CO2直接合成碳酸二甲酯实验装置
An experimental apparatus for the direct synthesis of dimethyl carbonate from CO2 using a three-stage reactor connected in series solves the problems of complex and inefficient CO2 synthesis processes in existing technologies, and realizes efficient utilization of CO2 resources and low-cost synthesis of DMC.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHAANXI HYDROGEN ENERGY RES INST CO LTD
- Filing Date
- 2025-07-07
- Publication Date
- 2026-07-17
AI Technical Summary
Existing systems for the direct synthesis of dimethyl carbonate from CO2 have complex processes, low CO2 utilization and conversion rates, high equipment costs and energy consumption, and numerous byproducts, making it difficult to meet the development needs of green chemistry and carbon reduction.
A three-stage reactor was used, namely the first reactor, the second reactor and the third reactor. CO was produced by reverse water-gas shift, CO was hydrogenated to synthesize methanol, and finally methanol was combined with CO2 to synthesize DMC. The reactors were connected in series in the same experimental device, and H2 was introduced in a reducing atmosphere to improve selectivity.
It improves CO2 conversion rate and DMC yield, simplifies process flow, reduces equipment investment, and has the dual advantages of being green, environmentally friendly, low-carbon, and economical, thereby improving reaction efficiency and product yield.
Smart Images
Figure CN224507045U_ABST
Abstract
Claims
1. A device for directly synthesizing dimethyl carbonate from CO2, characterized in that: The experimental apparatus is a three-stage reactor, including a first reactor and a third reactor. Both the first and third reactors are externally connected to raw material gas input pipelines. The experimental apparatus also includes a first condenser and a second reactor. The product inlet of the first condenser is connected to the reactant outlet of the first reactor through the reaction product outlet pipeline of the first reactor. The product outlet of the first condenser is connected to the inlet of the second reactor through the material input pipeline of the second reactor. The reaction product outlet pipeline of the second reactor and the third reactor are both connected to the raw material gas input pipeline. The experimental apparatus also includes a second condenser, which is connected to the product outlet of the third reactor through the product outlet pipeline of the third reactor. 2.The CO 2 direct synthesis of dimethyl carbonate experimental device according to claim 1, characterized in that: The experimental apparatus includes: a first preheating furnace (7) and a gas mixer (6) connected to the inlet of the first preheating furnace (7). The first preheating furnace (7) is connected to the raw material gas inlet of the first reactor (9) through a raw material gas input pipeline. 3.The experimental device for direct synthesis of dimethyl carbonate from CO 2 according to claim 2, characterized in that: The experimental apparatus includes: a raw material gas cylinder (1) and a carrier gas cylinder (2). The raw material gas input pipeline is connected to the outlet of the raw material gas cylinder (1) and the carrier gas cylinder (2) respectively. A raw material gas flow meter (3) is provided on the outlet pipeline near the raw material gas cylinder (1). A carrier gas flow meter (4) is provided on the outlet pipeline near the carrier gas cylinder (2). A one-way valve (5) is provided on the raw material gas input pipeline. The outlet pipeline of the raw material gas cylinder (1) and the outlet pipeline of the carrier gas cylinder (2) are connected on one side of the connecting end of the one-way valve (5). The gas mixer (6) is located on one side of the shut-off end of the one-way valve (5). 4.The CO 2 direct synthesis of dimethyl carbonate experimental device according to claim 1, characterized in that: The first reactor reaction product output pipeline between the first condenser (13) and the first reactor (9) is equipped with a second pressure reducing valve (10); the experimental device also includes: a first filter (11), and a second preheating furnace (16) connected to the first filter (11) through the second reactor material input pipeline. The outlet of the first filter (11) is connected to the outlet of the first condenser (13) through the second reactor material input pipeline, and the material outlet of the second preheating furnace (16) is connected to the material inlet of the second reactor (17) through the second reactor material input pipeline.
5. The experimental device for direct synthesis of dimethyl carbonate from CO2 according to claim 4, characterized in that: The material input pipeline of the second reactor between the first filter (11) and the second preheater (16) is provided with a first back pressure valve (12) and a first shut-off valve (15) in sequence according to the material flow direction. 6.The experimental device for direct synthesis of dimethyl carbonate from CO 2 according to claim 2, characterized in that: The experimental apparatus includes a gas mixer group (22) and a third preheating furnace (23). The inlet of the gas mixer group (22) is connected to the product outlet of the second reactor (17) through the product output pipeline of the second reactor. The inlet of the third preheating furnace (23) is connected to the outlet of the gas mixer group (22) through the product output pipeline of the second reactor. The outlet of the third preheating furnace (23) is connected to the inlet of the third reactor (24) through the product output pipeline of the second reactor.
7. The experimental device for direct synthesis of dimethyl carbonate from CO2 according to claim 6, characterized in that: The gas mixer assembly (22) and the second reactor (17) are connected by a third pressure reducing valve (18), a second back pressure valve (19), a second shut-off valve (20) and a second check valve (21) in sequence according to the product flow direction. A raw material gas pipeline is led out from the raw material gas input pipeline of the first preheating furnace (7) and the gas mixer (6). The raw material gas pipeline is connected to the second reactor reaction product output pipeline between the second one-way valve (21) and the gas mixer group (22), and the raw material gas pipeline is equipped with a first pressure reducing valve (8). 8.The experimental device for direct synthesis of dimethyl carbonate from CO 2 according to claim 1, characterized in that: A fourth pressure reducing valve (25) is provided in the product outlet pipeline of the third reactor (24) between the third reactor (24) and the second condenser (26); a non-condensable gas outlet pipeline is provided at the outlet of the second condenser (26); The experimental apparatus further includes a second filter (27), which is installed on the non-condensable gas outlet pipeline. The non-condensable gas outlet pipeline of the second filter (27) is also provided with a third back pressure valve (28) and a third shut-off valve (29). 9.The experimental device for direct synthesis of dimethyl carbonate from CO 2 according to claim 1, characterized in that: The experimental apparatus also includes a gas chromatograph (30), which is connected to the second filter (27) through a non-condensable gas outlet pipeline, and a third back pressure valve (28) and a third shut-off valve (29) located on the non-condensable gas outlet pipeline between the gas chromatograph (30) and the second filter (27). 10.The experimental device for direct synthesis of dimethyl carbonate from CO 2 according to claim 1, characterized in that: The experimental apparatus further includes a circulation pump (14), which is connected to the condensing medium inlet and outlet of the first condenser (13) and the second condenser (26) respectively, and forms a circulation loop with the condensing medium pipelines of the first condenser (13) and the second condenser (26). The circulation pump (14) is a centrifugal pump.