Various Cu/ZnO/Al2O3 catalysts have been synthesized by different aluminum emulsions as aluminum sources and their pertormances tor methanol synthesis from syngas have been investigated. The influences of preparation ...Various Cu/ZnO/Al2O3 catalysts have been synthesized by different aluminum emulsions as aluminum sources and their pertormances tor methanol synthesis from syngas have been investigated. The influences of preparation methods of aluminum emulsions on physicochemical and catalytic properties of catalysts were studied by XRD, SEM, XPS,N2 adsorption-desorption techniques and methanol synthesis from syngas. The preparation methods of aluminum emulsions were found to influence the catalytic activity, CuO crystallite size, surface area and Cu0 surface area and reduction process. The results show that the catalyst CN using the aluminum source prepared by addition the ammonia into the aluminum nitrate （NP） exhibited the best catalytic performance for methanol synthesis from syngas.展开更多
采用机械共混方式获得Al(OH)3改性丙烯酸酯乳液胶黏剂,研究了分散剂种类及用量、增稠剂用量和Al(OH)3用量对胶黏剂基本性能和流体力学性能的影响。结果表明,在分散剂六偏磷酸钠(SHMP)用量为0.35%、增稠剂羟乙基纤维素(HEC)用量为0.20%...采用机械共混方式获得Al(OH)3改性丙烯酸酯乳液胶黏剂,研究了分散剂种类及用量、增稠剂用量和Al(OH)3用量对胶黏剂基本性能和流体力学性能的影响。结果表明,在分散剂六偏磷酸钠(SHMP)用量为0.35%、增稠剂羟乙基纤维素(HEC)用量为0.20%和阻燃剂Al(OH)3用量为30%时,改性后丙烯酸酯乳液胶黏剂的性能较好,黏度为1 360 m Pa·s,p H值为5.45,贮存30天后稳定性较好,氧指数达到32;流体力学性能研究表明乳液体系为非牛顿假塑性流体弹性体系。阻燃性能研究表明Al(OH)3改性后丙烯酸酯乳液胶黏剂的热释放速率和烟释放量大大降低,CO生成量降低50%以上,引燃时间由60 s延长至77 s,热释放速率峰值由528 k W/m2降为165 k W/m2,燃烧速率为明显减缓(80 s至110 s),质量损失速率明显降低,有较好的阻燃性。展开更多
文摘Various Cu/ZnO/Al2O3 catalysts have been synthesized by different aluminum emulsions as aluminum sources and their pertormances tor methanol synthesis from syngas have been investigated. The influences of preparation methods of aluminum emulsions on physicochemical and catalytic properties of catalysts were studied by XRD, SEM, XPS,N2 adsorption-desorption techniques and methanol synthesis from syngas. The preparation methods of aluminum emulsions were found to influence the catalytic activity, CuO crystallite size, surface area and Cu0 surface area and reduction process. The results show that the catalyst CN using the aluminum source prepared by addition the ammonia into the aluminum nitrate （NP） exhibited the best catalytic performance for methanol synthesis from syngas.
文摘采用机械共混方式获得Al(OH)3改性丙烯酸酯乳液胶黏剂,研究了分散剂种类及用量、增稠剂用量和Al(OH)3用量对胶黏剂基本性能和流体力学性能的影响。结果表明,在分散剂六偏磷酸钠(SHMP)用量为0.35%、增稠剂羟乙基纤维素(HEC)用量为0.20%和阻燃剂Al(OH)3用量为30%时,改性后丙烯酸酯乳液胶黏剂的性能较好,黏度为1 360 m Pa·s,p H值为5.45,贮存30天后稳定性较好,氧指数达到32;流体力学性能研究表明乳液体系为非牛顿假塑性流体弹性体系。阻燃性能研究表明Al(OH)3改性后丙烯酸酯乳液胶黏剂的热释放速率和烟释放量大大降低,CO生成量降低50%以上,引燃时间由60 s延长至77 s,热释放速率峰值由528 k W/m2降为165 k W/m2,燃烧速率为明显减缓(80 s至110 s),质量损失速率明显降低,有较好的阻燃性。
