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Related Concept Videos

Refrigerators and Heat Pumps01:07

Refrigerators and Heat Pumps

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Refrigerators or heat pumps are heat engines operating in a reverse direction. For a refrigerator, the focus is on removing heat from a specific area, whereas, for a heat pump, the focus is on dumping heat into one particular area. A refrigerator (or heat pump) absorbs heat Qc from the cold reservoir at Kelvin temperature Tc and discards heat Qh to the hot reservoir at Kelvin temperature Th, while work W is done on the engine’s working substance.
A household refrigerator removes heat from...
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Analyte Adsorption and Distribution01:09

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In certain chromatographic separations, solutes transfer between the mobile phase and the stationary phase via sorption, which typically refers to the process of adsorption. For many chromatographic systems, the sorption process often depends on the polarity of the compounds—an expression of the overall dipole moment within the molecule. During the separation process, there is competition between the solute and solvent for adsorption to the stationary phase. Highly polar compounds and...
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Nuclear Power02:36

Nuclear Power

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Controlled nuclear fission reactions are used to generate electricity. Any nuclear reactor that produces power via the fission of uranium or plutonium by bombardment with neutrons has six components: nuclear fuel consisting of fissionable material, a nuclear moderator, a neutron source, control rods, reactor coolant, and a shield and containment system.
Nuclear Fuels
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ATP Driven Pumps III: V-type Pumps01:30

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V-type pumps are ATP-driven pumps found in the vacuolar membranes of plants, yeast, endosomal and lysosomal membranes of animal cells, plasma membranes of a few specialized eukaryotic cells, and some prokaryotes. They are also known as the V1Vo-ATPase, that couple ATP hydrolysis to transport protons against a concentration gradient.
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ATP Driven Pumps II: P-type Pumps01:34

ATP Driven Pumps II: P-type Pumps

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The P-type pumps are a large family of integral membrane transporter ATPases. They are divided into five major types based on substrate specificity, from I to V.
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Quantifying Heat02:46

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Thermal Energy Microscopically, thermal energy is the kinetic energy associated with the random motion of atoms and molecules. Temperature is a quantitative measure of “hot” or “cold”, which depends on the amount of thermal energy. When the atoms and molecules in an object are moving or vibrating quickly, they have a higher average kinetic energy (KE) (or higher thermal energy), and the object is perceived as “hot”, or it is described as being at a higher temperature. When the...
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Related Experiment Video

Updated: Jan 22, 2026

Adsorption Device Based on a Langatate Crystal Microbalance for High Temperature High Pressure Gas Adsorption in Zeolite H-ZSM-5
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Adsorption Device Based on a Langatate Crystal Microbalance for High Temperature High Pressure Gas Adsorption in Zeolite H-ZSM-5

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High-Power Adsorption Heat Pumps Using Magnetically Aligned Zeolite Structures.

Jens Ammann1, Patrick Ruch1, Bruno Michel1

  • 1IBM Research-Zurich , 8803 Rüschlikon , Switzerland.

ACS Applied Materials & Interfaces
|June 29, 2019
PubMed
Summary

Researchers developed a novel zeolite coating for adsorption heat pumps, significantly boosting performance. This innovation promises more efficient, cost-effective, and eco-friendly heating and cooling solutions.

Keywords:
adsorption heat exchangeremulsion templatingheat pumpsmagnetic alignmentzeolites

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Adsorption Device Based on a Langatate Crystal Microbalance for High Temperature High Pressure Gas Adsorption in Zeolite H-ZSM-5
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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Thermodynamics

Background:

  • Adsorption heat pumps offer zero-emission heating and cooling using renewable heat sources and water as refrigerant.
  • Widespread adoption is hindered by low power density, large size, and high costs of current adsorption heat exchangers.
  • Improving heat and mass transfer within adsorbent materials is crucial for enhanced performance.

Purpose of the Study:

  • To develop an inexpensive and scalable method for fabricating high-performance zeolite coatings for adsorption heat pumps.
  • To enhance the power density and efficiency of adsorption heat exchangers through structured material design.
  • To enable next-generation adsorption heat pumps with improved performance and reduced cost.

Main Methods:

  • Fabrication of zeolite coatings using a bottom-up assembly of colloids directed by magnetic and capillary forces.
  • Utilizing an external magnetic field to chain oil droplets during coating deposition.
  • Formation of a percolating network of bridged zeolite particles upon drying to create vertically open channels and thermal bridges.

Main Results:

  • The architectured zeolite coatings demonstrated up to 3.3-fold higher performance compared to unstructured coatings.
  • The developed method is inexpensive, facile, and upscalable for potential industrial application.
  • The structured coatings facilitate directed mass and heat transport, crucial for efficient sorption cycles.

Conclusions:

  • The novel, inexpensive fabrication route for structured zeolite coatings significantly enhances adsorption heat pump performance.
  • This approach addresses key limitations of current adsorption heat exchangers, paving the way for more efficient and cost-effective systems.
  • The facile and upscalable method holds great potential for the advancement of sustainable heating and cooling technologies.