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LỜI CAM ĐOAN LỜI CAM ĐOAN LỜI CAM ĐOAN LỜI CAM ĐOAN Luận án sử dụng một phần kết quả của đề tài cấp Nhà nƣớc: “Nghiên cứu công nghệ sản xuất và ứng dụng chế phẩm sinh học từ thực vật có chứa các hoạt chất: cacbua tecpenic, xeton sesquitecpenic và turmeron trong bảo quản quả tươi sau thu hoạch” mã số ĐTĐL. 2008T16 do PGS. TS Nguyễn Thị Kim Cúc làm chủ nhiệm. Tôi xin cam đoan các số liệu và kết quả nghiên cứu trong luận án này là trung thực và chƣa từng đƣợc các tác giả khác công bố trong các luận văn, luận án nào và đã đƣợc chủ nhiệm đề tài cho phép sử dụng vào luận án này. Tôi xin cam đoan mọi sự giúp đỡ trong việc hoàn thành luận án đã đƣợc cảm ơn và các thông tin trích dẫn trong luận án đã đƣợc ghi rõ nguồn gốc. Tôi xin hoàn toàn chịu trách nhiệm về những số liệu trong luận án này. Hà Nội, ngày tháng năm 2014
[...]... microorganisms to feed on and thus destroy the VOCs And catalytic oxidizers use a catalyst to promote the reaction of the organic compounds with 16 oxygen, thereby requiring lower operating temperatures and reducing the need for supplemental fuel Destruction efficiencies are typically near 95%, but can be increased by using additional catalyst or higher temperatures (and thus more supplemental fuel)... phase and support is detached from substrate‟s surface Nevertheless, compared with the number of studies of catalyst‟s composition, the investigation o n deposition method hasn‟t attracted much attention Thus, in this thesis, the method of impregnation process would be studied systematically to prepare the catalytic complexes The goal of this thesis is “Study on the loading procedures of the support on... Pt-group by transition metals as active phase in catalytic converters Many investigations both in the world and Vietnam proved the high ability of Co, Ni, Mn or Cu… for the conversion of CO, NO x and HC Thus, it may be possible to prepare the inexpensive, effective catalytic converters for a developing country like Vietnam with the use of these transition metals The catalytic activity is influenced by... in treatment process are: Reduction reaction: NO → ½ N 2 + ½ O 2 Oxidation reactions: CO + ½ O 2 → CO2 Cx Hy + (x+y/4) O 2 → x CO2 + y/2 H2 O Steam formed in process reacts with CO to form CO 2 and H2 Thus, some byreactions occur: CO + H2 O → CO2 + H2 NO + 5/2 H2 → NH3 + H2O NH3 + 5/4 O 2 → NO + 3/2 H2 O In this method, reduction converter only operates well in excess fuel condition Furthermore, NH3... metals (Cu, Ni, Mn, Co…) has attracted the attention for its high efficiency and low cost As mentioned above, the γ-Al2 O3 plays an important role of dispersion noble metals‟ crystallite as catalytic sites Thus, γ-Al2 O3 has been used as the most popular support material for years However, the excellent properties of CeO 2 or Cex Zr1-x O2 make this substance plays not only as the support material but also... Pore volume (Hg porosimetry, mL/g) 0.19 Pore volume (N 2 BET, mL/g) Surface area (N 2 BET, mL/g) ≤4 As the cordierite mineral is not abundant, for industrial production usually it has to be synthesized Thus, there are many raw materials that may be used for the preparation of cordierite monoliths where the employment of aluminum silicates, such as kaolin or clays, and the use of talc together with alumina... ceria This material has been investigated since the early 1990 and is now generally known tha t the incorporation of zirconium into the ceria lattice creates a higher concentration of defects improving, thus, the O 2 mobility; such mobility would explain the outstanding ability to store and release oxygen [28] Many researchers have reported the phase diagrams of promoters for TWC, phase diagram of Cex... in a H2 /Ar mixture of Rh- loaded CeO 2 ZrO 2 solid solution with a ZrO 2 content varying between 10 and 90% mol was carried out It is shown that incorporation of ZrO 2 into solid solution with CeO 2 strongly promotes bulk reduction of the Rh- loaded solid solution in comparison to a Rh/CeO 2 sample In the reaction of reduction NO by CO, bulk oxygen vacancies play an important role of in promoting NO... prepared by Guo Jiaxiu et al Ce0.35 Zr0.55 Y0.10 had cubic structure similar to Ce0.5 Zr0.5 O2 and its specific surface area can maintain higher than Ce0.5 Zr0.5 O2 after 10000 C calcinations for 5h [37] Thus, these materials are suitable to prepare a motorcycle catalyst that can work at high space velocities and larger fluctuations of the air-to- fuel ratio 1.2.2.3 Al2 O3 – CeO2 – ZrO2 materials Recently... parameter of the ACZ samples is less than that of the CZ sample It is plausible that the CeO 2 , ZrO 2 and Al2 O3 are well dispersed at the nanometer level and can serve as a barrier to each other and thus sintering is impeded [38] Al2 O 3 – CeO 2 – ZrO 2 –support exhibits the following properties: - Texture properties Specific surface area and pore volume both increase with Al2 O3 content increasing . CATALYTIC COMPLEXES FOR THE TREATMENT OF MOTORBIKE’S EXHAUSTED GASES Chuyên ngành: Kỹ thu t hóa học Mã số: 62520301 DOCTOR OF PHILOSOPHY THESIS: CHEMICAL ENGINEERING . the scientific work but also in my private life. Without her guidance, her encouragement, her enthusiastic and kind help, it would have been difficult to overcome the difficulties I met during. and Vietnam proved the high ability of Co, Ni, Mn or Cu… for the conversion of CO, NO x and HC. Thus, it may be possible to prepare the inexpensive, effective catalytic converters for a developing