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Mahdi
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PENGARUH RASIO REAKTAN PADA IMPREGNASI DAN SUHU REDUKSI TERHADAP KARAKTER KATALIS KOBALT/ZEOLIT ALAM AKTIF Tri Kurnia Dewi; Mahdi; Teguh Novriyansyah
Jurnal Teknik Kimia Vol 22 No 3 (2016): Jurnal Teknik Kimia
Publisher : Chemical Engineering Department, Faculty of Engineering, Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Pada proses reaksi kimia seperti hidrogenasi, cracking maupun hydrocracking, dibutuhkan katalis perengkah yang merupakan katalis heterogen. Salah satu jenis katalis heterogen adalah katalis logam-pengemban, yang terdiri dari logam yang diembankan pada bahan pengemban padat seperti zeolit alam aktif. Pada penelitian ini, dilakukan pengembanan katalis logam kobalt ke dalam zeolit alam aktif melalui metode impregnasi. Variabel yang diteliti pada penelitian ini adalah rasio berat reaktan (Co dan zeolit alam aktif) pada impregnasi katalis dengan variasi 2:20; 3:20; 4:20; 5:20 dan 6:20 serta suhu reduksi dengan variasi 250oC; 300oC; 350oC; 400oC dan 450oC. Produk katalis Co/ZAA dianalisa tingkat keasamannya dengan cara adsorpsi amoniadan piridin. Luas permukaan katalis Co/ZAA dianalisa menggunakan Surface Area Analyzer dengan metode BET. Hasil penelitian menunjukkan bahwa semakin besar rasio berat reaktan kobalt/zeolit alam aktif maka semakin besar pula keasaman dan luas permukaan katalis yang terbentuk. Keasaman dan luas permukaan katalis Co/ZAA juga mengalami kenaikan seiring dengan kenaikan suhu reduksi. Keasaman katalis terbesar pada penelitian ini adalah pada rasio reaktan Co/ZAA 6:20 dan pada suhu reduksi 450 oC yaitu masing-masing 6,4615 mol/g dan 7,5202 mol/g (keasaman dengan adsorbat amonia), 2,6047 mol/g dan 3,6662 mol/g (keasaman dengan adsorbat piridin). Luas permukaan katalis terbesar pada penelitian ini adalah pada rasio berat reaktan Co/ZAA 6:20 yaitu 32,63 m2/g dan pada suhu reduksi 450 oC yaitu 38,95 m2/g.
Pengaruh Laju Pertumbuhan Penduduk, Dependency Ratio Dan Tingkat Pendidikan Terhadap Pertumbuhan Ekonomi di Kota Langsa Radesi Bariaty; Nurlaila Hanum; Miswar; Manovri Yeni; Mahdi
Jurnal Sociohumaniora Kodepena (JSK) Vol. 3 No. 2 (2022): Jurnal Sosiohumaniora Kodepena
Publisher : Kodepena Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54423/jsk.v3i2.112

Abstract

This study aims to determine the effect of population growth rate, dependency ratio and education level on economic growth in Langsa City in 2006-2021. The method of data collection in this research is done through a literature study, the data analysis method used is quantitative analysis using multiple linear regression analysis using the E-Views version 10. The results obtained by the equation Y = – 11.85942 – 0.322561 X1 + 0.284660 X2 + 0.195014 X3, based on the t-test the population growth rate has a negative and insignificant effect, the dependency ratio has a positive and significant effect and the level of education has a positive and insignificant effect on economic growth in Langsa City. Simultaneously the rate of population growth, dependency ratio and level of education have no significant effect on economic growth in Langsa City.
Analisis Alokasi Dana Desa (ADD) dan Kebijakan Desa Terhadap Tingkat Kesejahteraan Masyarakat Di Desa Narigunung Febrio Kadanta Sembiring; Yani Rizal; Iskandar; Radhiana; Mahdi; Zahrul Fuadi; Anwar Anwar; Cut Nya Dhin
Jurnal Sociohumaniora Kodepena (JSK) Vol. 4 No. 1 (2023): Jurnal Sosiohumaniora Kodepena
Publisher : Kodepena Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54423/jsk.v4i1.130

Abstract

This study aims to determine the effect of village fund allocation and village policy on the level of community welfare in Narigunung Village 1. The method used is a quantitative method using the help of Eviews 12. The population in this study was 549 people in Narigunung 1 Village, and the sample in this study amounted to 80 respondents with Non-probability sampling techniques using purposive sampling. Data collection methods by distributing questionnaires and by using validity tests and reliability tests. The data analysis methods used in this study are multiple linear regression analysis, t test, F test, and determination coefficient test. Based on the results of multiple linear regression analysis, the equation Y = 3.422786 + 0.763682X 1 + 0.141002X 2 is obtained, meaning that the constant is 3.422786 which means if X 1 (village fund allocation) and X 2 (village policy) value is 0, then Y (community welfare) value is 3.422786, while X 1 (village fund allocation) with a result of 0.763682 which means that every increase X 1 1% will increase Y by 0.763682% assuming the other variables are constant, and vice versa. and X 2 (village policy) by 0.141002 which means that every increase in X 2 by 1% will increase Y by 0.141002% assuming the other variables are constant, and vice versa. The results of the t (partial) test for X 1 (village fund allocation) obtained a t sig value of 0.0000 < 0.05 which means a positive and significant effect on Y (community welfare) while for X 2 (village policy) a t sig value of 0.0286 < 0.05 was obtained which means a positive and significant effect on Y (community welfare). The results of the F (simultaneous) test are known to have an Fsig value of 0.000000 < 0.05 which means that X 1 (village fund allocation) and X2 (village policy) simultaneously have a significant effect on Y (community welfare). The result of the coefficient of determination obtained R2 (R Square) of 0.731678 or (73.17%), while the remaining 26.83% was influenced or explained by other variables that were not included in this research model
Co-Authors Anwar Anwar Cut Nya Dhin Febrio Kadanta Sembiring ISKANDAR Manovri Yeni Miswar Nurlaila Hanum Radesi Bariaty RADHIANA Teguh Novriyansyah Tri Kurnia Dewi Yani Rizal Zahrul Fuadi