This book focuses on the ammonia industry, a cornerstone of nitrogenous fertilizer production, and serves as a practical handbook for industry operators and consultants. Written from an operator's perspective, it covers optimization, economics, engineering, troubleshooting, safety, and environmental considerations. It also explores the theoretical aspects of catalysts, chemical reactions, equipment, process safety, and environmental impact to enhance operator confidence and ensure optimal plant performance. Specifically designed for ammonia plant operators, offering guidance on state-of-the-art standard operating procedures. Highlights carbon capture technologies in current ammonia plants and explores alternative pathways for green ammonia production. Provides practical insights into operational relevance and optimization strategies. Includes industrial applications and troubleshooting techniques. Reviews field-level safety practices. This book is intended for chemical engineering professionals working in chemical and ammonia production facilities.