This book tackles with originality of H2S , Problems and scavenging. the scavenging process is the main object of the production problem companies during all petroleum processes. So that this book discuss the significant dangers and operating problems posed by H2S and creates a better understanding of available mitigation options as well as how those options can be tailored to meet particular needs. Proper treatment of H2S with an appropriate H2S scavenger will improve safety, environmental compliance, product quality and process integrity management.