Post-harvest waste to value-added materials: Musa champa plant as renewable and highly effective base catalyst for Jatropha curcas oil-based biodiesel production

Basumatary, Bhimraj; Brahma, Sujata; Nath, Biswajit; Basumatary, Siri Fung; Das, Bula; Basumatary, Sanjay

doi:10.1016/j.biteb.2023.101338

Cited by 15 publications

(14 citation statements)

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“…The lower alkalinity of C-45 compared to C-Mix may be due to the presence of unburned char, which reduces the relative composition of metallic carbonates and oxides. The lower leachable and total alkalinities of the bifunctional catalysts (Bic-Dm and Bi-PP) are probably due to the presence of the amphoteric t-ZrO 2 and lower concentration of K-containing compounds . In all cases, the total alkalinity is lower than the leachable alkalinity (LB) maybe because of the catalysts’ very low surface area (<3 m 2 /g).…”

Section: Results and Discussionmentioning

confidence: 62%

“…The C-Mix catalyst has the highest leachable and total alkalinity values. The highest alkalinity of the C-Mix catalyst was due to high quantities of K, C, and O in the form of carbonate of K and other metals . Alkali silicates, mainly potassium silicate as indicated in the XRD analysis of C-Mix (Figure ), may also be the reason for the strong alkalinity .…”

Section: Results and Discussionmentioning

confidence: 97%

“…According to Sharma et al, chemically activated wood ash (calcined at 800 °C) loaded with K 2 CO 3 and CaCO 3 produced 12.7 and 8.8 mmol/g of soluble alkalinity, respectively, which are greater than catalysts in this work. In another study, it was reported that the estimated leachable alkalinity values of Musa Champa peel, stem, and rhizome ash catalysts were found to be 7.13, 4.77, and 5.21 mmol/g, respectively, which are lower than the alkalinity of alkali catalysts and close to bifunctional catalysts in this study …”

Section: Results and Discussionmentioning

confidence: 99%

“…The highest alkalinity of the C-Mix catalyst was due to high quantities of K, C, and O in the form of carbonate of K and other metals. 49 Alkali silicates, mainly potassium silicate as indicated in the XRD analysis of C-Mix ( Figure 6 ), may also be the reason for the strong alkalinity. 8 The lower alkalinity of C-45 compared to C-Mix may be due to the presence of unburned char, which reduces the relative composition of metallic carbonates and oxides.…”

Section: Results and Discussionmentioning

confidence: 99%

“…In another study, it was reported that the estimated leachable alkalinity values of Musa Champa peel, stem, and rhizome ash catalysts were found to be 7.13, 4.77, and 5.21 mmol/g, respectively, which are lower than the alkalinity of alkali catalysts and close to bifunctional catalysts in this study. 49 FTIR Analysis of Catalysts. All catalysts have similar FTIR spectra, except for a few differences.…”

Section: Methodsmentioning

confidence: 99%

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Catalytic Performance Investigation of Alkali and Bifunctional Catalysts Derived from Lignocellulosic Biomasses for Biodiesel Synthesis from Waste Frying Oil

Bekele,

Shibeshi,

Reshad

2024

ACS Omega

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In this study, alkali and bifunctional catalysts were synthesized for waste frying oil methyl ester (WFOME) synthesis. Coffee husk (CH) and CH blended with Eragrostis tef straw (TS) (CH−TS) lignocellulosic biomasses (LBs) were utilized during the catalysts' synthesis. The alkali catalysts were CH and CH−TS ashes, both modified by KNO 3 impregnation. They are designated as C-45 and C-Mix, respectively. Zirconia (ZrO 2 ) promoted CH ash catalysts via precipitation followed by impregnation (Bic-PP) and in situ precipitation−impregnation (Bic-Dm) were the bifunctional ones. CH and CH−TS chars were the supporting frameworks during the catalysts' composite materials (CCMs) preparation. The combustion performance of LBs and CCMs was evaluated and associated with the catalysts' physicochemical properties. Using XRD, SEM, FTIR, alkalinity, TOF, and BET surface area analysis, catalysts were characterized. The combustion performance of the LBs was in the order of TS > CH−TS > CH. Among CCMs, the highest combustion performance was for CCM-Mix (KNO 3 /(CH−TS char)) and the lowest was for CCM-45 (KNO 3 / CH char). The C-Mix catalyst was a light green powder due to the reaction between inorganic components, whereas C-45 was dark gray due to the presence of unburned char. The CCMs for bifunctional catalysts had moderate combustion performance and yielded light gray powdered catalysts containing tetragonal ZrO 2 . The optimum WFOME yields were 98.08, 97, 92.69, and 93.05 wt % for C-Mix, C-45, Bic-Dm, and Bic-PP assisted WFO transesterification, respectively. The results were obtained at a reaction temperature of 65 °C, time of 1 h, and methanol to WFO molar ratio of 15:1 using catalyst amounts of 5 and 7 wt % for the alkali and bifunctional catalysts, respectively. The greatest moisture resistance was offered by the C-Mix catalyst. The best reusability was for the C-45 catalyst. Catalysts' deactivation modes include active site leaching and poisoning.

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Section: Results and Discussionmentioning

confidence: 62%

Section: Results and Discussionmentioning

confidence: 97%