Patent ID: 9221011
Filing Date: 2015-12-29
Classification: B01D,C01B,C01D,Y02A,Y02C,Y02E

Abstract:
1. A method of removing carbon dioxide from an industrial emission by absorbing carbon dioxide, comprising the steps of: converting a potassium compound from a first industry into potassium hydroxide using energy from a second industry, wherein a locus of the second industry is adjacent a locus of the converting step; absorbing carbon dioxide from emissions from the second industry by contacting the emissions with a potassium carbonate-containing absorption solution in an absorption column of a carbonate absorption/stripping system to produce a potassium bicarbonate-containing rich solution; reacting sulphur oxides from emissions from the second industry with potassium carbonate of the potassium carbonate-containing absorption solution and oxygen to produce potassium sulphate and/or reacting nitrogen oxides from emissions from the second industry with potassium carbonate of the potassium carbonate-containing absorption solution and oxygen to produce potassium nitrate; feeding the potassium hydroxide to the carbonate absorption/stripping system to provide makeup potassium to the potassium carbonate-containing absorption solution; removing absorbed carbon dioxide from the potassium bicarbonate-containing rich solution as carbon dioxide by converting the potassium bicarbonate to potassium carbonate in a regeneration column of the carbonate absorption/stripping system to regenerate the potassium carbonate-containing absorption solution; recycling the regenerated potassium carbonate-containing absorption solution to the absorbing step; recovering potassium sulfate and/or potassium nitrate from the carbonate absorption/stripping system; providing at least part of the recovered potassium sulfate and/or potassium nitrate to the first industry; and wherein the first industry is a fertilizer industry and the second industry is a power industry.