NGHIÊN CỨU CHIẾT TÁCH DẦU TỪ SINH KHỐI VI TẢO HỌ BOTRYOCOCCUS SP LÀM NGUYÊN LIỆU CHO QUÁ TRÌNH TỔNG HỢP BIODIESEL

This study examines the effects of various solvents, temperature, and reaction time on oil extraction yield from microalgae Botryococcus sp biomass. Different solvents were used separately or in combination such as n-hexane, n-heptane, toluene, ethanol, iso-propanol, mixture of n-hexane/etanol and the mixture of n-heptane/iso-propanol. The results showed that with different conditions, the extraction yield was varied and the highest yield (37.36%) can be achived by using the solvent mixture of n-hexane/ethanol 2:1 (v/v) at temperature of 60ºC for 10h

Nghiên cứu ảnh hưởng của tỷ lệ tiền chất/ammoniac đến cấu trúc vật liệu chứa nanosilica

This study aimed to determine effect and relation between tetraethyl orthosilicate precursor (TEOS) and NH3 catalyst for nanostructured silica preparation through condensation method, based on their molar ratio. The nanostructured silica was prepared in mixed solution of NH3, ethanol, water with previous given calculations. The preparation was established at room temperature for 12 hours followed by filtering the as-synthesized precipitate. The precipitate was then dried and calcinated at 120 oC for 12 hours and at 600 oC for 3 hours, respectively for the final nanosilica containing products. A series of nanosilica containing samples were studied based on the molar ratios of TEOS/NH3, and the sample with the finest morphology was chosen for further characterizations. As the obtained results, the chosen sample with TEOS/NH3 of 1.5/1 existed in amorphous phase with particle size ranging from 12 nm to 25 nm. Some techniques were used such as SEM, TEM, EDX, FT-IR and UV-Vis for characterizing the morphology, element percentage, functional groups and silica absorption band respectively of the as-synthesized material

Hoá học dầu mỏ và khí : Dùng làm tài liệu giảng dạy cho sinh viên Đại học Bách khoa và các trường khác

250 tr. ; 24 c

Hoá học dầu mỏ và khí : Dùng làm tài liệu giảng dạy cho sinh viên Đại học Bách khoa và các trường khác

250 tr. ; 24 c

Các quá trình xử lý để sản xuất nhiên liệu sạch

155 tr. : minh hoạ ; 24 cm

Hoá học dầu mỏ & khí

335 tr. ; 24 cm

Ảnh hưởng của phương pháp tổng hợp đến tính chất cấu trúc của nhôm oxit. Tiềm năng ứng dụng làm chất mang của nhôm oxit mao quản trung bình có trật tự

In the present work, the synthesis methods of alumina as a support for catalytic applications have been carried out by us. We show that the synthetic way to alumina is the starting point that determines the micro- and macrostructure of the oxide and, consequently, allows control of the support characteristics. Usually, conventional aluminas with surface areas of 50 - 300 m2/g are manufactured by precipitation method. Transition aluminas (α, γ, δ, η, θ) that were prepared by heat treatment of different aluminium oxide-hydroxide precursors (e.g. boehmite, pseudoboehmite, bayerite, nordstrandite) usually exhibit surface areas lower than 350 - 400 m2/g and their main disadvantage is in their broad pore size distribution. Recently, well-ordered mesoporous aluminas with surface areas exceeding 350 m2/g and having narrow pore size distribution were synthesized in our laboratory. This support exhibited significantly higher capacity for dispersion of active species than the conventional alumina and they have a certain potential in catalytic applications

Các quá trình xử lý để sản xuất nhiên liệu sạch

155 tr. : minh hoạ ; 24 cm

Nghiên cứu tổng hợp biodiesel từ dầu ăn phế thải trên xúc tác dị thể MgSiO3.

Currently, biodiesel was manufactured mainly from edible oils having high price, on homogeneous catalysts, un-regeneration, difficult separation, lesser effective economics and polluted environment. Therefore, the cheap new raw material such as waste oil and heterogeneous catalysts has been found to get over the above disadvantages. On advance works gived out  methods of waste oil treatment. This news, searched to synthesize biodiesel from waste oil treated, on catalysis MgSiO3