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The purpose of the research is to develop the high performance solar chemical reactor for producing hydrogen using steam reforming reaction of methane. A specific shape chemical reactor is suggested:spiral type reactor. The reactor is installed on the dish-type solar thermal system of Inha University. The temperatures, CH4 conversion rates, and H2 proportion are measured. At specific condition, CH4 conversion rates of the spiral type reactor are about 91%, and H2 proportion are about 66%. The spiral type reactor gives reasonably good performance without any problems caused by highly concentrated solar radiation.