Tài liệu, tai lieu

The effect of combustion temperature to low-Tar gas production using oxygen-enriched air - Dinh Quoc Viet
The effects of combustion temperature on the tar formation and the syngas composition using oxygenenriched air were studied experimentally in a pilot scale two-stage biomass gasification system with different oxygen-enriched air. In this study, the oxygen level in the gasifying agent was increased from 21 to 42 vol.%. The experiments of severa...
6 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 902 | Lượt tải: 0
A quantum chemical computation insight into the donor-Acceptor bond interaction of silver complexes with tetrylene - Tran Duc Sy
DFT calculations find that the equilibrium structures of the Ag-NHE show major differences in the bonded orientation of NHPb ligand in Ag-NHPb compared with NHE ligands the slighter homologues Ag-NHE (E= C-Sn). The BDE results show that the Ag-carbene bond in Ag-NHC is very strong bond and decreases from the slighter to the heavier homologue...
8 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 951 | Lượt tải: 0
Preparation of some new benzo[d]thiazole derivatives - Duong Quoc Hoan
The most difficult assignment was identification of C13/C19 and H13/H9. Fortunately, it was easily to find H14 that had an HMBC cross-peak with H9. Therefore, H13 and C13 were identified and so on. Other assignments were shown in the figure 2. Finally, compounds 3, 4, 5 and 6 were recorded for mass spectroscopy. MS spectrum of compound 3 ind...
5 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 1058 | Lượt tải: 0
Membrane distillation for seawater desalination applications in vietnam: potential and challenges - Duong Cong Hung
Seawater desalination using membrane distillation (MD) can be a pragmatic solution to fresh water scarcity in Vietnam. As a hybrid desalination process, MD inherits attributes of both pressure-driven membrane separation and thermal distillation. These attributes include process modularization, low susceptibility to feed osmotic pressure, low ris...
24 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 1146 | Lượt tải: 0
Study on change of color and some properties of high density polyethylene/organo-Modified calcium carbonate composites exposed naturally at Dong Hoi - Quang Binh - Le Duc Minh
In this work, the influence of climate and weather factors and natural exposure time at Dong Hoi (Quang Binh) on UV-Vis spectra, the change of color, and electric properties of HDPE/m-CaCO3 composites were investigated. The UV-Vis spectra showed the formation of carbonyl groups and vinyl groups in HDPE macromolecules of the composites by the...
7 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 753 | Lượt tải: 0
Synthesis of bio-Polyols by epoxide ring opening reaction with H2O as a reagent - Nguyen Thi Thuy
The hydroxylation reaction was carried out in 9 hours at 70 oC temperature, 2000 rpm stirring speed, the molar ratio of ESO:H2O and the concentration of catalyst H2SO4 were fixed at 1:15 and 8 wt.% respectively. The progress of reaction was monitored by measuring the oxirane and the hydroxyl content of the product. The results are shown in Fi...
6 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 952 | Lượt tải: 0
Lignans isolated from the ethyl acetate extract of Knema pachycarpa fruit - To Hai Tung
Compound 4 was obtained as a white solid, mp 160-161 oC. In the NMR spectrum, the proton signals of aromatic ring are similar to those of compound 3 (piperitol) with 6 proton signals in the aromatic region, a methylene dioxide, a hydroxyl and a methoxy group at δH 5.94 (2H, s), 5.76 (1H, s) and 3.91 (3H, s). However, the remaining protons si...
5 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 903 | Lượt tải: 0
The effect of polyamine 70000 (BT70) on the zinc plating process in the non-Cyanide alkaline plating bath - Truong Thi Nam
The obtained results showed that the BT70 had significant effect on the zinc plating in the noncyanide alkaline plating bath. The results of Hull method indicated that BT70 made the zinc deposited coating became smoother and had better distribution. The zinc deposited became glossier if the BT70 content increased. Moreover, BT70 also affected ...
6 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 723 | Lượt tải: 0
Treatment of Cd2+ ions using aluminum doped hydroxyapatite (AlHAp) powder - Nguyen Thi Thom
The current work provided Cd2+ ions removal process using aluminum doped hydroxyapatite. The results show that 0.1 g AlHAp powder can remove 97 % Cd2+ from 50 ml of 281 mg/L Cd(NO3)2 solution with the adsorption capacity of 135 mg/g. The adsorption experiment data displays a good fit by the pseudo-second-order law model with the high interre...
7 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 730 | Lượt tải: 0
Tổng hợp điện hóa màng natri hydroxyapatit trên nền thép không gỉ 316L - Võ Thị Hạnh
Đã tổng hợp thành công màng NaHAp bằng phương pháp quét thế catôt. Màng NaHAp tổng hợp được có dạng hình phiến, đơn pha, đồng nhất với kích thước khoảng 150 × 25 nm, chiều dày màng 7,8 µm, độ bám dính giữa màng và nền đạt 7,16 MPa; Trong dung dịch điện li có nồng độ NaNO3 0,06 M, màng NaHAp thu được có hàm lượng Na gần giống hàm lượng Na có ...
7 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 686 | Lượt tải: 0

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