Which outcome occurs when Zeolite catalyst active sites are exposed to high sulfur concentrations during hydrocarbon cracking?

💡 Explanation

When sulfur concentration is high, adsorption of sulfur compounds poisons active sites on the zeolite catalyst, increasing energy barrier for hydrocarbon molecule adsorption and subsequent cracking reactions. Therefore greater activation energy results, rather than decreased area, chain propagation or enhanced selectivity if catalysts sites weren't inhibited.

• Which risk significantly worsens when metallic shielding obstructs microwave communication?
• Which outcome occurs when impedance mismatching causes standing waves in transmission lines?
• Which risk increases when a GPS satellite's kinetic energy is minimised conserving altitude?
• Which outcome occurs when rapid oxide growth on a silicon carbide MOSFET gate?
• Which consequence results when exceeding the thermal limit in gallium-doped germanium?
• Which magnetic field consequence occurs when a superconducting toroidal transformer core exceeds its critical current?