Patent analysis of biological hydrogen production

Through the international authoritative Deventer World Patent Innovation Index Database (DII) 1996 ~ 2006, * * retrieved 673 patent documents on biohydrogen production; Using TDA software analysis, in the field of bio-hydrogen production technology, the top 10 patentees are all Japanese research institutions or enterprises. The patentee with the largest number of patents is Japan's independent administrative legal person industrial technology, and its patents are mainly in the technical fields of hydrogen production or synthesis gas by anaerobic fermentation of organic matter, hydrogen production by thermal decomposition of biomass, hydrogen production by supercritical conversion of biomass and so on. From 2000 to 2002, patents mainly focused on the mechanism of fermentation process and the preparation of fermentation raw materials. From 2002 to 2004, patents mainly focused on the fermentation of organic wastes and the selection of catalysts. Since 2004, the technology involved in its patent application has become increasingly diversified, and patents in the fields of hydrogen production from biomass pyrolysis and hydrogen production from biomass supercritical conversion have emerged continuously.