Article Per Year (5 Year)
p-Index From 2021 - 2026
0
P-Index
This Author published in this journals
All Journal Wood Research Journal : Journal of Indonesian Wood Research Society Wood Research Journal : Journal of Indonesian Wood Research Society
Joko Sulistyo
Department of Forest Products Technology, Faculty of Forestry, Universitas Gadjah Mada, Jl. Agro No. 1, Bulaksumur, Yogyakarta, Indonesia
Agriculture, Biological Sciences & Forestry

Published : 4 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 4 Documents
Search

 1 
Study of Provenance and Site Variability on Calorific Value and Other Fuel Properties of Teak Stem Asri Prasaningtyas; Joko Sulistyo
Wood Research Journal Vol 5, No 1 (2014): Wood Research Journal
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/wrj.2014.5.1.23-28

Abstract

Currently  Perum Perhutani has  conducted  efforts  to  improve  the   productivity  of  teak  forest  by   provenance  trial. However, only a few  studies have so  far considered the  variation of these main  fuel  properties of wood under the  influence of external factors such as location and provenance. On the  other side, the  huge amount of waste was regularly generated from primary  and secondary  wood processings.  Therefore, in  this  research, the  calorific  value  and other fuel  properties  were investigated and related to provenance and growth site. This research used the  stem wood and bark of five provenances (1 to 5) of teaks that  were planted at  three sites  of Perhutani stand (Bojonegoro, Ngawi, Ciamis). The fuel  characterisctics of bark were only evaluated  at  Ciamis  site.  Compared  to  bark, wood generally had lower values  in  ash content, volatile  matter content, and density,  but  had higher values in fixed  carbon content, calorific  value, and Fuelwood Value Index levels. The caloric  values of  teak  wood and  bark were 4,191~4,520 cal/g  and 3,545~3,939 cal/g,  respectively.  Provenance and site interaction had significant effect to the ash content, density, and calorific value in wood. The samples from  Ciamis site (code Ft) had the  highest level  in  calorific  value. However, the  relation  between calorific  value and density  is  not  clear in  this experiment. With regard to bark, provenance 3 (Ft) showed the  best energy properties.
Characteristics of Carbon from Oil Palm Shell Activated by Low Concentration of Zinc Chloride Activator Joko Sulistyo; Purnama Darmadji; Sri Nugroho Marsoem
Wood Research Journal Vol 5, No 1 (2014): Wood Research Journal
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/wrj.2014.5.1.29-36

Abstract

Currently, a large amount of oil palm shell has been dumped as waste from  palm oil processing  in Indonesia.  Using  a low  concentration  of  zinc   chloride  (ZnCl2),  thermal treatment during  pre-carbonization  was applied  in  the  preparation  of activated carbon from  oil palm shells at various temperatures and reaction durations. This study, therefore, aims to investigate the   physical  and chemical  characteristics  of  activated  carbon  prepared.  Oil palm  shells  collected  from   a plantation  in Palembang were carbonized by  two methods, one-stage carbonization (at 300°C for 3 hours) and two-stage carbonization (at 300°C for 3 hours, then  at  600°C for an  hour)  before chemical activation using ZnCl2, at  a concentration of 10  and 15%wt. Activation of oil palm shell charcoal was conducted at  600,  700,  and 800°C and reaction times  of 60,  120,  and 180  minutes. The results showed two-stage carbonization, high  temperature, and prolonged reaction time is bound to increase burn-off as well  as methylene blue adsorption, and decrease the  yield and volatile matter content of  the  activated carbon prepared. Meanwhile, high  ZnCl2  concentration increased the  ash content and the  methylene blue adsorption. In addition, the  two-stage carbonization  had higher iodine  adsorption  compared to the  one-stage  carbonization.  The activated  carbon with  high  iodine (769.3 mg/g) and methylene blue adsorption (133.7 mL/g) levels was obtained by  two-stage carbonization using 15%wt ZnCl2 at a temperature and reaction time of 800°C and 180 minutes, respectively.
Study of Provenance and Site Variability on Calorific Value and Other Fuel Properties of Teak Stem Asri Prasaningtyas; Joko Sulistyo
Wood Research Journal Vol 5, No 1 (2014): Wood Research Journal
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/wrj.2014.5.1.23-28

Abstract

Currently  Perum Perhutani has  conducted  efforts  to  improve  the   productivity  of  teak  forest  by   provenance  trial. However, only a few  studies have so  far considered the  variation of these main  fuel  properties of wood under the  influence of external factors such as location and provenance. On the  other side, the  huge amount of waste was regularly generated from primary  and secondary  wood processings.  Therefore, in  this  research, the  calorific  value  and other fuel  properties  were investigated and related to provenance and growth site. This research used the  stem wood and bark of five provenances (1 to 5) of teaks that  were planted at  three sites  of Perhutani stand (Bojonegoro, Ngawi, Ciamis). The fuel  characterisctics of bark were only evaluated  at  Ciamis  site.  Compared  to  bark, wood generally had lower values  in  ash content, volatile  matter content, and density,  but  had higher values in fixed  carbon content, calorific  value, and Fuelwood Value Index levels. The caloric  values of  teak  wood and  bark were 4,191~4,520 cal/g  and 3,545~3,939 cal/g,  respectively.  Provenance and site interaction had significant effect to the ash content, density, and calorific value in wood. The samples from  Ciamis site (code Ft) had the  highest level  in  calorific  value. However, the  relation  between calorific  value and density  is  not  clear in  this experiment. With regard to bark, provenance 3 (Ft) showed the  best energy properties.
Characteristics of Carbon from Oil Palm Shell Activated by Low Concentration of Zinc Chloride Activator Joko Sulistyo; Purnama Darmadji; Sri Nugroho Marsoem
Wood Research Journal Vol 5, No 1 (2014): Wood Research Journal
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/wrj.2014.5.1.29-36

Abstract

Currently, a large amount of oil palm shell has been dumped as waste from  palm oil processing  in Indonesia.  Using  a low  concentration  of  zinc   chloride  (ZnCl2),  thermal treatment during  pre-carbonization  was applied  in  the  preparation  of activated carbon from  oil palm shells at various temperatures and reaction durations. This study, therefore, aims to investigate the   physical  and chemical  characteristics  of  activated  carbon  prepared.  Oil palm  shells  collected  from   a plantation  in Palembang were carbonized by  two methods, one-stage carbonization (at 300°C for 3 hours) and two-stage carbonization (at 300°C for 3 hours, then  at  600°C for an  hour)  before chemical activation using ZnCl2, at  a concentration of 10  and 15%wt. Activation of oil palm shell charcoal was conducted at  600,  700,  and 800°C and reaction times  of 60,  120,  and 180  minutes. The results showed two-stage carbonization, high  temperature, and prolonged reaction time is bound to increase burn-off as well  as methylene blue adsorption, and decrease the  yield and volatile matter content of  the  activated carbon prepared. Meanwhile, high  ZnCl2  concentration increased the  ash content and the  methylene blue adsorption. In addition, the  two-stage carbonization  had higher iodine  adsorption  compared to the  one-stage  carbonization.  The activated  carbon with  high  iodine (769.3 mg/g) and methylene blue adsorption (133.7 mL/g) levels was obtained by  two-stage carbonization using 15%wt ZnCl2 at a temperature and reaction time of 800°C and 180 minutes, respectively.
Co-Authors Asri Prasaningtyas Purnama Darmadji Sri Nugroho Marsoem