What question did this study set out to answer?

To develop a process that integrates electrochemical nitrogen oxide reduction and selective catalytic reduction for efficient off-gas treatment.

Coupling Electrochemical NO Reduction with Selective Catalytic Reduction for Off-Gas Treatment Without External Reducing Agents

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Novel process combines electrochemical and catalytic reduction of NOx in industrial off-gas, suggesting improved efficiency.

To develop a process that integrates electrochemical nitrogen oxide reduction and selective catalytic reduction for efficient off-gas treatment.
Combined electrochemical nitrogen oxide reduction (NORR) with selective catalytic reduction (SCR)
Converted half of NOx to NH3 using NORR
Used produced NH3 to reduce the remaining NOx via SCR
Conducted techno-economic analysis of the new configuration
Reduced electricity consumption for NORR by approximately 50%
Eliminated the need for external reducing agents in SCR
The new configuration shows slightly higher costs than traditional SCR, with potential for future cost reductions.

Rix et al. (2026) studied this question.

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