Oxygen Bomb Calorimeter
Test Parameters
Calorific Value
Applicable Fields
Coal, Metallurgy, Construction, Petrochemical
Description
Features
Specifications
Applications
Videos
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Q&A
Description
The Oxygen Bomb Calorimeter is a precision instrument used to measure the calorific value of substances during combustion. It is widely applied in the fields of energy, food, chemistry, and environmental research. The device determines the heat value of a sample by measuring the heat released when it undergoes complete combustion in a high-pressure oxygen environment.
Sample Requirements
- The sample must be dry and free of volatile substances, suitable for standard oxygen combustion experiments.
- The sample weight should be controlled between 0.5 to 1 gram, with a calorific value ≤ 34,000 J.
Precautions
- Ensure that the oxygen bomb calorimeter operates within a safe pressure range to avoid overpressure operation.
- Before conducting the experiment, check the equipment for oxygen leaks or any signs of damage.
- After use, make sure all components are thoroughly cleaned to prevent contamination and operational failures.
Ordering Guide
- Model Selection: Currently, only the ATC 300A model is available.
- Accessory Requirements: Choose additional accessories based on application needs, such as Hastelloy oxygen bombs, pellet presses, etc.
- After-Sales Service: Confirm after-sales service and technical support to ensure proper operation of the equipment.
Dimensions
- Equipment Size: 700mm × 550mm × 600mm
- Capacity: Standard oxygen bomb design, suitable for various sample volumes.
Automatic Ignition
- Automatic Ignition System: Ensures that samples ignite automatically in an oxygen environment, eliminating errors and risks associated with manual ignition.
Oxygen Filling System
- High-Pressure Oxygen System: Uses high-purity oxygen to ensure complete combustion of the sample in a sealed oxygen bomb, providing accurate calorific value data.
Constant Temperature Operation Mode
- Temperature Control: The system maintains constant temperature and pressure conditions, ensuring consistent experimental conditions to improve data accuracy and reliability.
Features
Ensures efficient and convenient operation with automated functions: oxygen bomb lifting/identification, oxygen charging/decompression, charging pressure detection, bomb leak testing, precise inner vessel water measurement, and automatic water filling/draining for inner and outer vessels.
Features a semiconductor-based refrigeration water circulation system with a high-precision filter, enabling real-time water temperature monitoring, rapid adjustment, and effective isolation from ambient interference.
Intelligently diagnoses ignition wire status and provides short-circuit protection for the ignition circuit.
Dynamically displays data curves on a color touchscreen for intuitive visualization of the testing process.
Automatically corrects for calorific value interference from ignition wires, nitric acid, sulfur, etc., providing gross, net, and bomb calorific values with unit conversion support.
Automatically generates graphs and process data, storing them locally with historical data query capability.
Standards: GB 384, GB/T 213, GB/T 30727, GB/T 21614, GB/T 14402, ASTM D5865, ASTM D240, ASTM D4809, ASTM D5468, ASTM E711, ISO 1928
Specifications
| Operating Environment | 15–30℃, ＜80%RH |
| Ignition Method | Cotton Thread or Ignition Wire |
| Test Mode | Isoperibol |
| Test Time | Conventional Method＜18min, Rapid Method＜10min |
| Calorific Value Testing Range | ≤34,000 J |
| Calorific Value Accuracy | ±50 J (with benzoic acid) |
| Heat Capacity Precision | ≤0.1% |
| Heat Capacity Stability | ≤0.2% (within one year) |
| Maximum Oxygen Bomb Pressure | 300 bar |
| Bomb Material | Stainless Steel, Hastelloy (corrosion-resistant) |
| Stirrer Maximum Rotation Speed | 600 rpm |
Applications
Videos
Product Operation
Oxygen Bomb Calorimeter
ATC 300A
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Q&A
What is the purpose of an oxygen bomb calorimeter?
An oxygen bomb calorimeter is a testing instrument used to measure the combustion heat of a sample. It determines the calorific value (energy content) of fuels, food, chemicals, and other materials by measuring the heat released during combustion.
How does an oxygen bomb calorimeter work?
The automatic oxygen bomb calorimeter ATC 300A mainly consists of an oxygen bomb, an inner cylinder, an outer cylinder, a stirrer, a thermometer, and an ignition device. The instrument works by filling the inner and outer cylinders with water and placing a certain amount of combustible material inside a sealed bomb (oxygen bomb) filled with high-pressure pure oxygen for complete combustion. The heat released from combustion is transferred through the oxygen bomb to the water in the inner and outer cylinders. By measuring the change in water temperature, the calorific value of the combustible material is calculated.
What types of materials can be tested with an oxygen bomb calorimeter?
It can test various solid and liquid samples, such as coal, petroleum, food, biomass, chemicals, and waste materials, to determine their calorific value. Depending on the material type, different sample containers or combustion aids may be required.
What are the main features of the oxygen bomb calorimeter?
Equipped with automatic oxygen bomb lifting, automatic oxygen bomb identification, automatic ignition, automatic oxygen filling and venting, automatic quantitative inner cylinder water control, and automatic inner and outer cylinder water filling and drainage, achieving high-precision and highly efficient automated operation.
• Unique ignition wire detection technology intelligently recognizes the ignition wire status, ensuring the experiment runs smoothly. Additionally, the short-circuit protection mechanism for the ignition circuit ensures experimental safety.
• Utilizes a semiconductor cooling water circulation system, which monitors and adjusts water temperature in real time, achieving an outer cylinder temperature control accuracy of ±0.03°C. Compared to traditional external thermostatic water tanks, it occupies less space, consumes less power, and provides more accurate heat capacity.
• Automatically corrects ignition wire combustion heat value, offering calibration calculations for high and low calorific values. Additionally, the instrument supports external printer interfaces, automatic data input from analytical balances, historical record queries, and other auxiliary functions.
What models of oxygen bomb calorimeters are available?
Currently, we offer the ATC 300A model. However, we can provide customized instruments based on your requirements to meet the calorific value testing needs of energetic materials and other special samples.
What are the operating steps for an oxygen bomb calorimeter?
Step 1: Weigh the sample – Clean and dry the oxygen bomb and crucible in advance, then use an analytical balance to weigh the sample.
Step 2: Connect the ignition wire/ignition cotton – Place the sample in the crucible and connect the ignition wire or ignition cotton.
Step 3: Install and secure the oxygen bomb – Inject 10 mL of distilled water into the oxygen bomb and tighten the oxygen bomb cover. After RFID automatically identifies the oxygen bomb, place it at the charging port.
Step 4: Set parameters – Enter the experiment name, sample name, and sample mass on the touchscreen, then click the “Start” button. The ATC 300A will automatically conduct the experiment.
Step 5: End of experiment – Once the experiment is complete, the operator confirms the experimental results, removes the oxygen bomb, and cleans and dries it.
What is the temperature range of the oxygen bomb calorimeter?
The working temperature range of the oxygen bomb calorimeter is 15°C to 30°C to ensure accurate measurement. The actual combustion temperature inside the oxygen bomb can reach up to 2000°C, depending on the type of fuel.
How often should the oxygen bomb calorimeter be calibrated?
• The validity period for heat capacity calibration is three months, but recalibration should be performed immediately in the following situations:
The calorimeter has been significantly moved during normal use.
Major components of the oxygen bomb have been replaced, such as the bomb cover or connection ring.
The thermometer of the calorimeter has been replaced.
When measuring calorific value, the actual water temperature in the inner cylinder differs by more than 5°C from the average inner cylinder water temperature during heat capacity calibration.
The calorimeter has undergone major repairs and has been completely refilled with water.
How should the oxygen bomb calorimeter be maintained daily?
(1) Before starting each experiment, check whether the water level is within the upper and lower limits.
(2) Ensure that the oxygen bomb cover is tightly secured to prevent it from popping open during charging.
(3) After each experiment, ensure that the sample chamber is clean and remove any residual sample material promptly.
(4) When the instrument is not in use, make sure to turn off the power.
