Leon Kassner, Prof. Manfred Renner, Dr. Peter Fröhlich, Prof. Martin Bertau, Dr. Philip Biessey
{"title":"Utilization of Waste Materials Using the Müller–Kühne Process—A Life Cycle Inventory Study","authors":"Leon Kassner, Prof. Manfred Renner, Dr. Peter Fröhlich, Prof. Martin Bertau, Dr. Philip Biessey","doi":"10.1002/cite.70047","DOIUrl":"https://doi.org/10.1002/cite.70047","url":null,"abstract":"<p>The declining availability of sulfuric acid in Europe potentially creates a critical raw material gap. A possible solution to overcome this gap is the Müller–Kühne process (MKP), which converts gypsum waste into sulfuric acid and cement clinker, addressing both a disposal problem and, at the same time, enabling the utilization of complex waste materials for closed material cycles. Here we present a Life Cycle Inventory study of the MKP based on literature data and stoichiometric calculations. The MKP achieves a material yield of 85 %, outperforming conventional cement production, whereas its specific energy demand is higher at 7.45 GJ t<sup>−1</sup> of clinker. The inventory serves as a basis for a subsequent life cycle assessment.</p>","PeriodicalId":9912,"journal":{"name":"Chemie Ingenieur Technik","volume":"98 3","pages":"78-84"},"PeriodicalIF":1.6,"publicationDate":"2026-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cite.70047","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147568754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Abbaubar statt Abfall: Neue Kunststoffe für die Landwirtschaft","authors":"","doi":"10.1002/cite.70084","DOIUrl":"https://doi.org/10.1002/cite.70084","url":null,"abstract":"","PeriodicalId":9912,"journal":{"name":"Chemie Ingenieur Technik","volume":"98 3","pages":"67-68"},"PeriodicalIF":1.6,"publicationDate":"2026-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147567506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Leon Kassner, Prof. Manfred Renner, Dr. Peter Fröhlich, Prof. Martin Bertau, Dr. Philip Biessey
{"title":"Utilization of Waste Materials Using the Müller–Kühne Process—A Life Cycle Inventory Study","authors":"Leon Kassner, Prof. Manfred Renner, Dr. Peter Fröhlich, Prof. Martin Bertau, Dr. Philip Biessey","doi":"10.1002/cite.70047","DOIUrl":"https://doi.org/10.1002/cite.70047","url":null,"abstract":"<p>The declining availability of sulfuric acid in Europe potentially creates a critical raw material gap. A possible solution to overcome this gap is the Müller–Kühne process (MKP), which converts gypsum waste into sulfuric acid and cement clinker, addressing both a disposal problem and, at the same time, enabling the utilization of complex waste materials for closed material cycles. Here we present a Life Cycle Inventory study of the MKP based on literature data and stoichiometric calculations. The MKP achieves a material yield of 85 %, outperforming conventional cement production, whereas its specific energy demand is higher at 7.45 GJ t<sup>−1</sup> of clinker. The inventory serves as a basis for a subsequent life cycle assessment.</p>","PeriodicalId":9912,"journal":{"name":"Chemie Ingenieur Technik","volume":"98 3","pages":"78-84"},"PeriodicalIF":1.6,"publicationDate":"2026-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cite.70047","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147568755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nikolas Schmidt, Markus Labus, Prof. Dr. Peter Wasserscheid, Prof. Dr.-Ing. Stefan Will
{"title":"Uniform Gas Flow Distribution into Several Partial Flows under Consideration of Closable Outlets","authors":"Nikolas Schmidt, Markus Labus, Prof. Dr. Peter Wasserscheid, Prof. Dr.-Ing. Stefan Will","doi":"10.1002/cite.70053","DOIUrl":"https://doi.org/10.1002/cite.70053","url":null,"abstract":"<p>Achieving a uniform distribution of a gas flow into a specific number of partial flows poses a challenge in various fields and can be accomplished using static flow distributors. This task becomes more challenging if the number of active outlets can vary, meaning that individual outlets may be shut down. The presented concept of a flow distributor with four outlets solves the problem of maintaining uniform distribution to partial flows under different configurations of closed outlets. In a first step, the distributor is investigated numerically by performing 3D-Reynolds-averaged Navier–Stokes (RANS) simulations. The second step consists of an experimental investigation of the additively manufactured distributor using a two-axis displacement system and a pitot tube. For all investigated configurations of open outlets, the distributor evenly divides the inlet flow among the open outlets, regardless of the volumetric flow rate value.</p>","PeriodicalId":9912,"journal":{"name":"Chemie Ingenieur Technik","volume":"98 3","pages":"70-77"},"PeriodicalIF":1.6,"publicationDate":"2026-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cite.70053","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147565606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nikolas Schmidt, Markus Labus, Prof. Dr. Peter Wasserscheid, Prof. Dr.-Ing. Stefan Will
{"title":"Uniform Gas Flow Distribution into Several Partial Flows under Consideration of Closable Outlets","authors":"Nikolas Schmidt, Markus Labus, Prof. Dr. Peter Wasserscheid, Prof. Dr.-Ing. Stefan Will","doi":"10.1002/cite.70053","DOIUrl":"https://doi.org/10.1002/cite.70053","url":null,"abstract":"<p>Achieving a uniform distribution of a gas flow into a specific number of partial flows poses a challenge in various fields and can be accomplished using static flow distributors. This task becomes more challenging if the number of active outlets can vary, meaning that individual outlets may be shut down. The presented concept of a flow distributor with four outlets solves the problem of maintaining uniform distribution to partial flows under different configurations of closed outlets. In a first step, the distributor is investigated numerically by performing 3D-Reynolds-averaged Navier–Stokes (RANS) simulations. The second step consists of an experimental investigation of the additively manufactured distributor using a two-axis displacement system and a pitot tube. For all investigated configurations of open outlets, the distributor evenly divides the inlet flow among the open outlets, regardless of the volumetric flow rate value.</p>","PeriodicalId":9912,"journal":{"name":"Chemie Ingenieur Technik","volume":"98 3","pages":"70-77"},"PeriodicalIF":1.6,"publicationDate":"2026-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cite.70053","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147565367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}