scholarly journals Effect of Carbonaceous Reducers on Carbon Emission during Silicon Production in SAF of 8.5 MVA and 12.5 MVA

Silicon ◽  
2021 ◽  
Author(s):  
Kaizhi Jiang ◽  
Zhengjie Chen ◽  
Wenhui Ma ◽  
Shijie Cao ◽  
Hongmei Zhang ◽  
...  
2021 ◽  
Author(s):  
Kaizhi Jiang ◽  
Zhengjie Chen ◽  
Wenhui Ma ◽  
Shijie Cao ◽  
Hongmei Zhang ◽  
...  

Abstract The silicon manufacturing process produces a large amount of carbon emissions, which is of deep concern to the Chinese government. Previous research has calculated the amount of carbon emissions incurred in silicon production, while research on the factors that affect carbon emissions during the silicon production process has been scarce. The effect of the carbonaceous reducers' consumption on the carbon emission during silicon production was investigated using statistical analysis of the actual production data in order to lower the carbon emissions of silicon production. The effect of different type furnaces (8.5MVA and 12.5MVA) on the carbon emission were also investigated in the study. Based on the results, the soft coal has the greatest impact on carbon emissions when using the 8.5MVA submerged arc furnace. When using the 12.5MVA furnace, petroleum coke has the greatest impact on carbon emission. The use of the 12.5MVA furnace reduces the carbon dioxide emissions of the production of one ton of silicon by approximately 74 kg compared to the 8.5MVA furnace. To obtained reduced carbon emissions in silicon production, we suggest that the silicon manufacturers should (1) use the 12.5MVA submerged arc furnace as much as possible; (2) and optimize the ratio of carbonaceous reducing agents in raw materials for the different furnace types.


2020 ◽  
Vol 7 (1) ◽  
pp. 99
Author(s):  
Yong Adilah Shamsul Harumain ◽  
Nur Farhana Azmi ◽  
Suhaini Yusoff

Transit stations are generally well known as nodes of spaces where percentage of people walking are relatively high. The issue is do more planning is actually given to create walkability. Creating walking led transit stations involves planning of walking distance, providing facilities like pathways, toilets, seating and lighting. On the other hand, creating walking led transit station for women uncover a new epitome. Walking becomes one of the most important forms of mobility for women in developing countries nowadays. Encouraging women to use public transportation is not just about another effort to promote the use of public transportation but also another great endeavour to reduce numbers of traffic on the road. This also means, creating an effort to control accidents rate, reducing carbon emission, improving health and eventually, developing the quality of life. Hence, in this paper, we sought first to find out the factors that motivate women to walk at transit stations in Malaysia. A questionnaire survey with 562 female user of Light Railway Transit (LRT) was conducted at LRT stations along Kelana Jaya Line. Both built and non-built environment characteristics, particularly distance, safety and facilities were found as factors that are consistently associated with women walkability. With these findings, the paper highlights the criteria  which are needed to create and make betterment of transit stations not just for women but also for walkability in general.


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