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1
Content available Comparative analysis of heat release in a reciprocating engine powered by a regular fuel with pyrolysis oil addition
Chwist Mariusz
Combustion Engines
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2022
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R. 61, nr 3
104--112
EN
The article presents a comparative analysis of heat release rate in a spark-ignition engine powered by various fuels as follows: butanol, gasoline, a mixture of butanol with tire pyrolysis oil (TPO), and mixtures of butanol with oil from biomass pyrolysis (BPO). Selected combustion phases were analyzed. Additionally, ignition delay calculations were performed in the ANSYS Chemkin Pro program for the surrogates of the tested fuels. Popular surrogates quoted in numerous publications were used as substitute fuels. The paper presents an original surrogate of oil from tire pyrolysis.
2
Content available By-products from thermal processing of rubber waste as fuel for the internal combustion piston engine
Chwist Mariusz, Pyrc Michał, Gruca Michał, Szwaja Magdalena
Combustion Engines
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2020
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R. 59, nr 2
11--18
EN
The article presents results of investigation on the combustion of a mixture of pyrolysis oil from tires and regular fuel in the internal combustion reciprocating piston engine. The tested fuel consisted of: diesel fuel and pyrolysis oil at amount of 10% by volume. The tests were carried out on a single-cylinder naturally aspirated compression-ignition engine. The engine was equipped with a common rail fuel injection system and an electronic control unit that allowed changing injection timing. A comparative analysis of pressure-volume charts for the reference fuel, which was diese fuel, and for a mixture of diesel with 10% addition of pyrolysis oil was carried out. Injector characteristics for the reference fuel and the mixture were determined. Engine efficiency for both fuels was also determined. Unrepeatability of the engine work cycles for the diesel fuel and the tested mixture was calculated. Finally, exhaust toxic emission was analyzed. It was found that the pyrolysis oil can be used as valuable additive to regular diesel fuel at amount up to 10%, however, toxic exhaust gases emission was increased.
3
Content available remote Zgazowanie osadu ściekowego ze ślazowcem pensylwańskim
Szwaja Stanisław, Poskart Anna, Zajemska Monika, Szwaja Magdalena, Chwist Mariusz
Przemysł Chemiczny
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2019
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T. 98, nr 2
278--282
PL
Przedstawiono wyniki badań doświadczalnych i obliczeniowych procesu zgazowania osadów ściekowych z biomasą ślazowca pensylwańskiego, zmieszanych ze sobą w stosunku 1:1. Osuszony osad ściekowy można poddać procesowi zgazowania w temp. powyżej 800°C. Ze względu na dużą zawartość substancji mineralnej w osadzie (powyżej 30%) trudnością okazało się jednak osiągnięcie zadanej temperatury oraz utrzymanie stabilnego procesu zgazowania. W związku z tym zdecydowano aby osad ściekowy mieszać z materiałem o niższej zawartości popiołu oraz o wyższej wartości opałowej, co poprawiło parametry zgazowania, w tym wydajność powstającego gazu i stabilność procesu. Dokonano pomiaru składu syngazu, a ponadto za pomocą oprogramowania Chemkin przeanalizowano opracowany model dwustrefowy i obliczono stężenia najważniejszych składników powstałego gazu: H₂, CH₄, CO i CO₂.
EN
A sewage sludge (humidity < 10%, grain diam. 5-15 mm) was mixed with a shredded biomass of Virginia Mallow (humidity < 10%, grain diam. 5-30 mm) in a mass ratio of 50:50, to increase the gasification temp. of the obtained mixt. in a fixed bed reactor to above 800°C. The chem. compn. of the gases was detd. in accordance with the revelant stds. In addn., the chem. compns. of the gasification products of both reactants mixed in various mass proportions were calcd. by computer simulation based on a com. software. The simulation results confirmed the exptl. data as well as showed that the gasification temp. above 800°C was possible to achieve for reactants mixts. with 50-75% share of sewage sludge.
4
Content available Pyrolysis oil combustion in the CI engine
Chwist Mariusz, Grab-Rogaliński Karol, Szwaja Stanisław
Combustion Engines
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2019
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R. 58, nr 4
126--131
EN
Pyrolysis oil obtained from thermal biomass processing (torrefaction and pyrolysis) was used as an additional fuel for the compression-ignition engine equipped with a classic (non-common rail) injection system. The basic fuel used to the engine was regular diesel fuel. The tests were carried out with two content of pyrolysis oil in diesel fuel as follows: 10 and 20% by volume. In addition, the combustion process was investigated in the engine operating only on pyrolysis oil. The test results were based on a comparative analysis, where the diesel fuel was used as the reference fuel. The obtained results indicate that is a real possibility of co-combustion of pyrolysis oil with diesel fuel in the CI engine. On the other hand, a decrease in engine power resulting from the lower calorific value of pyrolysis oil and a greater unrepeatability of engine consecutive work cycles were observed.
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