Abstract: A method of making a material for capturing carbon dioxide from the earth's atmosphere, comprises producing an acid and a base with an electrochemical acid-base generator; dissolving a mineral in the acid to produce a mineral rich solution, separating silica from the mineral rich solution to form a silica depleted solution; adding a first portion of the base to the silica depleted solution to remove impurities by precipitation, adding a second portion of the base until ferrous hydroxide (Fe(OH)2) precipitates, then pausing base addition and removing the ferrous hydroxide precipitate from the solution. Then adding a third portion of the base to the iron-depleted solution to precipitate magnesium hydroxide (Mg(OH)2) and/or calcium hydroxide (Ca(OH)2).

Abstract: A portable space heater is provided in which a sealed vessel includes electrical heating elements for containing a fluid to be heated. A cooling tube communicates between an outlet at a top of the vessel and an inlet pipe extending down into the vessel. The inlet pipe includes an open top end for operating the vessel substantially at atmospheric pressure. A cooling fan directed at the cooling tube causes steam escaping from the outlet of the vessel to be condensed and returned at the inlet pipe. Plural independent electrical heating elements are provided for accurate control of heat output from the heater. The fan includes an inlet pipe extending upwardly thereabove for drawing air from the top of a space to be heated.