At the end of the 1870s, Størmer travelled to France, and constructed a charcoal factory in Suresnes. In 1878, Størmer was appointed official reporter of Norway at the Exposition Universelle in Paris. In his exposition report, Størmer recommended construction of cellulose factories in Norway. On his return to Norway in the late 1880s, Størmer initiated construction of cellulose factories in Moss, Ranheim and Bamble. He died on 29 December 1900 after being run over by a tram.