CN-121978264-A - Solid reactant gas catalytic reaction activity evaluation device

CN121978264ACN 121978264 ACN121978264 ACN 121978264ACN-121978264-A

Abstract

The invention discloses a solid reactant gas catalytic reaction activity evaluation device which comprises a reaction tube, wherein a reactant gas inlet is formed in the upper end of the reaction tube, a reactant supply area, a catalytic reaction area and a product cleaning area are sequentially formed in the reaction tube from top to bottom, a catalyst layer is arranged in the catalytic reaction area and is in sealing fit with the inner wall of the reaction tube, a reactant container I with an upper opening is arranged in the reactant supply area, a reactant container II is further arranged outside the reaction tube, the lower end of the reactant container II is communicated with the lower end of the reactant container I through a pipeline, a sealing cover is arranged at the upper end of the reactant container II, a product cleaning area is provided with a product collecting container, the opening end of the product collecting container is positioned in the product cleaning area and is in detachable sealing connection, and a heating layer is arranged at the outer wall of the reaction tube corresponding to the catalytic reaction area and the reactant supply area. The invention realizes the online replenishment of reactants, does not need shutdown, cooling and cleaning, and can support the durability evaluation of the catalyst for more than 1000 hours.

Inventors

ZHENG YONG
LEI ZHENDONG
LIU FUJIAN
XIAO YIHONG
XIAO XIANGYU
JIANG LILONG

Assignees

福州大学
同济大学

Dates

Publication Date: 20260505
Application Date: 20260109

Claims (7)

1. A solid reactant gas catalytic reaction activity evaluation device is characterized by comprising a reaction tube (1), wherein a reactant gas inlet (11) is formed in the upper end of the reaction tube (1), a reactant supply area (1 a), a catalytic reaction area (1 b) and a product cleaning area (1 c) are sequentially formed in the reaction tube (1) from top to bottom, a catalyst layer (2) is mounted in the catalytic reaction area (1 b), the catalyst layer (2) is in sealing fit with the inner wall of the reaction tube (1), a reactant container I (3) with an upper opening is formed in the reactant supply area (1 a), a reactant container II (4) is further arranged outside the reaction tube (1), the lower end of the reactant container II (4) is communicated with the lower end of the reactant container I (3) through a pipeline, a sealing cover (41) is arranged at the upper end of the reaction container II (4), a product collecting container (5) is arranged in the product cleaning area (1 c), the opening end of the product collecting container (5) is positioned at the inner wall of the reaction tube (1), and the reaction container I (1) is in a detachable mode, and the reaction container (1 b) is in a sealing mode and a corresponding heating area (6) is arranged at the outer wall of the reaction tube (1).
2. The solid reactant gas-gas catalytic activity evaluation apparatus according to claim 1, wherein an insulating layer (7) is provided at the outer wall of the reactant container II (4) and at the outer wall of the reaction tube (1) corresponding to the product cleaning region (1 c), respectively.
3. The device for evaluating the activity of the gas-gas catalytic reaction of the solid reactant according to claim 2, wherein the product collecting container (5) is of a barrel-shaped structure with an opening at the upper end and a gas outlet hole (51) at the lower end, a high-temperature resistant filter layer (8) is paved on the inner wall of the product collecting container, a sealing ring (9) is arranged at the outer side of the opening at the upper end close to the product collecting container (5), and the product collecting container (5) and the inner wall of the product cleaning area (1 c) are tightly screwed and sealed.
4. The apparatus for evaluating the activity of a gas-gas catalytic reaction for a solid reactant according to claim 3, wherein the reactant container II (4) is provided with a scale.
5. The apparatus for evaluating the activity of a gas-gas catalytic reaction for a solid reactant according to claim 4, wherein the height of the reactant container II (4) is equal to or greater than the height of the reactant container I (3).
6. The solid reactant gas catalytic activity evaluation apparatus according to any one of claims 1 to 5, wherein the catalyst layer (2) comprises a catalyst sample (21) and a fastener (22), the catalyst sample (21) being fixed in the catalytic reaction zone (1 b) by the fastener (22).
7. The device for evaluating the activity of the gas-gas catalytic reaction of the solid reactant according to claim 6, wherein the reaction tube (1), the reactant container I (3) and the reactant container II (4) are integrally formed.

Description

Solid reactant gas catalytic reaction activity evaluation device Technical Field The invention relates to the technical field of catalytic performance evaluation equipment, in particular to a device for evaluating the activity of gas catalytic reaction of a solid reactant. Background In the field of catalytic material research and development, the activity and durability evaluation of a catalyst is one of the key links, and particularly aims at reactants (such as solid alcohols, solid organic acids, low-melting metal organic matters and the like) which are solid at normal temperature and are liquefied or gasified after heating and take part in the reaction, and the corresponding gas-gas catalytic reaction generally needs a reaction temperature of 300-500 ℃, so that the evaluation device of the reaction has various technical bottlenecks such as the problem of discontinuous defect of reactant replenishment. The reactant containers of the existing catalytic evaluation device (such as a fixed bed reactor) are mostly of a single closed structure, reactants can be filled only once, after the normal-temperature solid reactants are liquefied and consumed, the device is required to be stopped for cooling and opened for supplementing samples, so that the reaction process is interrupted, the catalyst activity is abnormal due to temperature fluctuation (such as catalyst sintering is easy to cause when the catalyst is stopped at high temperature), and continuous and stable catalyst life data cannot be obtained. In addition, plugging and maintenance problems of the reaction outlets often occur in this type of reaction. The liquefied reactant which is not completely reacted or the reaction product with higher melting point can reach a low-temperature outlet area along with the air flow, and is quickly condensed into solid particles (such as the reaction of the reactant or the product which is sulfur), the outlet of the traditional device is mostly of a straight pipe structure, no special capturing and cleaning component exists, the solid particles are easy to accumulate and block the pipeline, the reaction pressure is suddenly increased, the air flow is interrupted, and the experiment is forced to be terminated in advance. Although the filtering component is additionally arranged in part of the device, the filtering component and the reaction tube are integrally designed, the whole reaction system is required to be disassembled during cleaning, the operation is complex and time-consuming (1-2 h is required for single cleaning), and the experimental efficiency is seriously affected. In summary, the prior art cannot meet the requirement of catalyst durability evaluation of on-line reactant supply and rapid outlet solid cleaning, and a special experimental device with high integration, continuity and suitability is needed. Disclosure of Invention In order to solve the problems of online reactant supply and outlet condensation solid state cleaning in the prior art, the invention provides the solid reactant gas catalytic reaction activity evaluation device, which can realize online reactant supply without shutdown cooling, solves the core pain point of the traditional device of shutdown interruption experiment, and can support catalyst durability evaluation for more than 1000 hours. The technical scheme adopted is as follows: The device comprises a reaction tube, wherein a reaction gas inlet is formed in the upper end of the reaction tube, a reactant supply area, a catalytic reaction area and a product cleaning area are sequentially formed in the reaction tube from top to bottom, a catalyst layer is installed in the catalytic reaction area and is in sealing fit with the inner wall of the reaction tube, a reactant container I with an upper opening is arranged in the reactant supply area, a reactant container II is further arranged outside the reaction tube, the lower end of the reactant container II is communicated with the lower end of the reactant container I through a pipeline, a sealing cover is arranged at the upper end of the reaction container II, a product collecting container is arranged in the product cleaning area, the opening end of the product collecting container is located in the product cleaning area and is in detachable sealing connection, and a heating layer is arranged at the outer wall of the reaction tube corresponding to the catalytic reaction area and the reactant supply area. Further, an insulating layer is respectively arranged at the outer wall of the reactant container II and the outer wall of the reaction tube corresponding to the product cleaning area. Preferably, the product collecting container is of a barrel-shaped structure with an opening at the upper end and an air outlet at the lower end, a high-temperature resistant filter layer is paved on the inner wall of the product collecting container, a sealing ring is arranged at the outer side of the opening at the upper end of the product collectin