Saputra, Hildhan Reicky (2026) Pabrik Asam Nitrat dari Ammonia dan Oksigen melalui Proses Dupont Oxidation dengan Katalis Platinum-Rhodium Kapasitas. Undergraduate thesis, UPN Veteran Jawa Timur.
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Abstract
Nitric acid (HNO₃) is an inorganic chemical that plays a vital role across various industrial sectors, serving primarily as a raw material for the production of nitrogen fertilizers, explosives, nitro compounds, and metallurgical products, among other chemical goods. The expanding chemical industry in Indonesia has driven a steady annual increase in the demand for nitric acid; however, domestic production capacity remains insufficient to meet this demand, necessitating continued reliance on imports. Consequently, establishing a nitric acid plant in Indonesia presents a promising opportunity to satisfy domestic needs, reduce import dependency, and bolster the growth of the national chemical industry. The plant is scheduled to commence operations in 2030 with an annual production capacity of 60,000 tons, located in Bungah District, Gresik Regency, East Java. It will operate continuously for 330 days per year, employing a workforce of 185 people. Nitric acid production will utilize the DuPont Oxidation Process (Monopressure Process), employing ammonia and oxygen as primary raw materials and a platinum-rhodium (Pt-Rh) catalyst in the form of a gauze mesh. Liquid ammonia is first vaporized, while oxygen is compressed to the required operating pressure. Both reactants are then heated and mixed before being fed into the furnace to reach the reaction temperature. The gas mixture is subsequently fed into a multitube fixed-bed oxidation reactor operating at 700°C and 8 atm. Inside the reactor, ammonia undergoes oxidation to form nitrogen monoxide (NO) and water vapor, achieving a conversion rate of 95%. Heat generated by the reaction is recovered via a waste heat boiler to produce superheated steam, thereby enhancing energy efficiency. The gas resulting from the subsequent reaction is separated from air condensate before being fed into the oxidation chamber to oxidize nitrogen monoxide into nitrogen dioxide (NO₂). The NO₂ gas is then absorbed using air within the absorber, yielding a nitric acid solution with a concentration of approximately 68%. The product solution subsequently undergoes depressurization and cooling to 30°C, after which it is held in a storage tank as the final product prior to marketing.
| Item Type: | Thesis (Undergraduate) | ||||||||
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| Subjects: | T Technology > TP Chemical technology > TP155 Chemical engineering | ||||||||
| Divisions: | Faculty of Engineering > Departement of Chemical Engineering | ||||||||
| Depositing User: | hildhan Reicky Saputra | ||||||||
| Date Deposited: | 23 Jul 2026 08:33 | ||||||||
| Last Modified: | 23 Jul 2026 08:33 | ||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/57889 |
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