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Pilot scale autothermal gasification of coconut shell with CO2-O2 mixture

Frontiers in Energy 2015年第3期9卷 362-370页

作者： Bayu PRABOWO herri susanto Kentaro UMEKI Mi YAN Kunio YOSHIKAWA Department of Environmental Science and Technology Tokyo Institute of Technology Yokohama 226-8503 Japan Institute of Energy and Power Engineering Zhejiang University of Technology Hangzhou 310014 China Department of Chemical Engineering Institut Teknologi Bandung Bandung 40132 Indonesia Division of Energy Science Lulea University of Technology Lulea 971 87 Sweden Institute of Energy and Power Engineering Zhejiang University of Technology Hangzhou 310014 China Department of Environmental Science and Technology Tokyo Institute of Technology Yokohama 226-8503 Japan

This paper explored the feasibility and benefit of CO2 utilization as gasifying agent in the autothermal gasification process. The effects of CO2 injection on reaction temperature and producer gas composition were examined in a pilot scale downdraft gasifier by varying the CO2/C ratio from 0.6 to 1.6. O2 was injected at an equivalence ratio of approximately 0.33-0.38 for supply- ing heat through partial combustion. The results were also compared with those of air gasification. In general, the increase in CO2 injection resulted in the shift of combustion zone to the downstream of the gasifier. However, compared with that of air gasification, the long and distributed high temperature zones were obtained in CO2-O2 gasification with a CO2/C ratio of 0.6-1.2. The progress of the expected CO2 to CO conversion can be implied from the relatively insignificant decrease in CO fraction as the CO2/C ratio increased. The producer gas heating value of CO2-O2 gasification was consistently higher than that of air gasification. These results show the potential of CO2-O2 gasification for producing high qualityproducer gas in an efficient manner, and the necessity for more work to deeply imply the observation.

关键词： Keywords biomass gasification CO2 downdrafl gasifier,autothermal

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Determination of Absorption Capacity and Mass Transfer Coefficient of Several Oils as Solvents for Biomass Gasification Cleaning System

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Journal of Chemistry and Chemical Engineering 2012年第4期6卷 327-335页

作者： Suhartono herri susanto Takao Kokugan Department of Chemical Engineering Universitas Jenderal Achmad Yani Cimahi 40531 Indonesia Department of Chemical Engineering Institute Teknologi Bandung Bandung 40132 Indonesia Department of Chemical Engineering Tokyo University of Agriculture and Technology Tokyo 184-5855 Japan

With the aim to find an absorbing liquid suitable for the gas cleaning system in the application of gasification unit in a remote area, three types of oil were tested using a bubble column and a wetted wall column. Air streams containing toluene vapour with flowrates of 13.6 mL-min1 or 27.6 ***^-1 were bubbled through a 50 mL static oil in a glass tube at a temperature of 30 ℃ or 60 ℃. In experiments using the wetted wall column, air streams containing toluene were contacted with a falling thin film ofoil on the outer wall of a column with a diameter of 6.4 cm and two different contacting heights of 60 cm or 80 cm. Toluene concentrations in the air stream were adjusted in the range of 700-3000 ppm corresponding to a typical tars concentration in the producer gas. The phase equilibrium of toluene was represented as values of 1/tl of 326, 220 and 182 respectively for lubrication oil, palm oil and sunflower oil （H is Henry＇s constant with the toluene concentrations in g.L^-1 for liquid phase and ***^-3 for gas phase）. From experiments using the bubble column, it was found that the overall mass transfer coefficient （Kc, a） was in the order of 10.3 cm3-min^-1 and the overall liquid phase mass transfer coefficient （KLa）was about 10.3 ***^-1. Although lubrication oil had a slightly better absorption capacity than the other two tested oils, it had a lower mass trasfer coefficient than that of palm oil. All three proposed oils had a much better absorption capacity and absorption rate than that of water used conventionally as a scrubbing liquid in a small biomass gasification plant.

关键词： Henry's constant absorption of VOC scrubbing oil tars removal.

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大粒径厨余垃圾水热碳化制备炭燃料

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环境科学学报 2022年第4期42卷 268-275页

作者：严密朱高俊胡卿胡睿雄刘瑜 herri susanto 徐璋浙江工业大学能源与动力工程研究所杭州310014 浙江浙能富兴燃料有限公司杭州311121 万隆理工学院化学与工程学院万隆印度尼西亚40132

开展了不同温度条件(150~300℃)下大粒径(>2 cm)厨余垃圾水热碳化实验,研究了水热炭的理化性质、燃烧特性和关键元素迁移规律.实验结果表明,当水热温度过低,厨余垃圾颗粒尺寸影响水热碳化效果;大粒径厨余垃圾碳化需更高的水热温度;水热... 详细信息

开展了不同温度条件(150~300℃)下大粒径(>2 cm)厨余垃圾水热碳化实验,研究了水热炭的理化性质、燃烧特性和关键元素迁移规律.实验结果表明,当水热温度过低,厨余垃圾颗粒尺寸影响水热碳化效果;大粒径厨余垃圾碳化需更高的水热温度;水热温度250~300℃产生的水热炭具有高热值(24.48~26.9 MJ·kg^(-1))、高燃料比(0.44~0.56)、高含碳量(59.6%~65.6%)和低含灰量(8.51%~4.35%)的特点.随着水热温度提高,水热炭中碳含量升高、灰含量下降;水热炭的着火温度、燃烬温度、挥发分释放特性指数VI、可燃性指数CI和综合燃烧特性指数CP均上升,提高了燃烧稳定性;同时水热炭中K、Na浓度降低,有利于降低水热炭燃烧结焦;N、S在水热炭中分布比例下降,这将减少水热炭燃烧的烟气污染物排放.因此,水热碳化能实现大粒径厨余垃圾的燃料化利用.

关键词：厨余垃圾大粒径水热水热炭燃烧

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