Process for capturing a heavy metal contained in a wet gas incorporating a heat pump for heating the gas introduced into a capturing body

• Main Authors: Barthelet, Karin, Lepine, Yann, Porcheron, Fabien, Guillou, Florent, Jubin, Clotilde, Baudot, Arnaud
• Format: Patent
• Language: English
• Published: 12.07.2018
• Subjects: ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE ORUNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; CHEMISTRY; FIRELIGHTERS; FUELS; FUELS NOT OTHERWISE PROVIDED FOR; LIQUEFIED PETROLEUM GAS; LUBRICANTS; METALLURGY; NATURAL GAS; PEAT; PERFORMING OPERATIONS; PETROLEUM, GAS OR COKE INDUSTRIES; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K; TECHNICAL GASES CONTAINING CARBON MONOXIDE; TRANSPORTING

The process for capturing at least one heavy metal, chosen from mercury and arsenic, contained in a wet gas comprising steam, comprises the following steps: a) the wet gas is heated (1001) by heat exchange with a compressed heat transfer fluid obtained in step e) so as to obtain a condensed heat transfer fluid and a gas heated to a temperature Tc, b) the heated gas obtained in step a) is brought into contact with a body for capturing said heavy metal (2000) in order to obtain a gas depleted in heavy metal, c) the cooled heat transfer fluid obtained in step a) is expanded (4000), d) the gas depleted in heavy metal is cooled (1003) by heat exchange with the heat transfer fluid produced in step c) so as to obtain a gas cooled to a temperature Tf, the heat transfer fluid being vaporized during step d), e) the vaporized heat transfer fluid obtained in step d) is compressed (3000) so as to obtain a compressed heat transfer fluid, the compressed heat transfer fluid being recycled to step a).