Making energy from CO2
-Convert greenhouse gas to future energyGroup 6:
Pongpaisanseree Kittisak, Maruyama Takahiro, Harish Reza Septiano, Dong Lei, Gautam Deepak, Kim
Min Seok, Yang Yuanru(TA)
Because of the affordable price, light weight, strong and ductility of the steel, it has been
incredibly popular for its use in different fields like construction, industry, automobile etc. that lead
to the rapid growth of the steel industries. But, during its process, beside steel, steel production
also emit a not negligible amount of by product that should have more attention, because it may
affect the sustainability of steel process and harm the environment, in short or long term.
Different stages in the steel production are contributing to different byproducts. It is found that
the biggest amount of by-products emitted is CO2, which emitted from every combustion step,
and Slag which mainly produced from the steel melting shop and the blast furnace. To minimize
the negative effect of these by products, efforts to utilize them has been conducted. Heat energy
of each by by products has already recycled to improve the energy efficacy. Slags produced from
the steel melting shop and blast furnace has also been utilized as the limestone substitute and
the mixing material for concrete. However, the emitted CO2 still has only a very few way to be
abated or utilized.
There are some technologies and techniques has already developed to reduce the CO2 emission
by capturing and storing them by sending them back to below the earth surface, but the problem
is, all of them always shows tradeoff between energy and emission. Here, new technology which
uses the byproduct gases like Co2 to produce the energy which further can be utilized in the
industry is proposed. There are mainly three technologies are investigated and considered to be
incorporated in our model.
① Creation of methanol by series of reactions (involving CO2reduction by hydrogen), catalytic reaction
② Use products made by the principles of photosynthesis
③ Electric power generation method by direct use of CO2
(not well organized)
The main focus will be on the efficient capture of the byproduct gases which otherwise would be
released in the atmosphere. Its purification and ultimately its use to generate the energy. The
energy so generated would reduce the dependency on fossil fuels and natural gases for the
energy in steel industry to some extent. Therefore this technology can achieve both energy
efficiency and reduction of unwanted gases at the cost of added recycling block in the steel
industry. Use of this kind of technology in the steel production is desirable for the environment.