To provide a method and an apparatus for stabilizing a gas hydrate which can stabilize the gas hydrate without an increased rate of ice and also can suppress it from dissociating even at a possibly highest temperature below ice point without an increased rate of ice.
The stabilized gas hydrate comprises being covered with an ice shell containing solid fine particles around it. The method comprises a gas hydrate producing process, a separating and dewatering process, a freezing process and a solid fine particle supplying process, wherein the gas hydrate producing process reacts a water raw material and a gas raw material to produce a gas hydrate; the separating and dewatering process separates the produced gas hydrate from the water raw material and the unreacted gas raw material; the freezing process freezes the water around the separated and dewatered gas hydrate; and the solid fine particle supplying process supplies solid fine particles in a water raw material at a stage prior to the separating and dewatering process.
IDA HIROYUKI
EBINUMA TAKAO
UCHIDA TSUTOMU
NAGAO JIRO
TAKEYA SATOSHI
NARITA HIDEO
NAT INST OF ADV IND & TECHNOL