure inclusion of seasonal and crude slate changes.
- Chemometric models were developed using only neat Raman spectra.
- Model training set built using 90% of spectra.
- Remaining 10% set aside as an independent validation data set.
- Standard error of cross-validation (SECV) for the ROAD E10 partial least-squares (PLS) regression analysis using six factors: 0.205 octane units
- Standard error of prediction (SEP) for ROAD E10 for validation data set: 0.222 with no outliers
Online predictions for other key E10 properties:
- Reid vapor pressure (RVP)
- Distillation points
- E-200 and E-300
- Aromatics
- Benzene
- Olefins
- Temperature for vapor/liquid ratio (TV/L)
Resources
At HORIBA Process Instruments, we are committed to more than just delivering cutting-edge Raman technology—we aim to empower you with the knowledge and tools to excel in your industry. Our Resources & Knowledge Base is your go-to hub for expert insights, technical documentation, and best practices to optimize your process monitoring and analysis.
Learn Morecontact our experts
Send us a message or give us a call at (801) 322-1235 and our team will be in touch shortly.
*indicates a required field.