Naslov
Biodiesel purification: real-world examples, case studies, and current limitations

Autori
Šalić, Anita ; Zagajski Kučan, Kristina ; Gojun, Martin ; Rogošić, Marko ; Zelić, Bruno

Vrsta, podvrsta i kategorija rada
Poglavlja u knjigama, znanstveni

Knjiga
Sustainable Biodiesel Real-World Designs, Economics, and Applications

Urednik/ci
Tabatabaei Maisam ; Nizami, Abdul-Sattar

Izdavač
Academic Press, Elsevier

Grad
London, United Kindgdom

Godina
2024

Raspon stranica
185-238

ISBN
978-0-12-820361-3

Ključne riječi
Biodiesel, purification, examples, limitations

Sažetak
At the end of the biodiesel synthesis process, there is still additional work to obtain the final, pure product that can be used in everyday life. Raw, crude biodiesel consists of undesirable products such as free fatty acids, soap, excess methanol, and catalyst. They must be removed before biodiesel meets the standards proposed by ASTM D6571 or EN14214 or specific regional regulations. Many conventional and unconventional technologies can be used for biodiesel separation (gravitational settling and filtration) and purification. Some of the purification methods are wet washing (water, acidified water, or organic solvents), dry washing (adsorption or ion exchange), distillation (including reactive distillation), and membrane separation. In practice, a combination of techniques is usually required to obtain the desired biodiesel quality, and different approaches are chosen depending on the biodiesel production process. In comparison, enzymatically catalyzed biodiesel production by transesterification does not result in soap formation, and the purification process is somewhat simpler than the chemically catalyzed counterparts. Considering all the aspects mentioned earlier, as well as process duration and energy consumption, these downstream processes are usually the reason why the price of biodiesel produced per gallon (from USD 1.5 to 2.50) is still higher than that of petroleum- based diesel (from USD 0.20 to 0.82). It is estimated that these downstream processes account for 80% of the total processing costs.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

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