Effects of biomass type, blend composition, and co-pyrolysis temperature on hybrid coal quality

Sasongko, Dwiwahju; Wulandari, Winny; Rubani, Inga Shaffira; Rusydiansyah, Rifqi

doi:10.1063/1.4974430

Cited by 5 publications

(10 citation statements)

References 5 publications

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“…Hybrid coal production was carried out in a series of trials by varying the composition of biomass in the mix respectively 20, 30, and 40% (Rizkiana et al, 2018;Sasongko et al, 2017). In this simulation study, variation with 20% biomass composition in the feed was investigated.…”

Section: Simulation Results and Model Validationmentioning

confidence: 99%

“…In the co-pyrolysis stage, the granules were heated in temperature 300 o C, and nitrogen gas was flowed to maintain inert condition for an hour. Hybrid coal as a product then analyzed by proximate and ultimate analysis (Rizkiana et al, 2018;Sasongko et al, 2017). Table 1 shows the proximate and ultimate analysis of the lignite coal and mahogany sawdust (Rizkiana et al, 2018;Sasongko et al, 2017).…”

Section: Experimental Methodsmentioning

confidence: 99%

“…Proximate and ultimate analysis data of biomass, coal, and feed(Rizkiana et al, 2018;Sasongko et al, 2017).…”

mentioning

confidence: 99%

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Model Validation of Biomass-Coal Blends Co-Pyrolysis to Produce Hybrid Coal

Zahra

Prasetyo²,

Rizkiana

et al. 2019

IJE

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Co-pyrolysis of coal and biomass blend to produce hybrid coal has recently been experimentally studied by some previous researchers. For similar generated energy, a newly developed hybrid coal is claimed to be more environmentally friendly compared to the coal only due to the release of neutral CO2. To acquire a better understanding of co-pyrolysis of coal and biomass blend, an experiment had been carried out in a tubular furnace reactor. For this purpose, the blends of constant mass composition of 20 wt% sawdust and 80 wt% low-rank coal were used throughout the study. It was found from the experiment that approximately 42.1% carbon, and 1.6% of ash were produced from the co-pyrolysis blend. Then, a steady state simulation of co-pyrolysis was developed using Aspen Plus v8.8 to predict the hybrid coal carbon content and required heat to perform the co-pyrolysis. The model simulation showed that hybrid coal yielded 44.0% carbon, which was at 4.5% deviation from the experimental study. The model had also been successfully used to estimate heat required to produce hybrid coal. It predicted that the equivalent heat of 336.2 kW was required to produce hybrid coal from 1,000 kg/h blend feed. The heat generated by the modeling of sawdust biomass combustion for fuel purposes was also estimated to supply heat for endothermic co-pyrolysis. It was found that 1,000 kg/h sawdust was predicted to be equivalent to 371.4 kW. This suggests that for scaling up purpose, ratio of sawdust fuel to blend feed of 1:1.1 is sufficient for this process. Keywords: co-pyrolysis, hybrid coal, low-rank coal, sawdust, Aspen Plus

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Section: Simulation Results and Model Validationmentioning

confidence: 99%

Section: Experimental Methodsmentioning

confidence: 99%

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Model Validation of Biomass-Coal Blends Co-Pyrolysis to Produce Hybrid Coal

Zahra

Prasetyo²,

Rizkiana

et al. 2019

IJE

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“…Several study and work related to coal and various biomass waste type co-pyrolysis have shown the same tendencies on increasing hybrid coal calorific value and decreasing CO2 emission. The study shows that hybrid coal have lower H/C ratio from coal, thus inferred that the ignition temperature of hybrid coal is lower compared to its raw coal and biomass which implicates on reducing the initial energy required to burn hybrid coal (Quan & Gao, 2016;Sasongko et al, 2017).…”

Section: Objective Of the Studymentioning

confidence: 95%

“…This will cause problems, especially for its transportation. (Sasongko, Wulandari, Rubani, & Rusydiansyah, 2017 (Gielen, Saygin, & Rigter, 2017;Tun, Juchelkova, Win, Thu, & Puchor, 2019).…”

Section: Potential Indonesian Biomass Sourcesmentioning

confidence: 99%

Heat Quality Enhancement and Carbon Dioxide Emissions Reduction from Coal Burning by Combining Low-Ranked Coal with Biomass Waste as A Clean Energy Solution to Achieve Energy Security in Indonesia

Baskoro

Taskaya

Prajasto

et al. 2021

IJE

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Indonesia is the fifth largest coal producer in the world with coal reserves reaching 39.56 billion tonnes. Coal reserves of medium and high quality are expected to be exhausted in 2048, therefore it is necessary to utilize low-ranked coals. Low-ranked coals have a low heating value (<5,100 kcal/kg) and produce greater CO2 emissions compared to medium and high rank coals. One method to increase heating value and reduce CO2 emissions from low-ranked coals is through the Utilization of hybrid coal. Hybrid coal is low quality coal combined with biomass waste and has undergone a pyrolysis process together. The mixing and co-pyrolysis of low-ranked coal with biomass waste such as rice husk, empty palm fruit bunches, and rubber wood with a ratio of 7:3 is known to be able to increase the final product calorific value by 31.10–44.12% and reduce non-neutral CO2 emissions by 15.56–21.31%. The hybrid coal production process is highly prospective to be implemented in Indonesia, especially in Central Java, South Sumatra and South Kalimantan. The payback period from the hybrid coal industry with a production capacity range of 540 thousand to 4.5 million TPY can be achieved in 10–13 years with a net profit range of IDR 137 billion to IDR 493 billion per year and a net present value range of IDR 285 billion to IDR 1.1 trillion.

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