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by microorganism; (2) the desorption of Ge compounds from the lignite. The recovery rate of Ge has been enhanced by 14% since the discovery of adsorption and desorption of Ge from coal. The effects of pH, leaching agents, and coal size on the recovery of Ge were experimentally investigated, and the optimized process parameters were obtained. The reaction heat of Ge adsorption and desorption in lignite......
100083, China摘 要:<正> The function of disproportionation and desorption stages of hydrogenation-disproportionation-desorption-recombination (HDDR... disproportionation time, combined with a high desorption temperature and slow desorption rate, during HDDR process is beneficial to anisotropy attainment, but HDDR Nd13Fe80B7 magnetic powder becomes......
of model sorbents derived from temperature programmed desorption (TPD) approach reaches 1.72 mmol·g-1 that is much higher than the sum of adsorption capacity of bare mesoporous silica and free polymers... desorption measurement.It is also observed that physical adsorption is completely reversible and chemical adsorption is irreversible.The results demonstrate that the temperature programmed desorption......
">The isothermal desorption kinetics of the 1.1Mg H2-2Li NH2-0.1Li BH4 system were improved by addition of La Ni4.5Mn0.5alloy. The hydrogen desorption peak temperature of the sample containing La Ni4.5Mn0.5 reduced by approximately 5 K and the activation energy reduced by 9%. The results of isothermal dehydrogenation kinetics analysis implied that the isothermal desorption process at initial stage......
and Engineering摘 要:The breakthrough curves of benzene and water on modified activated carbons(ACs) were investigated.Temperature-programmed desorption(TPD) experiments were conducted to measure the TPD curves of benzene and water on modified and unmodified ACs and to estimate the activation energy for the desorption of benzene on the modified......
technology. The effects of Ni content and milling time on the gaseous hydrogen storage thermodynamics and dynamics of the alloys were systematically investigated. The hydrogen desorption properties were studied by Sievert’s apparatus and a differential scanning calorimeter (DSC) connected with a H2 detector. The thermodynamic parameters (△H and △S) for the hydrogen absorption and desorption......
椰壳类活性炭孔隙结构对苯并噻吩脱附活化能的影响 李忠1,王书文1,余谟鑫1,奚红霞1,夏启斌1 (1.华南理工大学,化工与能源学院,传热强化与过程节能教育部重点实验室,广东,广州,510640) 摘要:主要研究活性炭孔隙结构对苯并噻吩脱附活化能及吸附性能的影响.使用ASAP 2010测定了3种椰壳制活性炭SY-6,SY-13和SY-19的BET比表面及其孔隙结构,采用程序升温脱附技术(TPD)测定了苯并噻吩在3种活性炭上的脱附活化能,用静态吸附法进行了苯并噻吩在不同活性炭上的吸附等温线,并讨论了活性炭孔隙结构对苯并噻吩脱附活化能及吸附性能的影响.结果表明,3种活性炭SY-6,SY-13和......
纳米晶镁粉的吸放氢动力学模型分析 李谦1,刘静1,林根文1,周国治1 (1.上海大学材料科学与工程学院,上海,200072;2.北京科技大学冶金与生态工程学院,北京,100083) 摘要:利用一种新模型分析了纳米晶镁粉的吸放氢动力学,量化了球磨和添加剂Pd对镁粉吸放氢动力学性能的改善效果.结果表明,球磨能大幅度降低氢化反应活化能,提高镁粉的氢化速率30倍.添加1%(质量分数)Pd的纳米镁粉(30 nm)的吸放氢速率比未添加Pd的纳米镁粉(30 nm)的吸氢速率提高6.6倍.模型计算出30 nm Mg-1%Pd(质量分数)合金的吸氢活化能为38.74 kJ/molH2. 关键词:储氢合金......
镁基储氢材料颗粒尺寸对吸放氢动力学性能的影响 于振兴1,王尔德2,房文斌2,张文丛2 (1.清华大学,北京,100084;2.哈尔滨工业大学复合材料研究所,黑龙江,哈尔滨,150001) 摘要:通过吸放氢动力学方程,计算了颗粒大小对镁-镍-氧化物储氢材料吸放氢动力学过程的影响.计算结果表明:不同颗粒直径的镁-镍-氧化物储氢材料的吸放氢反应速度差别较大;颗粒越小,其吸放氢动力学性能越优异. 关键词:储氢材料; 颗粒尺寸; 吸放氢动力学; [全文内容正在添加中] ......
and desorption thermodynamics and kinetics properties of Mg-Ni-based alloys, partially substituting Y and Cu for Mg and Ni respectively and melt spinning technique were applied for getting Mg25-xYxNi9 Cu(χ... applied for calculation. It is found that their hydriding kinetics notably declines, however, their hydrogen desorption kinetics conspicuously improves, with spinning rate and Y content increasing......
