Four‑tube fixed bed

A four‑bed fixed‑bed reactor is a type of chemical process equipment commonly used in catalytic reactions or adsorption processes. The equipment consists of four independent reaction zones, or beds, each of which can be packed with different catalysts or adsorbents—or with the same material to carry out distinct stages of a reaction. The primary advantage of the four‑bed fixed‑bed design is its ability to perform multiple reaction steps simultaneously, thereby enhancing production efficiency and process flexibility. In a four‑bed fixed‑bed reactor, raw gas or liquid flows sequentially through each bed, with each bed capable of independent control over parameters such as temperature, pressure, and residence time. This configuration allows for sequential, stepwise, or parallel reactions to be carried out in different beds, enabling optimization of the overall process in terms of conversion rate and selectivity. The four‑bed fixed‑bed reactor finds wide application in fields such as petroleum refining, fine chemical synthesis, environmental engineering (e.g., exhaust gas treatment), and bioengineering. For example, in petroleum refining, it can be employed for cracking, reforming, isomerization, and alkylation reactions, among others. Because the four‑bed fixed‑bed reactor involves multiple reaction zones, it places high demands on operational control and process monitoring. A precise control system is required to adjust the reaction conditions in each bed and ensure the stable operation of the entire system. In addition, the selection of catalysts or adsorbents, the design of the beds, and the optimization of fluid dynamics are all critical factors in ensuring the efficient operation of the four‑bed fixed‑bed reactor.

6-Channel Fixed-Bed Catalyst Evaluation System

The 6‑channel fixed‑bed catalyst evaluation system is a high‑throughput platform designed for multiphase catalyst screening experiments. It primarily comprises a gas distribution module, a liquid distribution module, 6‑channel reactors, a liquid collection module, an online gas sampling interface, and a system pressure control module. Drawing on advanced technology and years of accumulated expertise, YanZheng Instruments ensures temperature consistency across each reactor channel, enabling the six reactor channels to operate within acceptable temperature and pressure ranges.

Micro Fixed Bed

The YZuBPR series from YanZheng Instruments is a miniature fixed-bed reactor system. This reactor system is widely applicable for evaluating various catalysts and reaction process conditions under gas–solid phase or trickle-flow conditions, including catalyst screening, compositional screening and optimization of multi‑component catalysts, optimization of reaction conditions and processes, as well as catalyst life studies. The YZuBPR system from YanZheng can also be custom‑designed according to users’ experimental conditions and research objectives, perfectly aligning with the actual application needs of end users.

Small fixed bed

The design and operation of microfixed‑bed reactors require a high degree of precision to ensure the reliability and reproducibility of experimental results. Researchers must select appropriate catalysts and reaction conditions based on their experimental objectives, and perform proper calibration and maintenance on the reactor. By using this type of apparatus, industrial catalytic cracking processes can be simulated on a smaller scale, providing crucial experimental data for catalyst development, process optimization, and reaction mechanism studies.

Joule Heating Fixed Bed

The Joule-heated fixed bed uses pulsed or steady DC current output from a Joule heating power supply to rapidly heat the reaction tube. Combined with precise control of gas input, preheating, and auxiliary heating within the reactor body, it achieves the conditions required for the reaction. Compared with traditional heating methods, Joule heating can significantly improve reaction efficiency and reduce operating costs. Moreover, the design of the Joule-heated fixed bed offers high flexibility: you can choose to upgrade a conventional furnace to a Joule heating power supply based on actual needs, or add a Joule heating power supply while retaining the existing conventional furnace, thereby meeting the requirements of various processes and experiments.

Catalytic Cracking Micro Fixed-Bed Reactor

The catalytic cracking microfixed-bed reactor is a laboratory-scale device used to simulate industrial catalytic cracking processes. It typically consists of a small fixed-bed reactor packed with a specific catalyst, which facilitates the cracking of hydrocarbon feedstocks under high-temperature and high-pressure conditions. This type of apparatus enables researchers to investigate, in a controlled environment, the kinetics of cracking reactions, catalyst performance, product distribution, and the influence of reaction conditions on the cracking process. The design and operation of the catalytic cracking microfixed-bed reactor demand a high degree of precision to ensure the reliability and reproducibility of experimental results. Researchers must select appropriate catalysts and reaction conditions based on their experimental objectives, and perform proper calibration and maintenance of the apparatus. By using this device, industrial catalytic cracking processes can be simulated on a smaller scale, providing crucial experimental data for catalyst development, process optimization, and the study of reaction mechanisms.

Membrane Reactor Fixed-Bed Evaluation System

The membrane reactor fixed-bed evaluation unit is primarily used to evaluate and study process operations, explore optimal process parameters, and provide foundational design data for pilot-scale and industrial-scale process design. It features a high‑precision electronic metering system for gas and liquid feed, an integrated nano‑scale membrane tube sparging module that transforms liquid substrates into a milky emulsion-like state. The membrane tube assembly includes a visual inspection window for real‑time monitoring, an ultra‑long constant‑temperature reaction zone, and a large loading capacity of 50 mL.

Fixed-Bed Catalyst Evaluation System

The fixed-bed catalyst evaluation unit can be used to assess key performance indicators such as catalyst activity, selectivity, stability, and lifespan. By adjusting reaction conditions—including temperature, pressure, gas composition, and flow rate—different industrial reaction environments can be simulated, enabling a comprehensive evaluation of the catalyst’s performance in real-world applications. The ester and alcohol preparation continuous flow synthesis system is primarily used for research on continuous flow synthesis processes. The system is designed with two reactors that can be switched between operations, allowing for the execution of various types of continuous flow reactions. It is mainly employed to evaluate and study process parameters, explore optimal operating conditions, and, through sampling, analysis, evaluation, and data processing, obtain data on product distribution and product properties. This facilitates the transition from batch to continuous reaction processes and provides foundational design data for pilot-scale and industrial-scale process development.

Fixed-Bed Heater

A fixed-bed heater is an experimental apparatus commonly used in fields such as chemical engineering, materials science, and energy research. It primarily consists of a furnace body, a heating system, a control system, an atmosphere control system, a reactor, and a product collection system. The furnace body is typically constructed from high‑temperature–resistant materials, such as stainless steel or special alloys, to withstand prolonged exposure to high temperatures and potential corrosive environments. Inside the furnace body is a fixed‑bed reactor, which is packed with catalysts or solid materials under investigation. The heating system is the core component of the fixed‑bed heater and can utilize electric heating, gas combustion, or other heat sources to supply thermal energy. Electric heating systems convert electrical energy into thermal energy via electric heating wires or heating elements, while gas combustion systems generate heat by burning natural gas, propane, or other fuels. The control system is responsible for regulating the temperature and atmosphere within the heater, ensuring that reactions proceed under optimal conditions. Temperature control is usually achieved using PID controllers in conjunction with temperature sensors such as thermocouples or RTDs. The atmosphere control system allows for precise adjustment of the gas composition and pressure inside the furnace, and may also include flow meters and gas analyzers to monitor gas flow rates and compositions. The product collection system is used to collect and analyze the products generated after the reaction. Depending on the nature of the reaction, this system may comprise components such as condensers, separators, and gas scrubbing bottles. The design and operation of a fixed‑bed heater must take into account factors such as the reaction’s thermodynamic characteristics, the stability of the catalyst, the properties of the feedstock, and the desired purity of the target products. Proper design and operation can enhance experimental efficiency, optimize product yield and quality, while also ensuring the safety of the experimental process.

Carbon Dioxide Methane Steam Reforming Reaction – Micro Fixed Bed

Carbon Dioxide Methane Steam Reforming Reactor, Methane Steam Reforming Unit, High-Pressure Hydrogenation Fixed-Bed Catalyst Evaluation Unit, Methane Steam Reforming to Synthesis Gas Reactor, Fixed-Bed Catalyst Evaluation Microreactor. The high-pressure hydrogenation fixed-bed catalyst evaluation unit features a 310S reaction tube material, a design temperature of 1000°C, and a design pressure of 25 MPa. The bed is equipped with thermocouples for temperature measurement and includes temperature interlock protection. The product stream is designed with a fresh sample collection module and an automatic liquid discharge module; during automatic liquid discharge, pressure compensation is automatically implemented to prevent fluctuations in the reaction system pressure.

Fixed bed

A fixed-bed reactor is a chemical reaction apparatus in which solid catalysts are immobilized within the reactor in the form of a bed, while reactants—whether gaseous or liquid—flow through this catalyst bed and undergo chemical reactions. This reactor design is suitable for both continuous and batch operations and is widely used in fields such as petroleum refining, chemical production, and environmental engineering. The advantages of fixed-bed reactors include simple construction, stable operation, and ease of control; however, they also face challenges such as high pressure drop, limited catalyst life, and constraints on heat transfer. To address these challenges, engineers optimize reactor design, catalyst formulations, and operating conditions to enhance reaction efficiency and product quality.

Synthetic Ammonia Fixed-Bed Reactor

The fixed-bed reactor for ammonia synthesis is an industrial device used to produce ammonia, in which the catalyst is arranged in a fixed bed. This process is based on the Haber–Bosch process, a chemical reaction that converts nitrogen (N₂) and hydrogen (H₂) into ammonia (NH₃) under high temperature, high pressure, and in the presence of a catalyst. Fixed-bed reactors are widely employed in industrial ammonia production due to their simple structure and stable operation. However, these reactors have certain drawbacks, including significant pressure drop across the catalyst bed and the gradual decline in catalyst activity, which necessitates periodic replacement.