Abstract: A method for producing hydrogen wherein use is made of a high temperature steam electrolysis apparatus having an electrolysis vessel being partitioned into the anode side and the cathode side by the use of a solid oxide electrolyte film as a diaphragm, steam is fed to the above cathode side and a reducing gas is fed to the anode side, and steam electrolysis is carried out at a high temperature, characterized in that the reducing gas and the steam fed to the electrolysis vessel has a temperature of 200 to 500° C.

Abstract: The present invention relates to a Ni base alloy having sufficient strength at high temperatures and high corrosion resistance at high temperatures in a high-temperature composite corrosive environment in which chlorination or sulfidation occurs simultaneously with high-temperature oxidation, without excessive cooling or surface protection. According to the present invention, a Ni base alloy having high-temperature strength and corrosion resistance includes Cr in a range of from 25 to 40 weight %, Al in a range of from 1.5 to 2.5 weight %, C in a range of from 0.1 to 0.5 weight %, W of 15 weight % or less, Mn of 2.0 weight % or less, Si in a range of from 0.3 to 6 weight %, Fe of 5% or less, and Ni of rest except inevitable impurities. When strength at high temperatures is allowed to be small, W is in a range of from 0 to 8%, and Si is in a range of from 0.3 to 1% or from 1 to 6%. In order to enhance strength at high temperatures, W is in a range of from 8 to 15, and Si is in a range of from 0.

Abstract: The liquid fuel synthesis system according to the present invention includes a gas purifying apparatus (102) for adjusting components of a synthesis gas containing hydrogen and carbon monoxide or a synthesis gas containing hydrogen, carbon monoxide and carbon dioxide to produce a purified gas, and a liquid fuel synthesis apparatus (300) for synthesizing a liquid fuel (309) using, as a raw material, the purified gas (301a) produced in the gas purifying apparatus. The gas purifying apparatus includes a hydrogen separating apparatus (120) and a bypass line (406) which bypasses the hydrogen separating apparatus. A part of the synthesis gas is passed through the hydrogen separating apparatus to produce high-purity hydrogen (j), and the produced high-purity hydrogen (j) is mixed with the synthesis gas which has passed through the bypass line to adjust the ratio of hydrogen to carbon monoxide in the purified gas or the ratio between hydrogen, carbon monoxide and carbon dioxide in the purified gas.

Abstract: The present invention relates to a Ni base alloy having sufficient strength at high temperatures and high corrosion resistance at high temperatures in a high-temperature composite corrosive environment in which chlorination or sulfidation occurs simultaneously with high-temperature oxidation, without excessive cooling or surface protection. According to the present invention, a Ni base alloy having high-temperature strength and corrosion resistance includes Cr in a range of from 25 to 40 weight %, Al in a range of from 1.5 to 2.5 weight %, C in a range of from 0.1 to 0.5 weight %, W of 15 weight % or less, Mn of 2.0 weight % or less, Si in a range of from 0.3 to 6 weight %, Fe of 5 % or less, and Ni of rest except inevitable impurities. When strength at high temperatures is allowed to be small, W is in a range of from 0 to 8 %, and Si is in a range of from 0.3 to 1 % or from 1 to 6 %. In order to enhance strength at high temperatures, W is in a range of from 8 to 15, and Si is in a range of from 0.

Abstract: The present invention relates to a waste carbonization method which produces charcoal and/or activated carbon from solid wastes, such as wood waste, and renders produced gas completely harmless. Solid wastes B are exposed to gas generated in pyrolysis gasification of other wastes A in a gasification furnace 1 to produce charcoal and/or activated carbon from the solid wastes B.