Zobrazeno 1 - 10
of 46
pro vyhledávání: '"Rosdanelli Hasibuan"'
Publikováno v:
Case Studies in Chemical and Environmental Engineering, Vol 9, Iss , Pp 100543- (2024)
In this study, silica derived from palm leaf ash impregnated with various alkali sodium and potassium hydroxide to obtain sodium and potassium silicate was calcined, prepared, and employed as a solid base catalyst for the conversion of oils to biodie
Externí odkaz:
https://doaj.org/article/e5140a4b78b74a349b0c42f9d4ab30bc
Publikováno v:
Agrointek, Vol 17, Iss 3, Pp 577-588 (2023)
Coconut shell waste has generated environmental problems in Indonesia. Due to fossil fuel shortage, coconut shell waste has been advantaged as an energy source to replace the fossil energy. A pyrolysis technique has been used to crack coconut shell w
Externí odkaz:
https://doaj.org/article/c99ce76c6f204b6d962ea08e24fabeeb
Publikováno v:
Case Studies in Thermal Engineering, Vol 45, Iss , Pp 102936- (2023)
This recent study evaluated a hybrid solar-assisted heat pump dryer (HS-AHPD) for drying paddy and its product quality. R22 is used as a working fluid in the heat pump system during the drying experiment. The HS-AHPD decreased the paddy's weight from
Externí odkaz:
https://doaj.org/article/6ce475cded4945fda0063531de0e74d8
Publikováno v:
Agrointek, Vol 15, Iss 4, Pp 1128-1141 (2021)
Limonene in essential oils is highly valuable attracts great interest of consumers due to its specific fragrance. It is not surprising that many big perfume industries are looking for high purified limonene found in essential oils of certain fruits a
Externí odkaz:
https://doaj.org/article/ea3eb09137d9417bb3bde233079d62ea
Autor:
Renita Manurung, Rosdanelli Hasibuan, Fatimah Batubara, Handy Inarto, Alwi Gery Agustan Siregar, Auryn Saputra
Publikováno v:
Indonesian Journal of Chemistry, Vol 21, Iss 5, Pp 1111-1119 (2021)
In Indonesia, the composition of waste has gradually changed over time. To reduce expanded polystyrene (EPS) foam waste, we converted it into a heterogeneous acid catalyst, namely Polystyrene Sulfonic Acid (PSSA). The catalyst was then used in an est
Externí odkaz:
https://doaj.org/article/704af261f0914a839dcd128fc404db27
Autor:
Muhammad Khairul Afdhol, Tomi Erfando, Fiki Hidayat, Rosdanelli Hasibuan, M Yuda Hasibuan, Chalidah Pratiwi Siregar
Publikováno v:
Journal of Earth Energy Engineering, Vol 9, Iss 2, Pp 102-111 (2020)
Wax paraffin deposition is a problem faced in the pipeline for petroleum industries that they blockage the partial or full inside the pipe, which will decrease the production rate. One of the treatments is to use the preventive methods called wax inh
Externí odkaz:
https://doaj.org/article/140796b128d7427996ed629e14f05850
Publikováno v:
Jurnal Teknik Kimia USU. 12:46-53
The increased production of coconut has increased by the shell produced, even though this coconut shell has lignin content of 33.30% so it has the potential to be converted into charcoal through the pyrolysis process. Pyrolysis is a thermal decomposi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::13f38f4834f804188212c9b7d5c7dd33
https://doi.org/10.32734/jtk.v12i1.8534
https://doi.org/10.32734/jtk.v12i1.8534
Publikováno v:
Jurnal Teknik Kimia USU. 12:1-8
Biobriquette is a solid fuel derived from raw materials that can be renewed continuously because it is made from a mixture of biomass such as wood, twigs, leaves, grass, straw and other agricultural wastes. The research aims to examine the effect of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9c3c6749b0fde5efe29543c12f87adb5
https://doi.org/10.32734/jtk.v12i1.9818
https://doi.org/10.32734/jtk.v12i1.9818
Publikováno v:
Jurnal Teknik Kimia USU. 12:18-23
Kepok banana bunches were used as a source of natural alkali in the study of determining the ratio of coconut oil and palm oil in the saponification process using banana bunch ash. Alkali is obtained from the calcination process with variations in te
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a82c3e7df1600b4887dea164ce0672a6
https://doi.org/10.32734/jtk.v12i1.5383
https://doi.org/10.32734/jtk.v12i1.5383
Publikováno v:
Mathematical Modelling of Engineering Problems. 10:334-339
Rice is the main food in Indonesia. Rice drying by using the traditional method directly under the sun light can require a long time to complete. The aim of this study is to investigate the appropriate kinetics modeling of rice with applied by fluidi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6cb12a99a0de0f82e27cd482e3a94fee
https://doi.org/10.18280/mmep.100138
https://doi.org/10.18280/mmep.100138