New process for producing methanol from coke oven gas by means of CO2 reforming. Comparison with conventional process

Abstract

A novel method of producing methanol from coke oven gas (COG), involving the CO 2 reforming of COG to obtain an appropriate syngas for the synthesis of methanol is proposed. This method is compared with a conventional process of methanol synthesis from natural gas, in terms of energy consumption, CO 2 emissions, raw materials exploitation and methanol purity. Whereas this new process requires the consumption of less energy, the conventional process allows a higher energy recovery. CO 2 emissions are considerably lower with the new process, but the geographic situation of the plant plays a determinant role. From the point of view of raw materials exploitation and methanol purity, the process proposed yields better results. These results suggest that methanol production from coke oven gas would be a more attractive alternative to conventional processes.

Carbon cycle in advanced coal chemical engineering

“…Yang et al 302 proposed a coal-to-olefins system that recycled CO 2 into both the gasifier and the dry reforming unit, considering effects of the CO 2 recycling distribution between the two paths on system performance. [310][311][312][313][314][315] In summary, CO 2 recycle coupled with CH 4 -rich gas in coal chemical engineering is a good option for dealing with deficiencies such as low efficiency and high investment cost typically associated with CO 2 control and reduction. Kok Siew Ng et al 309 modified a conventional coal IGCC with CCS system into a polygeneration system wherein CO 2 from the fuel gas of the gas turbine is reused into syngas generation through tri-reforming.…”

Methanol Synthesis from Industrial CO2 Sources: A Contribution to Chemical Energy Conversion

“…The main components of blast furnace and converter gases are carbon dioxide, carbon monoxide and nitrogen. Coke oven gas mostly contains hydrogen and methane [8]. After gas conditioning including purification the exhaust gases can act as a possible feed gas for the methanol synthesis.…”

A Review of Mathematical Programming in Integrated Iron‐ and Steelmaking

“…Research from Bermúdez et al indicates it is possible to produce methanol from COG and a preferable production route compared to other valorization paths for COG . However, synthesis gas conditioning is not trivial in this case.…”