Lipid-dense and pre-functionalized post-hydrolysis spent coffee grounds as raw material for the production of fatty acid methyl ester
نویسندگان
چکیده
In this study, lipid-dense post-hydrolysis spent coffee grounds (PHSCG), containing ~23 wt% lipid, was utilized as feedstock in the production of fatty acid methyl esters (FAME) via in-situ (trans)esterification (ISTE). The collected PHSCG were pre-functionalized (~0.86 mmol H+/g dried, lipid-free PHSCG) after sufficient drying wet residues obtained from dilute hydrolysis (DAH) (SCG). Taguchi method and regression analysis adopted optimization ISTE, with temperature, solvent-to-solid ratio (SSR), reaction time, main factors investigated. An optimum yield 19.47 ± 2.44 g FAME/100 PHSCG, corresponding to ~96% conversion, could be achieved during ISTE a batch reactor system. lipids carried out without catalyst addition due inherent catalytic activity PHSCG. Elemental FT-IR analyses conducted determine extent functionalization. strong density material increased 21.5 times upon DAH. Although, some functionalized solubilized post-ISTE residue still had significant site, 2.47 native SCG, exhibited appreciable when used solid for esterification oleic methanol while having good stability. DAH subsequent induce simultaneous carbonization sulfonation, may means generating raw materials biodiesel lipid-containing lignocellulosic like SCG.
منابع مشابه
Effect of Temperature on Acid Hydrolysis of Jerusalem Artichoke as Raw Material for Ethanol Production
Jerusalem artichoke (JA) is a low-requirement crop, which does not interfere with food chain, and is a promising carbon source for industrial fermentation. Microbial conversion of such a renewable raw material to useful products, such as ethanol, is an important objective in industrial biotechnology. In this study, ethanol was efficiently produced from the hydrolyzates of JA obtained at differe...
متن کاملValorisation of spent coffee grounds as CO 2 adsorbents for postcombustion capture applications
In this work spent coffee grounds from single-use capsules were used as the starting material for producing low-cost activated carbons. The activation conditions were selected and optimised to produce microporous carbons with high CO2 adsorption capacity and selectivity, thus with potential to be used as adsorbents in postcombustion CO2 capture applications. Two activation methods are compared:...
متن کاملfaciliting lexical access for the fluent production of speech
the hypothesis is that recent and frequent exposure to lexical items leads to a more fluent production of speech in terms of rate of speech. to test the hypothesis,a one-way anova experimental design was carried out. 24 sednior students of efl participated in a one-way interview test. data analyses revealed that those who were exposed frequently to the lexical items over a week prior to inter...
15 صفحه اولSpent Coffee Grounds as Adsorbents for Pesticide Paraquat Removal from its Aqueous Solutions
Spent coffee grounds were evaluated for adsorption efficiency in the removal of pesticide paraquat from its aqueous solutions. The influence of the adsorbent mass, agitation time, paraquat concentration and pH have been investigated in the batch sorption mode. Adsorption capacity (mg/g) has been found to be 27.87 ± 1.57 mg/g, while the removal efficiency has resulted of 32.25 ± 1.79 %. Adsorpti...
متن کاملfacilitating lexical access for the fluent production of speech
the hypothesis is that recent and frequent exposure to lexical items leads to a more fluent production of speech in terms of rate of speech. to test the hypothesis , a one- way anova experimental design was carried out. 24 senior student of efl participated in a one-way interview test. data analyses revealed that those who were exposed frequently to the lexical items over a week prior to inte...
15 صفحه اولذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Energy Conversion and Management
سال: 2021
ISSN: ['0196-8904', '1879-2227']
DOI: https://doi.org/10.1016/j.enconman.2021.114216