Insights into the influence of n‐butanol with neat biodiesel and biodiesel‐diesel blends on diesel engine characteristics: Review

Abstract

Summary The dependence on petroleum has been escalating owing to the proliferation of energy demands and population. Environmental degradation and depletion of petroleum resources are motivated to search the clean energy fuels for diesel engines. Recent studies have been advocated biodiesel as a strong contender to diesel fuel for diesel engines. Despite the significant development in the biodiesel field, there are still issues related to the usage of biodiesel in diesel engines. To overcome these issues, n‐butanol is identified as a biofuel additive that can improve the properties of biodiesel and its blends. The objective of this review is to compare the effect of the butanol–biodiesel (Bu/B), butanol‐biodiesel‐diesel (Bu/B/D), and biodiesel‐diesel (B/D) blends on the performance, combustion, and emission characteristics of diesel engines. Performance characteristics for Bu/B/D blends were observed remarkable than Bu/B and B/D blends, however, slightly inferior to diesel fuel. Combustion parameters of Bu/B/D blends were analogous to B/D blends however superior to Bu/B. Emission characteristics were reduced to a great extent with Bu/B/D blends as compared to all other sample fuels. This article also analyses the overview of biobutanol production from lignocellulosic biomass by acetone‐butanol‐ethanol fermentation process. Finally, this study reports that butanol has the potential, which can help to sustain engine performance and mitigate emissions. Among all the Bu/B, Bu/B/D, and B/D blends, Bu/B/D blends provide better fuel quality and significant results from the diesel engine characteristics; however, up to 20% blending of butanol with B/D blends showed better results after that engine performance decreased.

Efficacy of performance and mitigate pollution of CI engine: Delonix regia biodiesel with n‐butanol and exhaust gas recirculation

“…The smoke opacity emissions for DRB10 D90, DRB10 BUT10 D80, and DRB10 BUT20 D70 experienced mean value increases of 10.30%, 14.82%, and 28.86% respectively. The extended ignition delay observed in the n‐butanol blends leads to enhanced air entrainment, a desirable characteristic for achieving effective premixing 18 . Consequently, this phenomenon contributes to a reduction in opacity emissions in the exhaust.…”

“…The extended ignition delay observed in the n-butanol blends leads to enhanced air entrainment, a desirable characteristic for achieving effective premixing. 18 Consequently, this phenomenon contributes to a reduction in opacity emissions in the exhaust.…”

“…The utilization of butanol–diesel blends, containing a maximum of 40% butanol, has demonstrated the potential for effective implementation in unmodified diesel engines 17 . After conducting a thorough review of multiple research articles pertaining to the impact of n‐butanol on the characteristics of diesel engines when used with neat biodiesel and biodiesel–diesel blends, it was observed that a 20% blending ratio of butanol with biodiesel blends yielded superior engine performance and reduced exhaust emissions 18–22 . n‐butanol exhibits several advantageous properties in comparison to other compounds.…”

“…17 After conducting a thorough review of multiple research articles pertaining to the impact of n-butanol on the characteristics of diesel engines when used with neat biodiesel and biodiesel-diesel blends, it was observed that a 20% blending ratio of butanol with biodiesel blends yielded superior engine performance and reduced exhaust emissions. [18][19][20][21][22] n-butanol exhibits several advantageous properties in comparison to other compounds. It possesses a higher heating value, lower volatility, reduced likelihood of ignition issues, inter solubility, increased viscosity, a low vapor pressure point, a high flash point, diminished corrosiveness, and a higher energy output.…”

Unveiling the microwave heating performance of biochar as microwave absorber for microwave-assisted pyrolysis technology

“…Improper waste management and dependency on fossil fuels are still global concerns contributing to severe socioeconomic and environmental challenges 1 , 2 . Several nations have implemented strict regulations for waste collection, segregation, and disposal.…”