PROCESS FOR CAPTURING A HEAVY METAL CONTAINED IN A WET GAS INCORPORATING A HEAT PUMP FOR COOLING THE GAS BEFORE REMOVAL OF THE WATER

• Main Authors: PORCHERON, Fabien, BAUDOT, Arnaud, JUBIN, Clotilde, LEPINE, Yann, GUILLOU, Florent, BARTHELET, Karin
• Format: Patent
• Language: English
• Published: 08.11.2019

A process for capturing a heavy metal selected from mercury and arsenic from a moist gas comprising water vapour, in which the following steps are cruried out: a) cooling (1000) the moist gas by heat exchange with a heat transfer fluid produced in step e) in order to obtain a gas cooled to a temperature Tf, the heat transfer fluid being vaporized during step a); b) separating (2000) the condensed water and condensates contained in the cooled gas obtained in step a) in a maimer such as to obtain a gas which is depleted in water and a liquid strerun containing water; c) compressing (4000) the vaporized heat transfer fluid obtained from step a) in a manner such as to obtain a compressed heat transfer fluid; d) heating (1002) the water-depleted gas by heat exchange with the compessed heat transfer fluid obtained in step c) in order to obtain a cooled heat transfer tluid and a gas reheated to a temperature Tc; e} decompressing (5000) the cooled heat transfer fluid obtained in step d), the decompressed heat transfer fluid being recycled to step a); 1) bringing the reheated gas obtained in step d) into contact (3000) with a capture mass in for said heavy metal.