METAL SUPPORT, SUPPORTED METAL CATALYST, PRODUCTION METHOD FOR AMMONIA, PRODUCTION METHOD FOR HYDROGEN, AND PRODUCTION METHOD FOR CYANAMIDE COMPOUND
FIG3 is a graph showing the results of a stability evaluation test for the catalyst of Example 1  FIG4 is a graph showing the results of the ammonia decomposition reaction shown in Example 6, Comparative Example 5 and Comparative Example 6 
The ammonia synthesis reaction was continued at a reaction temperature of 400 °C for 92.5 hours to evaluate the stability of the catalyst. FIG3 shows the results of ammonia synthesis using 2 wt% Ru/CaCN2 of Example 1 as a catalyst. The catalyst activity gradually elevated from the start of the reaction and showed a constant value in about 70 hours. No decrease in catalytic activity was confirmed during the reaction, and it was found that ammonia was stably generated even in the reaction of 90 hours or more.  Using 2 wt% Ru/CaCN2 prepared in Example 1 as a supported metal catalyst, ammonia decomposition reaction to produce nitrogen and hydrogen was carried out. 0.1 g of the supported Ru material was packed in a glass tube as an ammonia decomposition catalyst, and the reaction was carried out in a fixed bed flow reactor. The gas flow rate was set to NH3: 5 mL/min, and the reaction pressure was 0.1 MPa. The gas discharged from the fixed bed flow reactor was quantified by a gas chromatograph. The conversion of ammonia decomposition at 400 °C was 76.4%. The results are shown in FIG4. Using this as a catalyst, an ammonia decomposition reaction was carried out under the same conditions as in Example 10. The conversion of ammonia decomposition at 400 °C was 47.3%. The results are shown in FIG4. Using this as a catalyst, an ammonia decomposition reaction was carried out under the same conditions as in Example 6. The conversion for ammonia decomposition at 400 °C was 25.9%. The results are shown in FIG4.
graph
80
preferably
100
preferably
400
4
example Table
2
Document was
200
is usually
20
preferably
250
preferably
300
preferably
40
BET specific surface area
1000
may be Porapak Q4
3
preferably was Table
60
lime nitrogen is usually reaction was THF solution
['1. A supported metal material in which a transition metal is supported on a support, wherein the support is a cyanamide compound represented by the following general formula (1): \u2003\u2003\u2003\u2003\u2003\u2003\u2003\u2003MCN2\u2003\u2003\u2003\u2003\u2003(1) wherein M represents a group II element of the periodic table, and a specific surface area of the cyanamide compound is 1 m 2  g  -1  or more.']