Question

write a chemical equations to represent controlled oxidation of methane .(class 11)​

Answer 1

Answer:

step by step explanation

Explanation:

Synopsis

Copper-exchanged zeolites (e.g., MFI, MOR, and CHA) catalyze the direct oxidation of methane into methanol in the gas phase, at low temperature, and using only molecular oxygen and water.

To date, no man-made catalyst can convert methane (CH4) and oxygen (O2) directly into methanol (CH3OH) at low temperature. For more than 100 years, the selective oxidation of this simple alkane has remained unsolved. This transformation, however, is essential to exploit our highly abundant natural gas reserves, particularly those located in distributed fields or stranded wells that cannot be accessed with large, capital-intensive reforming facilities. Although oxidative C–H bond activation of CH4 is thermodynamically and kinetically accessible at low temperatures, the large bond dissociation energy (435 kJ mol–1) of this molecule hinders C–H cleavage reactions via homolytic or heterolytic pathways. Consequently, few catalysts are capable of preventing overoxidation to carbon dioxide (CO2). Several alternative strategies for activating methane have been reported, including multistep oxyfunctionalization with Periana catalysts,(1, 2) borylation,(3) and electrophilic carbene insertion,(4, 5) but all have fallen short of producing methanol directly and do not use oxygen as the oxidizing agent. In contrast, methane monooxygenase enzymes are capable of oxidizing CH4 selectively into CH3OH using O2 at room temperature.(6-8) While such biocatalysts are difficult to scale-up, the nature of their active sites provides inspiration for the development of synthetic oxidation catalysts.