PABRIK UREA DARI AMMONIA DAN KARBONDIOKSIDA DENGAN PROSES SNAMPROGETTI

Safitri, Annisa Nur (2024) PABRIK UREA DARI AMMONIA DAN KARBONDIOKSIDA DENGAN PROSES SNAMPROGETTI. Undergraduate thesis, UPN Veteran Jawa Timur.

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Abstract

The urea plant, using the Snamprogetti process with a capacity of 350,000 tons per year, is planned to be established in Banggai Regency, Central Sulawesi. Urea is used as a plant fertilizer because it contains nitrogen, which is essential for plant growth. It is also used as a livestock feed supplement, in the production of various types of plastics, soap, melamine, various medicines, adhesives, and explosives. In the chemical industry, urea is also an important reagent and a raw material for the production of other chemical compounds. This plant will operate for 330 days a year. The urea production process begins by reacting 99.5% ammonia and 99% carbon dioxide in a reactor. The reaction conversion reaches 80%. The products formed in the reactor, namely urea, water, and residual ammonia, are then fed into a stripper to recover unreacted ammonia and carbon dioxide for reuse as reactants and to decompose carbamate. The urea liquid is then fed into the Medium Pressure Decomposer (MP Decomposer) to decompose ammonium carbamate into carbon dioxide and ammonium, which are fed into a scrubber. It is then followed by lower-pressure purification to decompose any remaining carbamate. Next, the urea is concentrated to 98% by weight, which is required to produce prills, in an evaporator. After concentration, the granulation process uses a prilling tower to form concentrated urea into prills, with the help of air blown from below the prilling tower. This produces urea with a purity of 98.5%, the main product of the plant. The decomposition and evaporation gases from the stripper, MP decomposer, and LP decomposer are then directed to a scrubber to absorb ammonia from the gas mixture using water as a solvent. After absorption, the mixture is fed into a vaporizer to evaporate the ammonia and recycle it back into the reactor.

Item Type:	Thesis (Undergraduate)
Contributors:	Contribution Contributors NIDN/NIDK Email UNSPECIFIED Wahyusi, Kindriari Nurma NIDN0728026002 kindriarinurma@gmail.com
Subjects:	T Technology > TP Chemical technology > TP155 Chemical engineering
Divisions:	Faculty of Engineering > Departement of Chemical Engineering
Depositing User:	Unnamed user with email 20031010070@student.upnjatim.ac.id
Date Deposited:	17 Sep 2024 06:44
Last Modified:	17 Sep 2024 06:44
URI:	https://repository.upnjatim.ac.id/id/eprint/29227

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