Methods of producing a gas at a variable rate

A method of producing a gas, the method comprising:

• dynamically mixing dry particles comprising a precursor and dry particles comprising a proton-generating species to produce the gas;
• wherein the dry particles comprising the precursor and the dry particles comprising the proton-generating species are dynamically mixed for a first amount of time, after which the dry particles comprising the precursor and the dry particles comprising the proton-generating species are static for a second amount of time, and after the second amount of time the dry particles comprising the precursor and the dry particles comprising the proton-generating species are dynamically mixed for a third amount of time;
• wherein the gas is produced at a rate that is controlled by controlling the first amount of time for which the dry particles comprising the precursor and the dry particles comprising the proton-generating species are dynamically mixed, the second amount of time for which the dry particles comprising the precursor and the dry particles comprising the proton-generating species are static, and the third amount of time for which the dry particles comprising the precursor and the dry particles comprising the proton-generating species are dynamically mixed;
• wherein the dry precursor particles comprise a chlorine dioxide precursor and the gas comprises chlorine dioxide;
• the dry precursor particles comprise a carbon dioxide precursor and the gas comprises carbon dioxide;
• or a combination thereof;
• and
• wherein when the gas is chlorine dioxide 80% or more of the precursor is converted to the gas.