Carbon dioxide removing thermal insulation material composition and production method thereof

A method for manufacturing of a carbon dioxide removing thermal insulation material composition, for forming parts of sustainable buildings, the method comprising:

• I. Providing an amount of pyrolysed thermal insulation biomass particles with sheet-like or rod-like geometry such that the particles are constrained in one and two spatial dimensions, respectively, where the particles can also be bent in their shape, where the average aspect ratio, i.e. the ratio of the maximum spatial extension to the maximum spatial extension in the constrained dimensions of each biomass particle is at least 6, and
• where the maximum extension of the sheets and the maximum length of the rods are between 2 and 60 mm, and
• the constrained dimensions of the sheets/rods are on average between 0.1 mm and 3 mm,
• II. Binding the pyrolysed thermal insulation biomass particles into a cohesive material composition introducing geometrical constraints with an additionally introduced binder, most preferred with a subsequent curing step of the binder, resulting in a carbon dioxide removing thermal insulation material composition with an interparticle porosity with pores distributed homogeneously over the entire material composition volume, with average cross-sections in the range between 0.01 mm to 4 mm.

A carbon dioxide removing thermal insulation material composition, comprising a cohesive mixture of an amount of thermal insulation pyrolysed biomass particles and a binder, which may or may not be pyrolysed depending on the manufacturing method, for forming parts of sustainable buildings,

• wherein:
• the binder was an intrinsic part of the raw, unpyrolysed biomass, such as lignin or starch, later pyrolysed with the unpyrolysed biomass;
• or
• the binder was unpyrolysed and additionally introduced before or after pyrolysis, comprising starch, wood glue, cellulose, lignin, tannin, bioplastics, protein, gluten, geopolymers, adobe or clay or mixtures thereof;
• wherein the carbon dioxide removing thermal insulation material composition comprises
• pyrolysed thermal insulation biomass particles
• with sheet-like or rod-like geometry such that the particles are constrained in one and two spatial dimensions, respectively, and which can also be bent in their shape,
• where the average aspect ratio, i.e. the ratio of the maximum spatial extension to the maximum spatial extension in the constrained dimensions, is at least 6, and
• where the maximum expansion of the sheets and the maximum length of the rods are between 2 and 60 mm, and the constrained dimensions of the sheets/rods are on average between 0.1 mm and 3 mm,
• based on wheat straw, wheat bran, wheat grain, wheat husk, sunflower stalks, peanut shells, tree leaves, bamboo, reeds, typha, seagrass, corn stalks, corn cobs, corn grain, miscanthus stalks, hemp hurd, hemp fibres, cotton fibre from recycled clothing, wood fibres, wood wool, wood shavings, cardboard, paper or coffee silverskin or mixtures thereof, with densities below 100 kg/m3, so that an interparticle porosity of the carbon dioxide removing thermal insulation material composition with pores distributed over the entire material composition volume, with average cross-sections in the range between 0.01 mm to 4 mm exists in order to show a thermal conductivity of the thermal conductivity along the direction of heat flow of the material composition≤40 mW/(m·K), measured according to EN 12667 with material conditioning at room temperature and 50% relative humidity.