Anhui Huainan Chemical N2O Abatement Project at Nitric Acid Plant Line4

Audit Analysis

A CDM N2O abatement project at a nitric acid plant with a VVB-confirmed combined additionality test and a measured project-specific baseline. The project significantly over-delivered relative to its pro-rata expectation (approximately 4.5×), indicating conservative crediting. Key gaps include the absence of a stated permanence mechanism, a contradictory leakage justification across monitoring reports, and missing CORSIA/CCP eligibility information.

Project Description

Red Flags

• ⚠Leakage justification is contradictory: the 2011 monitoring report states leakage was 'not addressed' while the 2012 report states it was 'deemed negligible' with a 0% deduction — the earlier gap raises questions about whether leakage was ever properly assessed
• ⚠Total ERR claimed differs between the two monitoring reports (78,997 in 2011 vs 149,352 in 2012), a near-doubling that is not explained in the extracted record
• ⚠Crediting period dates conflict between the validation report (2009-04-06 to 2016-04-05) and the 2012 monitoring report (2010-03-16 to 2017-03-15), creating ambiguity about the actual approved period
• ⚠No buffer pool, permanence mechanism, or reversal-risk mitigation is documented for a project whose abatement depends on continuous catalyst operation

Credit Vintages