Envionmental Impacts of Mesoporous Silver-Supported Cobalt Oxide Catalyst Based on Life Cycle Assessment
Xueying Li,
Bingyang Bai,
Yupeng Fan,
Minghui Xie,
Qi Qiao
Issue:
Volume 6, Issue 4, July 2018
Pages:
71-77
Received:
6 September 2018
Accepted:
28 September 2018
Published:
27 October 2018
Abstract: Life cycle assessment can be used to evaluate the environmental issues involved in the entire product production process (including raw material acquisition, production, transportation, use/maintenance and final disposal). It is an important support tool for screening and developing an efficient, low-cost and environmentally friendly product. In this study, based on the life cycle method, an environmental impact assessment of the resource consumption and pollutant emission data was carried out for the mesoporous K-Ag/Co3O4 catalyst life cycle. The results show that the proportion of resource consumption to produce 1 kg of mesoporous K-Ag/Co3O4 is 0.132. Environmental impact types mainly contain fossil depletion, climate change, human health and particulate matter formation; The substances produced by mesoporous K-Ag/Co3O4 catalyst life cycle have the greatest impact on human health, including carcinogens, resp. inorganics and human toxicity. These substances are mainly gas pollutants, CO2 emission is the largest, followed by SO2 and CH4. Whether it is health impact, environmental impact or resource depletion, electricity consumption is the main factor. Thus, it is necessary to improve the production process and use low-power equipment to reduce the environmental impact of the entire life cycle. The use of mesoporous K-Ag/Co3O4 catalyst has purified a large amount of formaldehyde and has a good environmental effect.
Abstract: Life cycle assessment can be used to evaluate the environmental issues involved in the entire product production process (including raw material acquisition, production, transportation, use/maintenance and final disposal). It is an important support tool for screening and developing an efficient, low-cost and environmentally friendly product. In th...
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Numerical Analysis of Effect of Bridge on Inundation Flow in the Kagetsu River on July 2017
Xiang Chen,
Ryuichi Hirakawa,
Terunori Ohmoto
Issue:
Volume 6, Issue 4, July 2018
Pages:
78-84
Received:
5 December 2018
Published:
17 December 2018
Abstract: The flood behavior often affected by bridges, due to the accumulation of debris around bridge piers or the reduction of flow late. On the other hand, the effect of a bridge on a flood was not well studied. In this research, the simulation of the flood in the Kagetsu River in July, 2017 was conducted using 2D flow model in order to evaluate the effect of a bridge on the flood capacity, water level and flood scale. The flood behavior in residential area was also simulated. As a result, the bridge increased inundation velocity and inundation area, especially in the area around the bridge. When water level exceeds the height of bridge, flow discharge was limited by the area of bridge opening, which caused flow capacity decreasing. The stream force of flood was relatively strong at the area around the bridge.
Abstract: The flood behavior often affected by bridges, due to the accumulation of debris around bridge piers or the reduction of flow late. On the other hand, the effect of a bridge on a flood was not well studied. In this research, the simulation of the flood in the Kagetsu River in July, 2017 was conducted using 2D flow model in order to evaluate the effe...
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