Abstract: Methods of dewatering tailings, including tailings streams that may include a clay, ultra-fine particles, or both. The methods may include providing a tailings stream, dewatering the tailings stream with a dewatering apparatus to produce a first cake and a first residual effluent stream, contacting the first residual effluent stream with one or more additives, and dewatering the first residual effluent stream with a solid bowl centrifuge to produce a second cake and a second residual effluent stream. The methods may include providing a tailings stream, contacting the tailings stream with one or more additives, and dewatering the tailings stream with a solid bowl centrifuge to produce a first cake and a first residual effluent stream.

Abstract: The disclosure utilizes a hydroxide sorbent for humidification and CO2 removal from a gaseous stream comprised of CO and CO2 prior to entry into a water-gas-shift reactor, in order to decrease CO2 concentration and increase H2O concentration and shift the water-gas shift reaction toward the forward reaction products CO2 and H2. The hydroxide sorbent may be utilized for absorption of CO2 exiting the water-gas shift reactor, producing an enriched H2 stream. The disclosure further provides for regeneration of the hydroxide sorbent at temperature approximating water-gas shift conditions, and for utilizing H2O product liberated as a result of the CO2 absorption.