Surface stabilized fully premixed gas premix burner for burning hydrogen gas, and method for starting such burner

A burner for burning a combustible gas comprising at least 50% by volume of hydrogen, wherein said burner is a surface stabilized fully premixed gas premix burner, and wherein said burner is configured to be modulated between a minimum load and a full load,

• said burner comprising:
• a burner surface,
• a premixed gas supply circuit, comprising
• i. an air channel for supplying air,
• ii. a combustible gas channel for supplying combustible gas,
• iii. a mixing channel for mixing air supplied by the air channel and combustible gas supplied by the combustible gas channel into a premixed gas to be supplied to the burner surface, wherein a lambda-value is defined as a ratio between an actually supplied quantity of air and the quantity of air required for stoichiometric combustion of the premixed gas,
• an ignition source for igniting the premixed gas supplied to the burner surface,
• a controller configured to control the lambda-value of the supplied premixed gas by controlling the quantity of air supplied by the air channel and/or the quantity combustible gas supplied by the combustible gas channel, wherein the controller is configured to
• i. supply premixed gas having first lambda-value during a start-up phase of the burner wherein the ignition source is configured to ignite the supplied premixed gas having the first lambda-value, wherein the first lambda-value is at least 1.85, and
• ii. supply premixed gas having a second lambda-value during an operation phase of the burner after the ignition source is configured to ignite the supplied premixed gas having the first lambda-value, wherein the first lambda-value is larger than the second lambda-value.