Prediction of performance and exhaust emissions of a CI engine fueled with multi-wall carbon nanotube doped biodiesel-diesel blends using response surface method

Solmaz, Hamit; Ardebili, Seyed Mohammad Safieddin; Calam, Alper; Yılmaz, Emre; İpci, Duygu

doi:10.1016/j.energy.2021.120518

Cited by 59 publications

(9 citation statements)

References 89 publications

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“…As shown, the p < 0.0001 of this mode and the p = 0.7258 for the lack-of-fit value indicate insignificant effects of deviation and suggest a fitted model [ 32 ]. Besides, the difference of less than 0.2 between the Pred R 2 and Adj R 2 values also indicates a good correlation between the predicted and actual cCPP extraction yields [ 33 ].…”

Section: Resultsmentioning

confidence: 99%

Ultrasonic-Assisted Extraction of Codonopsis pilosula Glucofructan: Optimization, Structure, and Immunoregulatory Activity

Jiao

et al. 2022

Nutrients

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In recent years, multiple edible polysaccharides from Codonopsis pilosula were mainly isolated with high average molecular weights and exhibited various bioactivities, but it was proven that low-molecular-weight polysaccharides could exert stronger activities due to the superior water solubility and permeability. In the present study, the water-soluble polysaccharide C. pilosula with low molecular weight was isolated under ultrasonic assistance at 30 °C, the extraction process was optimized via response surface method (RSM), and the structure and immunoregulatory activity were further investigated. The maximum yield (4.86%) for crude polysaccharides (cCPPs) was obtained under following parameters: ultrasonic power of 370 W, liquid/material ratio of 33 mL/g, ultrasonic time of 81 min. Subsequently, the cCPPs were further purified through dialysis and Sephadex G-25 column to acquire purified polysaccharide (CPPs). Structural analysis indicated that CPPs was a glucofructan (average molecular weight of 4.23 × 103 Da) with (2→1)-β-D-Fruf and (1→)-α-D-Glcp as the backbone branched by (2→6)-β-D-Fruf. Additionally, CPPs could enhance immunoregulatory function by stimulating NO production and cytokine (IL-6 and TNF-α) secretion of RAW264.7 macrophages dose-dependently, which presented no cytotoxic effects. These data suggest that CPPs have the potential to be used as a nutritional dietary compound and natural immunostimulant supplement in the food industry.

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Section: Resultsmentioning

confidence: 99%

Ultrasonic-Assisted Extraction of Codonopsis pilosula Glucofructan: Optimization, Structure, and Immunoregulatory Activity

Jiao

et al. 2022

Nutrients

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“…The p value of lack of fit was 0.7268, which also suggested a fitted model [ 28 ]. Besides, statistical indicators, including R 2 , Adj R 2 , Pred R 2 , and CV values, were 0.9752, 0.9504, 0.8935, and 3.18, respectively, and the difference of Pred R 2 and Adj R 2 was less than 0.2 (0.0569), indicating a good correlation between actual and predicted values [ 29 ]. The parameters, including A , B , C , D , AD , BC , BD , A 2 , B 2 , C 2 , and D 2 , exhibited remarkable differences ( p < 0.05) to SMGP yields, which was a similar tendency observed in a previously reported paper [ 30 ].…”

Section: Resultsmentioning

confidence: 99%

Preparation, Antioxidant and Immunoregulatory Activities of a Macromolecular Glycoprotein from Salvia miltiorrhiza

Dai

Liu

et al. 2022

Foods

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Salvia miltiorrhiza has exhibited various bioactive functions due to the existence of polysaccharides, hydrophilic phenolic acids, diterpenoid quinones, and essential oils. However, little research has reported the glycoprotein preparation and corresponding bioactivities. In this study, the water-soluble glycoprotein from S. miltiorrhiza roots was firstly isolated with the extraction process optimized by response surface methodology, and then, the preliminary structural properties, and the antioxidant and immunoregulatory activities were investigated. Results showed that the extraction conditions for higher extraction yields were identified as follows: ultrasonic power of 220 W, ultrasonic time of 2.0 h, extraction temperature of 60 °C, liquid/solid ratio of 20 mL/g, and the glycoprotein yields of 1.63 ± 0.04%. Structural analysis showed that the glycoprotein comprised protein and polysaccharide (contents of 76.96% and 20.62%, respectively), with an average molecular weight of 1.55 × 105 Da. Besides, bioactivities analysis showed that the glycoprotein presented strong scavenging effects on multiple free radicals, and effectively enhanced the antioxidant enzyme activities and immunological indicators in cyclophosphamide-induced immunocompromised mice dose-dependently. These data demonstrated that S. miltiorrhiza glycoprotein presented the potential to be a novel edible functional compound, and could be practically applied in the food industry.

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“…Moreover, the regression models were obtained for all responses at 95% level of confidence to be e fuel energy content has a direct impact on BSFC [17,18] which represents the ratio between consumption of fuel mass and BP [19]. Brakespecific fuel consumption can be considered as one of the significant factors when operating the engine using different fuels, which indicates the suitability of fuels [20]. It can be considered to evaluate the different fuel combustion efficiency to produce engine power in different engine speed as seen in Figure 3.…”

Section: Model Fittingmentioning

confidence: 99%

Optimization of SI Engine Performance Operating with Low Octane Gasoline and Fuel Additives from Waste

Ali

Köten

Alwan

2022

Mathematical Problems in Engineering

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Fuel additives from waste have been suggested to enhance low octane commercial gasoline in this study. Four samples were prepared in addition to pure commercial gasoline and denoted as GF0, GF4, GF8, GF12, and GF 16 which refer to fusel oil addition ratio of 0%, 4%, 8%, 12, and 16% respectively. Engine speed was controlled and increased manually from 1000 rpm to 3000 rpm at an increment of 500 rpm. Design of experiments is used to indicate the optimum additive dosage through response surface method optimization. Obtained results show that increasing engine speed significantly impacts the engine brake power, brake-specific fuel consumption, and brake thermal efficiency with a slight change for fusel oil ratio. Accordingly, it can be concluded that the maximum increase in output variables is statistically linked with the engine speed. The output response values at optimized conditions were 2.61812 kW brake power, 0.2431 kg/kW.hr brake-specific fuel consumption, and 36.5303% brake thermal efficiency. Based on the P-value, ANOVA data indicate that engine speed was a significant factor influencing output responses, while the fusel oil ratio was insignificant. However, fusel oil ratio of 8% has a significant effect on the brake thermal efficiency and BSFC.

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Prediction of performance and exhaust emissions of a CI engine fueled with multi-wall carbon nanotube doped biodiesel-diesel blends using response surface method

Cited by 59 publications

References 89 publications

Ultrasonic-Assisted Extraction of Codonopsis pilosula Glucofructan: Optimization, Structure, and Immunoregulatory Activity

Ultrasonic-Assisted Extraction of Codonopsis pilosula Glucofructan: Optimization, Structure, and Immunoregulatory Activity

Preparation, Antioxidant and Immunoregulatory Activities of a Macromolecular Glycoprotein from Salvia miltiorrhiza

Optimization of SI Engine Performance Operating with Low Octane Gasoline and Fuel Additives from Waste

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