Copper smeltersCopper smelter are tied to downstream sulfuric acid plantsSulfuric acid plant that treat tail SO2 gases before they are discharged into the atmosphere. If the acid plantAcid plant is not functioning properly and is unable to receive or adequately treat the SO2 off gases from the smelterSmelter, it can create a bottleneck that affects copper productionCopper production and poses severe threats to the smelterSmelter's profitability. When the acid plantAcid plant restricts smelterSmelter production, significant losses can occur: in some cases, the cost of a single day of production loss can easily exceed the amount spent on catalysts over many years. It is clear then that, in order to remain competitive in today's fast-paced and dynamic market landscape, copper smeltersCopper smelter cannot afford suboptimal operationOperation, extended downtimes, shorter-than-expected campaigns, or reduced rates in the acid plantAcid plant. The use of the right catalyst solutions and technical service has proven to help operators avoid these issues, ensure smooth operationOperation in their acid plantsAcid plant, and maximize smelterSmelter throughputThroughput. Examples of this include implementing the appropriate catalyst strategy to maximize the length of the campaign by mitigating pressure-drop build-up and ensuring a high enough conversion for extended cycles, as well as using the appropriate catalyst solution to increase hot standby times, thereby avoiding major shutdowns for frequent repairs or maintenance work. However, it is not only the right catalyst strategy that is important, but also the proper use of catalyst technical service. Using the unique capabilities of technical service to designDesign or optimizeOptimize catalyst loadings in transient conditions, which are the rule in copper smeltersCopper smelter, or being able to quickly identify heat exchanger leaksHeat exchanger leak that could limit plant performancePerformance are also key factors in ensuring proper operationOperation. In this paper, Topsoe will present real-life examples of how acid plantAcid plant operators from copper smeltersCopper smelter have already benefited from the right catalyst solutions and technical service to overcome their unique challenges.