The Design of Supercritical Liquid Pipe for Organic Material Treatment

The supercritical liquid discovered in 1821, the specific character was known for many years. However, it began to be used industrially in Japan after the oil shock of the second half of the 1970s. Development of the process which extracts the high ingredient of added value focusing on fields, such as food and medical supplies, using the super-criticality CO₂ was furthered at first in Germany. The supercritical water attracts attention with a rise of the concern of the latest resources problem or an environmental problem. Moreover, the process development such as recycling, decomposition of dioxin and PCB and oilizing and monomerizing of a waste plastic have been active. In recent years, use of the woody biomass is briskly performed on Europe. Since there is the woody biomass abundantly, it tends to go into a hand. In this paper, the supercritical liquid is described briefly. Next, the experiment of supercritical treatment of wood is described. And finally, we proposed using the explosive welding technique for the development of pressure vessel and performed the numerical simulation.