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Cited by 6Advanced Combustion Engine TechnologiesBiodiesel Production and ApplicationsEngine and Fuel Emissions

Influence of 1-Hexanol/Waste Plastic Oil Blends on Combustion, Performance, and Emission Characteristics of a Common Rail Direct Injection Diesel Engine

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Chaitanya, A V Krishna, Mohanty, Dillip Kumar·2025·ACS Omega
DOI 10.1021/acsomega.4c06693PMC PMC11740376
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Abstract

Waste plastic oils (WPOs) can help address the global energy crisis caused by the rapid depletion of fossil fuels, global warming, and strict emission regulations. The present research delves into the intricate interplay of higher alcohol blends in the context of combustion, performance, and emission characteristics within a common rail direct injection engine. In this regard, 1-hexanol has been selected as the blending constituent for the WPO to tackle emission challenges while concurrently reducing dependence on conventional fuel, as it stands out for its enhanced fuel properties compared to lower alcohols. Simultaneously, the investigation took into account the influence of varying exhaust gas recirculation (EGR) rates. Experimental scrutiny centers on 10 to 30% by volume of 1-hexanol content with the WPO blends for the engine running at 2000 rpm at 20 to 80% of engine load. The inclusion of 1-hexanol led to a maximum cylinder pressure of 86.42 bar, a heat release rate of 117.43 J/degree, and a brake thermal efficiency of 42.1%. Brake-specific energy consumption values decreased with increasing hexanol concentration, demonstrating improved fuel economy. However, emission analysis revealed that HC emissions increased with the hexanol concentration, reaching a maximum of 45 PPM for the H30WPO70 blend at low loads. Similarly, CO emissions were highest for the H30WPO70 blend, with a peak value of 0.40%vol at 20% load. NOx emissions, on the other hand, decreased with increasing hexanol content and EGR rates with a reduction of 11.3 and 12.55% at 10 and 20% EGR respectively. Thus, the comprehensive investigation of 1-hexanol augmentation in waste plastic oil provides the intricate details of combustion processes and performance metrics with emission profiles, which entail the 1-hexanol integration as an effective means for characteristic improvement of automotive engines.

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  • Waste plastic oil can exhibit fuel properties comparable to conventional diesel or gasoline, depending significantly on plastic feedstock composition and pyrolysis process parameters.

    “Waste plastic oil (WPO) can exhibit fuel properties comparable to conventional diesel or gasoline, depending significantly on the plastic feedstock composition and pyrolysis process parameters [326,327].”

    From Biofuels, E-Fuels, and Waste-Derived Fuels: Advances, Challenges, and Future Directions (2025) · cites this paper as [327]

    The Introduction (page unavailable) says WPO’s thermophysical properties are mostly similar to those of conventional fuels, and Table 2 compares this study’s WPO with diesel. The Extraction of Waste Plastic Oil section (page unavailable) identifies the mixed-plastic feedstock and pyrolysis conditions, but does not establish that changes in feedstock composition or process parameters significantly affect fuel properties. The paper also does not compare WPO’s properties with gasoline. (LLM, conf=0.86)

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Cited by

Sorted by citations

Authors
Chaitanya, A. V. K., & Mohanty, D. K.
Affiliations
VIT-AP University (IN)
Corresponding author
Mohanty, Dillip Kumar
ORCID
Mohanty, Dillip Kumar
Venue
ACS Omega
Publisher
American Chemical Society (ACS)
Published
2024-12-20
Volume
10
Issue
1
Pages
456-472
ISSN
2470-1343 (ISSN-L)
DOI
10.1021/acsomega.4c06693
PMC
PMC11740376
OpenAlex
W4405646147
Cited by
6
References
0
Citations by year
2026: 2 · 2025: 4
FWCI
0.84
Type
journal article
Language
en
Open access
Licence
Locations
  • ACS Omega (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Topics
  • Physical Sciences › Chemical Engineering › Fluid Flow and Transfer Processes › Advanced Combustion Engine Technologies
  • Physical Sciences › Engineering › Biomedical Engineering › Biodiesel Production and Applications
  • Physical Sciences › Engineering › Automotive Engineering › Engine and Fuel Emissions
Keywords
1-hexanol, waste plastic oil, biofuel blends, common rail direct injection diesel engine, exhaust gas recirculation, combustion characteristics, engine performance, NOx emissions, carbon monoxide emissions, hydrocarbon emissions, brake thermal efficiency, brake specific energy consumption, heat release rate, cylinder pressure

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