Can a multi zone rotating electric furnace be used for cracking experiments?

The multi temperature zone rotating electric furnace used in the experiment can be fully used for cracking experiments. Its core functions such as independent temperature control, rotation design, and atmosphere control in multiple temperature zones are highly compatible with the requirements of cracking experiments for temperature gradient, material uniformity, and reaction environment control. The specific analysis is as follows:

1. Multi zone independent temperature control: precise simulation of cracking temperature gradient
Cracking experiments usually require temperature control in stages to achieve gradual decomposition of materials. For example, plastic cracking requires first heating to 300-400 ℃ to soften the polymer, and then heating to 500-600 ℃ to complete the cracking reaction; Biomass pyrolysis requires removing moisture at 200-300 ℃, achieving pyrolysis at 400-500 ℃, and promoting gasification at 600-800 ℃.
The multi temperature zone rotary electric furnace can simultaneously set the temperature of different temperature zones (such as the high temperature zone of 800 ℃ in the front section, the medium temperature zone of 500 ℃ in the middle section, and the low temperature zone of 300 ℃ in the back section) through independent temperature control technology, forming a precise temperature gradient. This design has been validated in graphene synthesis: the carbon source is cracked in the high-temperature zone in the front, and the ordered growth is promoted in the low-temperature zone in the back, avoiding disorderly stacking and increasing the yield of single-layer MoS ₂.

2. Rotating design: improve the uniformity of cracking materials
In cracking experiments, uneven heating of materials can easily lead to local overheating or incomplete reactions. For example, if the temperature distribution is uneven during coal cracking, tar may be generated instead of the target synthesis gas; If the local temperature is too high during plastic cracking, coking will occur, reducing the purity of the product.
The rotating electric furnace rotates at a constant speed through the furnace tube, causing the material to continuously roll and fully contact with the heat source during the heating process. A certain university customized a rotary tube furnace to process ceramic powder at a speed of 5rpm, resulting in an increase in sintered body density and a decrease in porosity; In the experiment of plastic cracking to produce fuel oil, rotation prevents molten plastic from sticking to the furnace tube, reduces coking amount, and extends equipment maintenance cycle.

3. Atmosphere control: meet the requirements of the cracking reaction environment
Cracking reactions often require an inert or reducing atmosphere to prevent oxidation. For example, the cracking of metal organic framework materials (MOFs) needs to be carried out in an N ₂ or Ar atmosphere to avoid metal oxidation; When biomass cracking produces biogas, it is necessary to control the H ₂/CO ratio to optimize the product composition.
The multi temperature zone rotary electric furnace is equipped with gas inlet and outlet, mass flow meter and pressure gauge, which can be filled with gases such as nitrogen, argon, hydrogen, etc., and supports vacuum environment. In the preparation of negative electrode materials (Si/C composites) for lithium-ion batteries, Si particles are uniformly dispersed in the carbon matrix through rotational heat treatment under Ar atmosphere, resulting in improved initial charge and discharge efficiency and higher capacity retention.

4. Feasibility verification of typical application cases
Two dimensional material synthesis: A material laboratory customized a three temperature zone rotating tube furnace, which achieved an increase in the yield of single-layer MoS ₂ by using a high-temperature zone (800 ℃) to sulfide metal precursor in the front section, a medium temperature zone (500 ℃) to control the number of layers in the middle section, and a low-temperature zone (300 ℃) for annealing in the rear section.
Preparation of battery materials: A battery company customized a vacuum atmosphere rotary tube furnace, and through rotary heat treatment in Ar atmosphere, Si particles were uniformly dispersed in the carbon matrix, resulting in improved initial charge and discharge efficiency and higher capacity retention.
Semiconductor material growth: A chip manufacturer customized a high vacuum multi temperature zone tube furnace. By precisely controlling the ratio of NH3/N ₂ atmosphere and temperature gradient, the epitaxial layer dislocation density was reduced to 5 × 10 ⁶ cm ⁻ ², and the luminous efficiency of LED devices was improved.