Investigated Cold Press Oil Extraction from Non-Edible Oilseeds for Future Bio-Jet Fuels Production

Abstract

Bio-jet fuel produced from non-edible oilseeds can be an alternative to fossil fuels with the benefits of increasing national energy security, reducing environmental impact, and fostering rural economic growth. Efficient oil extraction from oilseeds is critical for economic production of bio-jet fuels. Oil extractions from camelina (sativa) and canola (Brassica napus) seeds were conducted using a cold press method. The effect of the frequency controlling the screw rotation speed on the oil recovery and quality was discussed. Characterization of the produced raw vegetable oils, such as heating value, elemental content and main chemical compositions, was carried out. The results showed that the oil recovery increased when the frequency decreased. The highest oil recoveries for camelina and canola seeds were 88.2% and 84.1% respectively, both at 15 Hz. The cold press frequency and processing temperature (97.2˚C -106.0˚C) had a minor influence on the qualities and recovery of both camelina and canola oils. In addition, camelina and canola oils produced at 15 Hz underwent catalytic cracking to examine potential hydrocarbon fuels production. It was observed that some of oil physicochemical properties were improved after catalytic cracking. Although more study is needed for further improvement of oil recovery and qualities, cold press could be an efficient method for oil extraction from non-edible oilseeds. Additionally, the preliminary results of upgrading the oils produced show very promising for future bio-jet fuels production.

Catalytic cracking of inedible camelina oils to hydrocarbon fuels over bifunctional Zn/ZSM-5 catalysts

“…The density was tested three times by the ratio of sample mass to sample volume at room temperature. The average value of these three tests was used as the density [16].…”

“…The oil extraction was carried out at the Advanced Biofuel Laboratory in the Agricultural and Biosystems Engineering Department, South Dakota State University (SDSU) using a cold press machine (M70 Oil Press, Oil Press Company, Eau Claire, Wisconsin, USA). The camelina oils produced mainly contained linolenic acid, cis-11-eicosenoic acid and stearic acid [16]. After the oil extraction, the produced camelina oils were stored about one month in sealed bottles at room temperature until they were used in the catalytic cracking tests.…”

Üzüm Çeki̇rdek Yaği Eldesi̇nde Kullanilan Ekstraksi̇yon Yöntemleri̇

“…Kullan›m› basit ve kolay olan bu yöntemin, oldukça az miktarda enerji gerektiriyor olmas›, çözgen kullan›lmamas›, di¤er yöntemlerde oldu¤u kadar yüksek s›cakl›klara ç›k›lmamas›, ya¤›n en önemli kalite unsurlar›ndan biri olan yüksek polifenol bilefliklerini koruyarak, bu bilefliklerin do¤al antioksidatif özellikleri sayesinde ya¤da radikallerden kaynaklanan oksidatif bozulmalara engel olmas› so¤uk pres yönteminin önemli avantajlar›ndand›r (22). Öte yandan, so¤uk presle elde edilen ya¤ miktar›n›n di¤er yöntemlere k›yasla daha düflük olmas›na ra¤men (23,24), bu yöntemde herhangi bir kimyasal çözücü kullan›lmad›¤›ndan ürünü kimyasal kontaminasyondan koruyarak tüketicinin arzusunu karfl›layacak derecede güvenli hale getirmektedir (25). Bu yöntem bir di¤er ekstraksiyon yöntemi olan s›cak presleme yöntemi ile k›yasland›¤›nda ya¤ verimi düflük kalmakta fakat s›cak preslemede uygulanan ›s›l ifllemden kaynaklanan istenmeyen renk, koku ve tat bileflikleri oluflmamaktad›r.…”

Liquid Biofuel Production from Palm Oil Using Dual-Function of Zn/HZSM-5 Catalyst

“…One possible reason is that the water content of hydrocarbon biofuel produced without Zn loaded catalyst was higher than that of hydrocarbon biofuel produced with Zn loaded catalyst, as shown in Table 2. The higher water content would result in the lower HHV of the hydrocarbon biofuel 9,15 . As mentioned above, the 15% Zn/HZSM-5 catalyst evidently presented the highest hydrocarbon biofuel yield and excellent properties of biofuel products.…”

“…After the palm oil upgrading, the density of all hydrocarbon biofuels decreased to 0.76-0.84 g/ml, which was lower than the density raw palm oil. During the upgrading process, palm oil triglyceride molecules were decomposed to fatty acids that then underwent chemical reactions such as deoxidation and decarboxylation to form hydrocarbons and/or alcohols 9 . In this study, there was obvious water phase separated from the oil phase while collecting liquid oil, although some chemical reactions such as dehydration could produce water during the cracking of palm oil.…”