http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Udin Hasanudin (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
-
-
Torrefaction of Wood Pellets using Counter Flow Multi-Baffle (COMB) Technology
Wahyu Hidayat,Udin Hasanudin,Dewi Agustina Iryani,Agus Haryanto,Amrul,Sihyun Lee,Sangdo Kim 강원대학교 산림과학연구소 2018 강원대학교 산림과학연구소 학술대회 Vol.2018 No.09
Jabon (Anthocephalus cadamba) is a promosing fast growing wood species that is widely planted in community forests and industrial plantation forests but the wood has a relatively low density, durability, and mechanical properties which limited its application as structural timbers. One of the alternative utilizations of jabon wood is by converting into wood pellet for bioenergy. The aim of this study was to improve the properties of wood pellets from jabon through rapid torrefaction using Counter-Flow Multi Baffle (COMB) reactor, a pilot plant for torrefaction of biomass with a capacity of 20 kg/h that has a main advantage of performing torrefaction within a short period of time. Wood pellets were classified according to its length and then torrefied at 300°C with a residence time of 3 min. Torrefied pellets (black pellets) were succesfully produced. The initial moisture content of the long and short pellets of 12.76% and 12.47% decreased up to 2.85% and 2.61% after torrefaction. Water immersion test for 1 min, 5 min, 30 min, 1 h, 6 h, 12 h, and 24 h showed that the raw pellets (control) fully disintegrated after 30 min, while black pellets showed no significant disintegration even after 24 h test which is an advantage for long period storage of pellets. The initial calorific values of long and short pellets of 17.69 MJ/kg and 17.35 MJ/kg increased up to 31.79 MJ/kg and 32.02 MJ/kg after torrefaction. The results proposed that rapid torrefaction using COMB could provide a great improvement in bioenergetic properties of wood pellets from fast growing species as jabon wood.
-
Irma Thya Rani,Indra Gumay Febryano,Agus Haryanto,Udin Hasanudin,Dewi Agustina Iryani,Si-Hyun Lee,Wahyu Hidayat 강원대학교 산림과학연구소 2019 강원대학교 산림과학연구소 학술대회 Vol.2019 No.09
Oil palm (Elaeis guineensis) empty fruit bunches (EFB) is solid wastes derived from palm oil production which has not been utilized optimally, hence it is considered as a low economic value resource. This biomass resource can be converted into bioenergy through torrefaction process. Torrefaction is a mild pyrolysis at temperatures ranging between 200 and 300°C and it is generally performed under inert (non-oxidative) atmosphere. The aim of this paper was to compare non-oxidative and oxidative torrefaction processes applying to EFB pellets. Non-oxidative torrefaction was conducted by using a pilot plant namely Counter-Flow Multi Baffle Dryer/Pyrolizer (COMB) with a capacity of 20 kg/h. COMB is a multi-station high moisture flow baffle plate dryer for drying, torrefaction, and pyrolysis. COMB has simple, flexible and movable baffles that could perform drying or torrefaction within a short residence time of up to 5 min, with low gas to solid ratio, and constant temperature difference along the column. Torrefaction with COMB was conducted at 280°C with a residence time of 4 min. Oxidative torrefaction was conducted under air atmosphere in an electric furnace at 280°C with a residence time of 20 min. The results showed a decrease in the equilibrium moisture content (EMC) with a lower EMC observed in samples treated with oxidative torrefaction. The results also showed that torrefaction caused an improvement of hygroscopic property that could make biomass more stable against chemical oxidation and microbial degradation, hence self-heating and auto-ignition during storage could be prevented. The heating value of biomass increased after torrefaction. Non-oxidative torrefaction with COMB reactor resulted in a heating value of 17.90 MJ/kg, which is comparable with the results of oxidative torrefaction (with longer residence time) of 18.28 MJ/kg. The results proposed that torrefaction using COMB reactor could provide a great improvement in the quality of the bioenergetic properties of biomass that make torrefied biomass particularly suitable for cofiring in power plants and as a feedstock for gasification.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
