Preliminary plant design of 60 / weight nitric acid using tubular membrane reactor capacity 22,000 tones/year

Santoso, Benny and Sobhana, Mario Ardianto and Wicaksono, M. C. Caroline and Praha, Devarly (2006) Preliminary plant design of 60 / weight nitric acid using tubular membrane reactor capacity 22,000 tones/year. Undergraduate thesis, Widya Mandala Catholic University Surabaya.

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Abstract

The defensive industry is oneof the mostimportant industries in Indonesia. One of them is explosive industry, which needs ammonium nitrate. Nitric acid is one of the strategic materials for defensive industry and also usedas an oxidizing agent and as a highly active acid for fertilizer, plastics, pharmaceuticals,dyes, synthetic fibers, insecticides,and fungicides. Nitric acid can be produced from weak acid processand concentrated acid process.Nitric acid in explosive industries only needs concentration about59o/oweights. Therefore, this preliminary plant doesn't have concentrated acid process,which can producenitric acid up to 100% concentration.Weak acid processwith singlepressureis usedin this preliminary plant. The pressurethat is used is a medium pressure (7 atm). The reason for choosing weak acid processis becauseit is suitable for small or mddium capacityplants(nitric acid that is producedwhich is less than 600 tones/day) Ammonia liquid is used as raw material in the making of nitric acid. The brief of description processis as follows; ammonia liquid as raw material is vapored using vaporizerthenpart ammoniavapor formed reactswith oxygen in the air and anotherpart reactswith tail gas forme.din the absorber.Reaction befween ammonia and oxygen occurs inside the membranereactorwith lanthanum perovskite catalyst. Then gas product flows to heat exchanger networ-ksystem and reaction between gas product from reactor with water form nitric acid is occurred all the way to heat exchanger network system. Nitric acid with 40% concentration is formed after partial condensationinside cooler condenser.This nitric acid then flows to the bottom ofabsorber to react and be absorbed with water to form nitric acid with 60% concentration all at once. Uncondensed vapor in cooler condenser then flows to the middle ofabsorber to be reacted and absorbed by H2O to form nitric acid with 60% concentration all at once. To reduce tailgasemissionthat is produced,tailgaswill be reacted with NH: inside SCR reactor to form Nz andOz. Thispreliminaryplantdesignhas following properties: Raw material NHr Raw material capacity 492.0658kg/hour Nitric acid capacity 2777 -78 kg/hour Purity 600/o Utility : . Water :75 m3lday . Electricity :44 kW ' Fuel :9.0874lb/hour Amount of employees I I I people Plantlocation Cikampek,WestJava. Land area 6400 m' Processarea 1600 m2 Building area 1354m2 vl Economicanalysis: 1. IRR Beforetax:41.09 %o Aftertar:24.48% 2. ROE Beforetax:52.81 %' Aftertax:32.74Yo 3. POT Beforetax: 2 yearsand7 months After tax: 3 yearsanda month 4. NPV : R,p.125,259.,394,761 .98 5. ROr :46.30% 6. BEP :30.796%

Item Type: Thesis (Undergraduate)
Subjects: Engineering
Engineering > Chemical Engineering
Divisions: Faculty of Engineering > Chemical Engineering Study Program
Depositing User: Users 32 not found.
Date Deposited: 26 Jun 2015 08:52
Last Modified: 26 Jun 2015 08:52
URI: http://repository.wima.ac.id/id/eprint/2924

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