Method of preparation of a CO₂removal sorbent with high chemical stability during multiple cycles

摘要

Method for the production of a clay-alkali-amine CO2 sorbent prepared by integrating a clay substrate, basic alkali salt, and amine liquid. The basic alkali salt is present relative to the clay substrate in a weight ratio of from about 1 part to about 50 parts per 100 parts of the clay substrate. The amine liquid is present relative to a clay-alkali combination in a weight ratio of from about 1 part to about 10 parts per 10 parts of the clay-alkali combination. The clay substrate and basic alkali salt may be combined in a solid-solid heterogeneous mixture and followed by introduction of the amine liquid. Alternatively, an alkaline solution may be blended with the amine solution prior to contacting the clay substrate. The clay-alkali-amine CO2 sorbent is particularly advantageous for low temperature CO2 removal cycles in a gas stream having a CO2 concentration less than around 2000 ppm and an oxygen concentration around 21%, such as air. Results are presented illustrating the performance of the clay-alkali-amine CO2 sorbent compared to a clay-amine sorbent lacking the alkali inclusion.

主权项

1. A method of making a clay-alkali-amine CO2 sorbent comprising:
supplying a clay substrate; supplying a basic alkali salt, where the basic alkali salt is supplied at from about 1 part to about 50 parts per 100 parts of the clay substrate by weight; supplying an amine liquid comprised of an amine, where the amine liquid is supplied at from about 1 part to about 10 parts per 10 parts of a clay-alkali combination by weight, where the clay-alkali combination is a combined proportion of the clay substrate and the basic alkali salt; and integrating the clay substrate, the basic alkali salt, and the amine liquid, thereby producing the clay-alkali-amine CO2 sorbent.