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[en] In order to enhance energy recovery efficiency from MSW (municipal solid waste), an in-situ steam gasification method for hydrogen production where CaO was used as CO_2 sorbent and catalyst in the process was proposed. The effects of moisture content, the molar ratio of CaO to carbon in wet MSW ([Ca]/[C]) and reactor temperature on H_2 yield and gas composition were investigated. The results showed that maximum hydrogen volumetric concentration (49.42 vol%) and hydrogen yield (277.67 ml/g MSW) were obtained at 40 wt.% moisture content at gasification temperature of 750 °C and [Ca]/[C] ratio of 0.7. The proposed direct gasification of wet MSW with in situ CO_2 capture process may be a promising route to produce hydrogen rich fuel gas using MSW. - Highlights: • CaO addition favors municipal solid waste (MSW) gasification at low temperature. • Maximum H_2 yield and volumetric concentration reached 277.67 ml/g MSW and 49.42 vol%. • A process to produce H_2 rich gas by MSW gasification with CO_2 capture was proposed.