采用浸渍法制备铜金属氧化物改性活性炭吸附剂,采用同步热重差热分析（TG/DTA）、比表面分析（N2-BET）和X线光电子能谱（XPS）分析,考察吸附剂的净化性能。研究结果表明：最佳焙烧温度为300℃,最优体积空速为600 h 1;铜金属氧化物改性...采用浸渍法制备铜金属氧化物改性活性炭吸附剂,采用同步热重差热分析（TG/DTA）、比表面分析（N2-BET）和X线光电子能谱（XPS）分析,考察吸附剂的净化性能。研究结果表明：最佳焙烧温度为300℃,最优体积空速为600 h 1;铜金属氧化物改性能显著增加活性炭对HCN的吸附性能,孔径为0.74~1.98 nm的微孔对HCN的吸附贡献较大,改性活性炭在325℃以内保持较优的热稳定性,CuO是吸附剂的主要活性组分,吸附HCN后,HCN被催化氧化分解为NH3,吸附剂的失活可能是HCN在脱除过程中生成的CuCN填充和覆盖了活性炭的微孔。展开更多
Partial oxidation gasification in supercritical water could produce fuel gases(such as H2, CO and CH4) and significantly reduce the energy consumption. In this work, an energetic model was developed to analyze the par...Partial oxidation gasification in supercritical water could produce fuel gases(such as H2, CO and CH4) and significantly reduce the energy consumption. In this work, an energetic model was developed to analyze the partial oxidative gasification of biomass(glucose and lignin) in supercritical water and the related key factors on which gasification under autothermal condition depended upon. The results indicated that the oxidant equivalent ratio(ER) should be over 0.3 as the concern about energy balance but less than 0.6 as the concern about fuel gas production. Feedstocks such as glucose and lignin also had different energy recovery efficiency. For materials which can be efficiently gasified, the partial oxidation might be a way for energy based on the combustion of fuel gases. Aromatic materials such as lignin and coal are more potential since partial oxidation could produce similar amount of fuel gases as direct gasification and offer additional energy. Energy recovered pays a key role to achieve an autothermal process. Keeping heat exchanger efficiency above 80% and heat transfer coefficient below15 k J·s-1is necessary to maintain the autothermal status. The results also indicated that the biomass loading should be above 15% but under 20% for an autothermal gasification, since the increase of biomass loading could improve the energy supplied but decrease the efficiency of gasification and gaseous yields. In general,some specific conditions exist among different materials.展开更多
文摘采用浸渍法制备铜金属氧化物改性活性炭吸附剂,采用同步热重差热分析（TG/DTA）、比表面分析（N2-BET）和X线光电子能谱（XPS）分析,考察吸附剂的净化性能。研究结果表明：最佳焙烧温度为300℃,最优体积空速为600 h 1;铜金属氧化物改性能显著增加活性炭对HCN的吸附性能,孔径为0.74~1.98 nm的微孔对HCN的吸附贡献较大,改性活性炭在325℃以内保持较优的热稳定性,CuO是吸附剂的主要活性组分,吸附HCN后,HCN被催化氧化分解为NH3,吸附剂的失活可能是HCN在脱除过程中生成的CuCN填充和覆盖了活性炭的微孔。
基金Supported by the National Natural Science Foundation of China(21037001,21076091,21307049)the National Key Project for Basic Research of China(2008BAC32B06-1)+2 种基金Yunnan Province High-tech Talent Introduction Project(2010CI110)the Important Yunnan Province's Science&Technology Specific Project(2012ZB002)the Yunnan Science Foundation(2013FZ032,14118583)
文摘Partial oxidation gasification in supercritical water could produce fuel gases(such as H2, CO and CH4) and significantly reduce the energy consumption. In this work, an energetic model was developed to analyze the partial oxidative gasification of biomass(glucose and lignin) in supercritical water and the related key factors on which gasification under autothermal condition depended upon. The results indicated that the oxidant equivalent ratio(ER) should be over 0.3 as the concern about energy balance but less than 0.6 as the concern about fuel gas production. Feedstocks such as glucose and lignin also had different energy recovery efficiency. For materials which can be efficiently gasified, the partial oxidation might be a way for energy based on the combustion of fuel gases. Aromatic materials such as lignin and coal are more potential since partial oxidation could produce similar amount of fuel gases as direct gasification and offer additional energy. Energy recovered pays a key role to achieve an autothermal process. Keeping heat exchanger efficiency above 80% and heat transfer coefficient below15 k J·s-1is necessary to maintain the autothermal status. The results also indicated that the biomass loading should be above 15% but under 20% for an autothermal gasification, since the increase of biomass loading could improve the energy supplied but decrease the efficiency of gasification and gaseous yields. In general,some specific conditions exist among different materials.
