Sulfate removal effect of molasses alcohol wastewater pretreated by physical and chemical methods and its biogas production performance

Molasses alcohol wastewater normarlly contains high quantity of SO4 which can restrain the production of the biogas. In this paper, we used the activated carbon, Ba Cl2·2H2O, Ca（OH）2 and iron carbon micro cell to pretreat the molasses alcohol wastew

Electrocatalytic Oxidation of Formic Acid on Pd/Ni Heterostructured Catalyst

通过两步还原法制备了Pd/Ni双金属催化剂.由于金属Pd原子在先行还原的Ni纳米粒子表面的外延生长以及其在Ni表面及Pd表面生长表现出的吉布斯自由能差异，最终导致了异结构Pd/Ni纳米粒子的形成.高分辨电子透射显微镜结果证实了异结构的存在，然而X射线衍射测量表明Pd/Ni纳米粒子具有类似于Pd的面心立方结构.制备的Pd/Ni纳米粒子与同等条件下合成的Pd纳米粒子相比对甲酸氧化呈现了更高的电催化活性，而且电催化稳定性也要明显优于纯Pd纳米粒子，证明Pd/Ni双金属催化剂是可选的直接甲酸燃料电池阳极催化剂.双金属催化剂对甲酸氧化电催化活性和稳定性增强可能是Ni原子的修饰改变了Pd粒子表面配位不饱和原子的电子结构所致.A Pd/Ni bimetallic nanostructured electrocatalyst was fabricated via a two-step reduction route. Owing to an epitaxial growth of Pd atoms on the surface of Ni nanoparticles, heterostructured Pd/Ni nanocomposites were formed and verified by high resolution transmission electron microscopy combined with energy-dispersion X-ray spectroscopy. X-ray diffraction confirmed that the as-prepared Pd/Ni nanocomposites possessed a single face-centered-cubic (fcc) Pd structure, probably due to a weaker diffraction intensity of metallic Ni and/or overlapping by that of Pd. The intrinsic catalytic activity on the Pd/Ni is higher than that on the Pd. Moreover, the durability of formic acid oxidation on the Pd/Ni was much enhanced over the Pd nanoparticles. The change in electronic structure of the surface coordination unsaturated Pd atoms and the possible dissolution of Ni species from the Pd/Ni heterostructure may account for such an improved durability for formic acid oxidation.This work was supported by the National Basic Research Program of China (973 Program) (No. 2012CB932800), the Natural Science Foundation of China (No. 21073219), Shanghai Science and Technology Committee (No. 11DZ1200400) and the Knowledge Innovation Engineering of the CAS (No. 12406, 124091231).This work was supported by the National Basic Research Program of China (973 Program) (No. 2012CB932800), the Natural Science Foundation of China (No. 21073219), Shanghai Science and Technology Committee (No. 11DZ1200400) and the Knowledge Innovation Engineering of the CAS (No. 12406, 124091231).作者联系地址：1. 中国科学院上海高等研究院，上海 201210；2. 中国科学院研究生院，北京 100039Author's Address: 1. Shanghai Advanced Research Institute, Chinese Academy of Sciences CAS, Shanghai 201210, China; 2. Graduate School of the CAS, Beijing 100039, China通讯作者E-mail：[email protected] & [email protected]

Research on performance parameters of phase change material objects for building

根据相变材料的特性及在建筑工程中的应用要求,提出了建筑用复合相变材料的热工性能、机械性能及安全性能参数及指标要求

唐古拉——中国高原动物的最后堡垒

1986年10月22日至11月10日由林业部组织的一支精悍的联合考察队对位于青海和西藏交界处的唐古拉山地区的野生动物进行了为期20天的调查,一同前往考察的还有美国纽约动物学会的兽类专家乔治·夏勒博士。唐古拉山地区地处青海省的西南部,行政上属海西蒙古族、藏族,哈萨克族自治州管辖,海拔4000—5000米左右,著名的青藏公路

相变材料应用于建筑外墙的温度与能耗模拟

使用EnergyPlus能耗模拟软件对相变材料作为外墙表面隔热材料的应用效果进行模拟,在小空间和小型办公室的模型上,改变相变材料的相变温度、材料结构和用量等使用条件,并进一步考虑室内热源和不同气候区的影响,对比分析在空调季节里空间内部温度的变化情况和空调节能效果。模拟结果表明：相变温度稍高的相变材料更有利于夜间散热蓄冷,同时,结合双层复合结构可获得更好的温度抑制和节能效果；内热源的存在会提高房间空调能耗的基数,从而使相变材料空调节能率计算值降低,并且在一定程度上掩盖了相变材料对室内平均温度的抑制作用,尽管如此,相变材料在有内热源环境下使用时空调节能量仍与无内热源时相当

乏食压力下幼龄麋鹿的行为

2011年12月～2012年3月,采用样线法对大丰麋鹿保护区幼龄麋鹿的集群组成、生境选择和警戒距离等进行调查,采用目标动物取样法对其行为进行观察,分析处于乏食状态下幼龄麋鹿的行为活动规律。结果显示:幼龄麋鹿昼间77.45%的时间用于取食活动,它们通过延长取食时间以取得足够食物,维持生理需要。乏食压力下,幼龄麋鹿集群、生境选择及观望警戒距离月间差异均不显著（P>0.05）,生活规律保持相对稳定性。乏食期结束,74.58%的幼龄麋鹿能够应对自然环境变化得以生存,显示了其具有一定野外生存本能和较高的环境变化适应能力

Octavofest Coffee and Comics!

Octavofest celebrates the Book and Paper Arts - with Comics and Coffee! Comics professionals will host workshops for participants of all skill levels. Enjoy free Rising Star coffee while creating your own personal comics or refining your sequential art skills

Research Progress on Mechanism and Treatment of Sulfate on the Anaerobic Degradation of Molasses Alcohol Wastewater

High concentration of sulfate is an important factor affecting the degradation of molasses alcohol wastewater. This paper described the sulfate-reducing bacteria effect of anaerobic fermentation process and sulfate reduction products of the anaerobic met

一种以棕榈油为原料的相变材料的制备方法

以棕榈油为原料经酯交换反应制得饱和脂肪酸甲酯,再与十六醇按质量比10∶1制成复合相变材料,其熔点Tm26.9℃,相变潜热212.5 J/g。该材料应用到建筑围护结构中,适用于南方地区,利用围护结构吸收和储存白天进入室内的太阳辐射热,夜间时释放能量,减少室内温度波动,提高室内热舒适性,降低采暖或制冷能耗,降低建筑能耗