The New Fe-cu Catalyst Synthesis Gas Directly On The Synthesis Of Oxygenated Organic Compounds And The Preparation Of Nano-fe-cu Catalytic Materials

The main energy sources are petroleum, coal and natural gas in the world. There exists a big contradiction between the consumption of the main energy sources and their configuration, especially in China, which has abundant coal resources but less petroleum. We should make full of the coal resourses and explore a new technique to satisfy the demand of high-speed economy increasing. Syngas has broad sources, for almost all substances containing carbon can produce it. It is a ripe technic from coal or natural gas to syngas. Higher alcohol composed from syngas can be not only clean fuels, but also can be separated as single alcohol for further utilization, so it has important industrial value.Alcohols can be synthesized on Fe-based catalyst at low temperature and mild operation condition. Fe-based catalyst is made with low cost and ripe technic. Fe-Cu based catalyst is a new system catalyst for higher alcohols, which shows high'activity and good selectivity. For this catalyst prepared by fusion method, the highest productivity reached 1.28 g- ml/1 ?h"1 and the selectivity of C2+OH reached 66 percent.The dissertation explored the optimum process condition after examining the effects of the experiments condition and promoters on the performance of catalyst, which was at 653K, 6MPa, lOOOOh"1. The function of main promoter K is thought to restrain the byproduct DME and improve the selectivity of C2+OH. Another important promoter Al affects as structure promoter to stabilize and disperse the active compounds, so as to enhance the activity for alcohols and the selectivity for Ga+OH. Moreover Al is the key factor that has effects on specfic surface.Dual-function catalyst is made by adding acidic compound into Fe-Cu based catalyst, which is used to synthesize aether and alkene via higher alcohol. This is a new process route on syngas transform. The result indicats that the acidic component enhanced the productivity for ethene and DME. The catalysts containing HZSM-5 is better than that of Y -Al2O3. When the weight ratio of the alcohol catalyst to HZSM-5 is 10:1, the productivty of C2+OH, ethene and DME gets maximum. The addition of HZSM-5 into the catalysts by precipitation also improve their productivity. The highest productivity gets at 4MPa, 623K, 10000h-1, which is 1.49 g- mL-1. h-1 and the selectivityfor C2+OH is above 70%.The conclusion can be drawn that the components of fused catalyst are spinel CuFeO2 and CuFe2O4. Reduced at 673K, they turn to Cu0 and a -Fe, which are probably the active components for synthesizing alcohol. Two desorption peaks .appeared in Eb-TPD of 1* fused catalyst. The first occurred at low temperature. It may be the physical adsorption of hydrogen on the surface of catalyst, so the interaction was weak. The second peak desorped from 573K to 773K, which is chemical adsorption of hydrogen. It showed that different active centers existed in the catalyst. The adsorption of hydrogen on a -Fe resulted the second peak. It is important for the fused catalyst to synthesize alcohols. The dissertation analyzed the products at various temperature with TPSR-MS system and discussed the reaction principle. The active component Cu?interacting with a -Fe created alcohols and the hydrocarbon was due to the function of a -Fe.Microemulsion method which was studied and applied recently to prepare nano-particle was used to prepare ultrafme ferric oxide and copper oxide in this dissertation. It had obvious superorities compared with traditional preparation methods, such as simple operation, narrow dispersion. The dissertation studied the rule of effects of surfactant and organic solvent on the particle radius. Homogeneous steady sol was formed before calcination. After calcination the particles grew up quickly and formed micron level. The adding-mode of the reactants evidently affected the radius of Fe2O3 particles. The positive adding-mode was better.