Wax Deposition Inhibition Performance of a PAO/Pour Point Depressant/SiO2-IL Ternary System in High-Wax-Content Model Oil
- 1Tarim Oilfield Company, PetroChina, Korla 841000, China
Abstract
Wax deposition in high-wax-content oils can impair low-temperature transport, while single flow improvers often provide limited control over the overall deposition process. To improve wax deposition inhibition through functional complementarity, a PAO/pour point depressant (PPD)/SiO2-IL ternary formulation was developed. Alkyl-imidazolium-functionalized SiO2 materials with C2, C4, and C6 chains were prepared and characterized by FT-IR, TGA, and SEM. Wax deposition was evaluated using a static cold-finger method at a bulk-oil temperature of 55 °C and a cold-finger temperature of 25 °C. A model oil containing 20 wt% paraffin and a deposition time of 2 h was selected for formulation evaluation. The binary formulation containing 40 ppm PAO and 100 ppm JN-3 achieved a wax deposition inhibition efficiency of 67.53%. Among the SiO2-IL materials, Sil@HIL (C6) showed comparatively high performance, with its highest inhibition at 200 ppm within the tested dosage range. The resulting ternary formulation achieved 77.49% inhibition, which is 9.96 percentage points above the binary formulation. These findings indicate that incorporating Sil@HIL into the PAO/JN-3 formulation further improves wax deposition inhibition under the investigated static conditions.
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BibTeX
@article{zhang2026deposition,
title = {{Wax Deposition Inhibition Performance of a PAO/Pour Point Depressant/SiO2-IL Ternary System in High-Wax-Content Model Oil}},
author = {Penggang Zhang and Mingji Huang and Jinsong Liu and Banghui Deng and Donglei Yang and Junkai Zhu and Ying Guo},
journal = {Molecules},
year = {2026},
month = oct,
doi = {10.3390/molecules31203667},
url = {https://www.mdpi.com/1420-3049/31/20/3667},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Wax Deposition Inhibition Performance of a PAO/Pour Point Depressant/SiO2-IL Ternary System in High-Wax-Content Model Oil
AU - Penggang Zhang
AU - Mingji Huang
AU - Jinsong Liu
AU - Banghui Deng
AU - Donglei Yang
AU - Junkai Zhu
AU - Ying Guo
PY - 2026
DA - 2026/10/14
JO - Molecules
DO - 10.3390/molecules31203667
UR - https://www.mdpi.com/1420-3049/31/20/3667
AB - Wax deposition in high-wax-content oils can impair low-temperature transport, while single flow improvers often provide limited control over the overall deposition process. To improve wax deposition inhibition through functional complementarity, a PAO/pour point depressant (PPD)/SiO2-IL ternary formulation was developed. Alkyl-imidazolium-functionalized SiO2 materials with C2, C4, and C6 chains were prepared and characterized by FT-IR, TGA, and SEM. Wax deposition was evaluated using a static cold-finger method at a bulk-oil temperature of 55 °C and a cold-finger temperature of 25 °C. A model oil containing 20 wt% paraffin and a deposition time of 2 h was selected for formulation evaluation. The binary formulation containing 40 ppm PAO and 100 ppm JN-3 achieved a wax deposition inhibition efficiency of 67.53%. Among the SiO2-IL materials, Sil@HIL (C6) showed comparatively high performance, with its highest inhibition at 200 ppm within the tested dosage range. The resulting ternary formulation achieved 77.49% inhibition, which is 9.96 percentage points above the binary formulation. These findings indicate that incorporating Sil@HIL into the PAO/JN-3 formulation further improves wax deposition inhibition under the investigated static conditions.
SN - 1420-3049
ER -