The 68th Hiroshima University Biomass Evening Seminar (The 41st Hiroshima University ACE Seminar)

Date & Time: Thu .25  Oct., 2018   16:20-17:50

Place: Engineering 110 Lecture Room, Higashi-Hiroshima Campus, Hiroshima University 


Commentary: Yukihiko MATSUMURA
 Professor, Graduate School of Engineering, Hiroshima University 

Lecture: Apip AMRULLAH
D3 Student, Graduate School of Engineering, Hiroshima University
Gasification Characteristics of Sewage Sludge under Subcritical Water Conditions
The gasification sewage sludge in sub-critical water was investigated in a continuous flow reactor. A continuous reactor was employed and experiments were conducted by varying the temperature 300 and 350 °C and residence time 5-30 s with the fix pressure of 25 MPa. The effect of temperature and time on the composition of the product gas were investigated. The gaseous products were analyzed by using a gas chromatograph (GC) equipped with a thermal conductivity detector (TCD) and a flame ionization detector (FID). H2 was detected by GC-TCD with N2 as the carrier gas; CO2 and CO were detected by GC-TCD with He as the carrier gas, and CH4, C2H4, and C2H6 were detected by GC-FID with He as the carrier gas. The results shown the gaseous product mainly contained H2 and CO2 with less amount of CH4 and C2H4, no CO was found. Temperature has not effected on carbon gas efficiency. 

Lecture: Toshiaki Hanaoka
 Senior Research Scientist, Research Institute for Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology(AIST)
Simulation and estimation of 1,3-butadiene production process from lignin via syngas
Three processes for the production of 1,3-butadiene (1,3-BD) from lignin via syngas were proposed and the 1,3-BD yields and power and heat loads were estimated through process simulation. These processes consisted of lignin gasification, conversion of syngas to light olefins (LOs) via (1) dimethyl ether (DME), (2) methanol, or (3) direct synthesis, and isomerization/dehydrogenation of n-C4H8. The process capacity was 200 t/d on a wet lignin basis. The electric power was largely dependent on the process (47776073 kW) while the minimum external heat was 97 kW according to pinch analysis. When each reaction proceeded ideally, the process via DME was the most promising.  

Chair: Yukihiko MATSUMURA
  Professor, Graduate School of Engineering, Hiroshima University