 Corresponding author: Jishnu Madabhushi, E-mail id- venkatajishnu1@gmail.com Department of Chemical Engineering, Thadomal Shahani Engineering College, Mumbai. Copyright © 2022 Author(s) retain the copyright of this article. This article is published under the terms of the Creative Commons Attribution Liscense 4.0. 3D printing in chemical engineering: A review Jishnu Madabhushi * , Aditya Kalamdani, Abhinav Tyagi and Nita Mehta Department of Chemical Engineering, Thadomal Shahani Engineering College, Mumbai, India. World Journal of Advanced Engineering Technology and Sciences, 2022, 07(01), 086–095 Publication history: Received on 29 August 2022; revised on 02 October 2022; accepted on 05 October 2022 Article DOI: https://doi.org/10.30574/wjaets.2022.7.1.0097 Abstract 3D printing, also known as additive manufacturing has become one of the most revolutionary and powerful tools serving as a technology of precise manufacturing of chemicals ranging from laboratory scale to large scale production. There is constant motivation towards designing new concepts of manufacturing with high efficiency. The introduction of 3D printing technology in the chemical industry has opened new horizons in the research and development of printed materials and equipment. One of the fields of technology, art, and science that is currently advancing the fastest is three- dimensional printing, and its uses are continually expanding. Three important elements play a big role in the rapidly expanding usage of 3D printing. First, as a result of lower raw material costs, increased competitive pressure, and technological developments, 3D printing is becoming increasingly affordable. Second, the rate at which materials can be printed is getting faster. Third, more types of materials can now be used with new 3D printers. A wide variety of polymers, resins, plasticizers, and other materials are being employed to make novel 3D products as a result of advancements in the chemical industry. In this review, we discuss the contribution of three-dimensional printing in the field of chemical engineering. Keywords: Microfluidics; Additive manufacturing; Fused deposition modelling; Electrodes; Active pharmaceutical ingredient 1 Introduction The field of 3D printing is constantly evolving in both academic and industrial research environments. The development of 3D printing technologies has opened up new possibilities for implementation in the field of rapid prototyping, instrumentation, dentistry, microfluidics, biomedical devices, tissue engineering, drug delivery, etc. Thanks to the huge reduction in costs and common commercial availability, 3D printing has become a cutting-edge technology with huge potential - also for teaching and applied chemistry. It opens up the possibility of printing custom-made reactors such as (micro) flow reactors. In addition, 3D printing technology can simplify chemical reactions such as heterogeneous catalysis, as reactants such as catalyst can be immobilized in the reactor by direct printing. Thus, chemical experiments can be printed and it is possible to quickly transform an idea into a process or a concept into an educational experiment as an elegant think-and-print approach [1]. The chemical industry will be both a provider of the new generation materials needed for 3D printing and a beneficiary of this process. The chemical sector has a huge opportunity to create unique consumables and generate new revenue streams with 3D printing. Using this technology, the concept is converted into a prototype using computer-aided design (CAD) files, enabling the production of digitally controlled, customized products. In this technology, layers of materials such as living cells, wood, alloy, plastic, metal, etc. are stacked on top of each other to form the required 3D object. Chemical synthesis is usually carried out in laboratories using expensive and complex equipment, which often hinders research progress. It is now viable to use 3D printing to produce reliable and durable miniature fluidic reactors as