Tubular reactor having a fixed bed with a filtering element

A fixed-bed tubular reactor which extends, along a longitudinal axis, between a first end and a second end, comprising

• a bed of catalytic powder confined within an annular space delimited by a first wall of a hollow tube and a second wall of a hollow insert, disposed in the hollow tube and coaxially with the hollow tube, wherein
• the hollow insert comprises at least one distribution chamber and at least one collection chamber, separated from each other by a separating wall, and comprising, respectively, a gas admission opening at the first end and a gas evacuation opening at the second end,
• the second wall comprises at least one distributing opening and at least one collecting opening, which extend over a length, the distributing opening allowing the distribution of a gas capable of being admitted through the admission opening of the distribution chamber towards the annular space, and the collecting opening allowing the collection of the gas distributed in the annular space by the collection chamber,
• the reactor includes at least one filter element positioned at said at least one collecting opening between said at least one collection chamber and the annular space, as well as at the at least one distributing opening between said at least one distribution chamber and the annular space, the at least one filter element preventing passage of catalytic powder from the annular space respectively to said at least one collection chamber and said at least one distribution chamber, and
• the at least one filter element is housed at least partially inside the at least one collecting opening and the at least one distributing opening.