Specific surface area

Table 3 shows the BET surface area of both the fresh and hydrothermally aged SCR catalysts. For fresh BEA zeolite and SCR catalysts, as the doping amount of catalytic additive increases, the BET surface area decreases, probably because the additive Cu, Ce, and Nb species blocked some of the zeolite channel, hindering the entry of N2 into the pores (Bin et al. 2014). After aging at 600 °C, all the samples showed 3-20 m2/g increased BET surface area. Aging condition of 600 °C is a relatively mild…

Heat will be moved from the hot smoke to the descending cold air and from smoke to the atrium walls. Then if the cross sectional area of the atrium is small and the HRR of fire is high enough, smoke column will be created and flooding flow will occur in the atrium, too. In other hand, if the cross sectional area of the atrium is high and the HRR of fire is small, smoke column will not create in the atrium and floding flow will not occur to vent smoke. Figure ‎2.8 Flow…

CONCLUSION An experiment was run to determine how a cell’s surface area to volume ratio affects its rate of diffusion. The proposed hypothesis was if a big surface area to volume ratio is something very desired by cells that need efficient and fast diffusion for their functioning (Oxygen, water, and waste), then the cube with the largest Surface area will have the most molecules diffused into the agar cube because the more surface area a cube have, the more molecules the agar cube is getting…

Problem Statement Industries are generated waste water, which contain dyes and pigments in waste water. Characteristically high in colour and organic content (Grag, et al., 2004). Dyes are widely used in industries such as textile, rubber, paper, plastic, and cosmetic. There are many of dyes exist in industries and one of them is methyl red and through nano zerovalent iron removal of dyes from waste water. Dye industry effluents constitute one of the most problematic wastewaters to be treated…

therefore this article provides an example of Deep Web activism outside North America, as well as its consequences (deaths, injuries). However, instead of having clear negative ethical consequences, this benefits my argument because it shows positive areas of Deep Web activism, in which a public sphere of Arab people began a public sphere to identify issues of repression. Sparks, Colin. “The Internet and the Global Public Sphere in Mediated Politics: Communication in the Future of…

Soil erosion is one of the most serious threats in our world. Humans cause 40% of soil erosion. Soil erosion is topsoil, which is organic soil made up with rich nutrients. Erosion can be caused by careless farming techniques that lead to water erosion. When it is raining and you are walking to class you can see soil erosion where they have been working beside the English building. Soil erosion and water erosion is practically the same thing. No one will ever notice soil erosion because nobody…

biodiversity in the air. There is a strong likelihood that by adopting some beneficial policies by government, biodiversity issues will slightly improve until these challenges are totally eradicated. For future research in this area I propose a Life Cycle Cost Analysis (LCCA) in all areas mentioned as well as a case study about the effects of loss of biodiversity in American native…

Dark Web entails, there are also some fascinating facts about it. For example, did you know that it has been reported that the Deep Web itself “is approximately 400 to 550 times larger than the surface web, and also contains 7,500 terabytes of information compared to the 19 terabytes of info in the surface web? Also, the…

resistance to the Mining Induced Displacement and Resettlement (MIDR) process in the Phulbari Coal Mining project in Bangladesh, and will demonstrate the necessity to identify various intrinsic politics of land among land owners and landless in the mining areas that creates different levels of vulnerabilities to the project Affected Peoples (APs) and their response to the MIDR process of in the developing countries. The study…

If we change the material the water goes through, how will it affect the quality of the water after it passes? To make the water quality better, an experiment can be done to see if a certain material can be placed in runoff areas. The independent variable would be the different material; rock, sand, and soil. The dependent variable would be the water quality. To test the water quality, test the pH level, the amount of dissolved oxygen, and the level of nitrogen and phosphorus…