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All Journal Agroindustrial Technology Journal CHEESA: Chemical Engineering Research Articles Jurnal Teknik Kimia
Rahmatullah Rahmatullah
Jurusan Teknik Kimia Fakultas Teknik Universitas Sriwijaya
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Engineering Industrial & Manufacturing Engineering

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Journal : CHEESA: Chemical Engineering Research Articles

 1 
The Effect of H-Factor on Kappa Number and Viscosity in Continuous Digester Putri, Rizka Wulandari; Rahmatullah, Rahmatullah; Siagian, Faisal
CHEESA: Chemical Engineering Research Articles Vol. 6 No. 1 (2023)
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v6i1.15681.26-33

Abstract

One of the most important steps in pulping is the cooking process, which serves to separate the cellulose and hemicellulose from lignin and other by-products. During the cooking process in the digester, various factors must be considered to create high-quality pulp. Among these factors, the H-Factor plays a significant role due to its impact on the kappa number and viscosity in the pulping process. A high H-Factor can also damage the strength of the pulp. Therefore, this research aims to investigate the effect of the H-Factor and active alkali on pulp yield and quality. The active alkali used was in line with the desired production objectives, as insufficient levels of active alkali can lead to a low yield of pulp. Meanwhile, pulp quality standards in the Pulp and Paper Industry included kappa number of 12-18 in the digester process, an approximate viscosity of 23 mPa.s, and the selection of H-Factor based on the desired production target.
Catalyst Lifetime Analysis for High-Temperature Shift Converter (104-D1) at Urea Factory Rahmatullah, Rahmatullah; Putri, Rizka Wulandari; Mahendra, Bobi; Arofi, Hegar Tifal; Hadi, Cecep Sumiratna
CHEESA: Chemical Engineering Research Articles Vol. 6 No. 2 (2023)
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v6i2.15986.76-84

Abstract

High Temperature Shift (HTS) Converter (104-D1) have a function to convert CO gas into CO2 in the ammonia unit. The presence of CO could be poisoning the catalyst in the ammonia converter. The performance of HTS (104-D1) was ideal if the percentage of CO outlet is above 3.41 mol % dry basis. The performance of HTS (104-D) was influenced by operating conditions (pressure and temperature) and the ratio of steam to carbon. The increase in temperature in HTS (104-D1) can increase in the reaction rate and a decrease in CO conversion due to a decrease in catalyst performance. The research aims to find out how the performance of HTS (104-D1) after Turn Around process (catalyst replacement) that reviewed based on the operating conditions and the resulting CO conversion. The analysis was carried out by comparing the CO conversion from the actual data with the CO conversion from the design data by using the regression equation method to predict the lifetime of the catalyst. CO conversion obtained from the design data is 69.42 %. Conversion of actual data in June, July, August, September and October was 67.43 %; 78.32 %; 77.93 %; 77.75 %; and 77.40 %. The lifetime of the HTS catalyst (104-D1) PUSRI-IIB was estimated to be used up to 5 years after Turn Around process.
Co-Authors Adhe M. Rainadi Alek Al Hadi Alieftiyani P Gobel Arofi, Hegar Tifal Asyeni M. Jannah Ayu Permatasari Budi Santoso Enggal Nurisman Enggal Nurisman Fanirazha Primesa C Febriyanti Puspita Sari Hadi, Cecep Sumiratna Intan Retri Utari Linda Santia Mahendra, Bobi Muhammad Anwar Raihan Muhammad Y. Pratama Mutiara Aiko Habsyari Rizka W. Putri Rizka W. Putri Rizka Wulandari Putri Roosdiana Muin Selpiana . Shafira T Aliyah Siagian, Faisal Sri Haryati Yandriyani Yandriyani