Calcium hydroxide-containing compositions and associated systems and methods

A method of treating an industrial gas stream, the method comprising:

• forming a composition by combining an additive with calcium hydroxide particles, the additive comprising at least one of ethylene glycol, diethylene glycol, triethylene glycol, monoethanolamine, diethanolamine, triethanolamine, sodium or calcium lignosulfonate, wherein a portion of the calcium hydroxide particles comprise a pore volume of at least 0.1 cm3/g and a specific surface area of at least 30 m2/g,
• wherein
• 90% of the calcium hydroxide particles are less than a first cross-sectional dimension of 50 microns,
• 10% of the calcium hydroxide particles are less than a second cross-sectional dimension,
• a ratio of the first cross-sectional dimension to the second cross-sectional dimension is no more than 25, and
• the calcium hydroxide particles comprise at least 90% by volume of the composition;
• and
• dispersing the composition into ducting configured to flow an industrial gas stream comprising acid, the composition being configured to remove the acid from the industrial gas stream.