NOVELTY - The device comprises a container (11) for receiving adsorbent material comprising a fluid inlet opening (14) and a fluid outlet opening (16), two fluid connection devices (17), where one of the fluid connection devices is arranged to the fluid inlet opening and the other fluid connection device is arranged to the fluid outlet opening, two fluid line fittings that are formed such that each of the fittings are connectable with one or two fluid connection devices and a fluid line, and a thermally activated fluid blocking device and/or a fluid flow monitor.    USE - The device is useful for adsorption treatment of fluid or fluid stream including natural gas or liquefied gas for fuel cells, and for desulfurization of gaseous hydrocarbon stream.    ADVANTAGE - The device ensures safe and simple adsorption treatment of fluid or fluid stream and desulfurization of gaseous hydrocarbon stream in a reliable manner.    DETAILED DESCRIPTION - The device comprises a container (11) for receiving adsorbent material comprising a fluid inlet opening (14) and a fluid outlet opening (16), two fluid connection devices (17), where one of the fluid connection devices is arranged to the fluid inlet opening and the other fluid connection device is arranged to the fluid outlet opening, two fluid line fittings that are formed such that each of the fittings are connectable with one or two fluid connection devices and a fluid line, and a thermally activated fluid blocking device and/or a fluid flow monitor. The fluid connection devices are sealed in a fluid-tight manner and are formed such that each of the fluid connection devices is connectable with a fluid line connector and resealable under the condition so that the devices are connected, resealable or sealable to the respective fluid line connector. The fluid line fittings of the resealable fluid connection devices and/or fluid connection devices are formed such that the fluid line fittings in the fluid connection devices are secured and/or the fluid connection devices are designed such that the devices are manually or automatically sealed by means of the respective fluid line connectors and/or one of the fluid connection devices is formed such that the device is simultaneously and subsequently connectable and sealable with the respective fluid line fittings. Each of the fluid connection devices has a fluid flow channel (19) and a movable closure member, where the closure member is sealed to the fluid flow channel in a fluid-tight manner and the fluid connection devices are formed such that each closure member is movable by connecting the fluid connection device with the fluid line fittings and the fluid flow channel opens and/or moving the fluid line fittings by releasing and the fluid flow channel seals. The container comprises adsorbent materials for desulfurizing liquefied gas, natural gas or contains other hydrocarbons, and/or the container contains several adsorbent materials in a mixed bed or as a multicomponent adsorbent material. The container comprises an opening- and sealing-element for reversible filling with the adsorbent material comprising a safety device for preventing unauthorized tampering such as cover, the opening- and sealing-elements and a special screw that is opened only with special tool. The container is formed so that it is vertically installed and comprises a cavity adjacent to the fluid inlet opening, or a cavity with a filling or limiting from porous and/or flexible inert material or polymer foam for collecting condensate, where the cartridge and/or adsorbent material are formed such that they can be used at temperature of -10 degrees C to +90 degrees C and a pressure of -500 mbar above atmospheric pressure of +10 bar. The container comprises a bed length-to-bed diameter ratio of 0.1-40 and/or a space velocity in the container is less than 10000/hour, relative to the total amount of adsorbent material and/or the bed-to-particle ratio of adsorbent material is greater than 10. The outer length of the container between the fluid inlet opening and the fluid outlet opening is 729 mm. The device including the fluid connection devices has a length of 871 mm. The container has an external diameter of 110 mm and/or an internal diameter of 90 mm. The container has a length of 717 mm, and a first opening including fluid inlet opening and fluid outlet opening comprises a pipe piece with a length of 33 mm and/or a compression connector is provided that is connected with the associated fluid connection device. A fitting or bulkhead fitting is provided in a second opening including fluid inlet opening and the fluid outlet opening, where the bulkhead fitting of the container extends up to 6 mm. The fluid connection devices have 90 degrees angled shape and/or the fluid connection device comprises an outlet opening for connecting with respective fluid line fitting in their respective free ends, where the distance from the center of the outlet opening is 839 mm.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic representation of a device for adsorption treatment of fluid or fluid stream.    Container (11)    Fluid inlet opening (14)    Fluid outlet opening (16)    Fluid connection device (17)    Fluid flow channel. (19)