scholarly journals The Removal of Biomass Tar Derived Producer Gas by Means of Thermal and Catalytic Cracking Methods

2021 ◽  
Vol 88 (2) ◽  
pp. 147-156
Author(s):  
Hafnee Lateh ◽  
Juntakan Taweekun ◽  
Kittinan Maliwan ◽  
Zainal Alimuddin Zainal Alauddin ◽  
Sukritthira Rattanawilai
Keyword(s):  
Heat Transfer ◽  
Removal Efficiency ◽  
Catalytic Cracking ◽  
Carbon Deposition ◽  
Catalyst Surface ◽  
Biomass Gasification ◽  
Producer Gas ◽  
Tar Removal ◽  
Biomass Tar ◽  
Microwave Assistance

Tar derived from biomass gasification system needs to be eliminated before applying biomass producer gas for avoiding equipment and its gas problems. In this study, thermal and catalytic cracking methods of biomass tar along with microwave assistance in heat transfer were experimented at various temperatures during 650-1,200 °C and residence at 0.24-0.5 s. The results present that high tar removal efficiency by approximately 90 % under thermal cracking treatment and about 98 % with catalytic cracking method. It also shows that the catalytic cracking especially modified catalyst could be lowered carbon deposition on catalyst surface.

Recent Progress in Biomass Tar Catalytic Cracking Method Research

2012 ◽  
Vol 608-609 ◽  
pp. 448-452 ◽  
Author(s):  
Jun Tao ◽  
Qiang Lu ◽  
Chang Qing Dong ◽  
Xiao Ze Du
Keyword(s):  
Environmental Pollution ◽  
Low Temperatures ◽  
Catalytic Cracking ◽  
Recent Progress ◽  
Biomass Gasification ◽  
Tar Removal ◽  
Advantages And Disadvantages ◽  
Key Issues ◽  
Biomass Tar ◽  
The Common

A major problem in the current biomass gasification systems is the formation of tar. The condensed tar at low temperatures may cause blockage and pollution of downstream equipments, as well as environmental pollution. Therefore, the removal and conversion of tar are the key issues for biomass gasification. At present, the common methods of tar removal are mainly mechanism methods, thermal cracking and catalytic cracking. In this paper, the catalytic cracking method and its advantages and disadvantages are discussed.

scholarly journals Thermal and Catalytic Cracking of Toluene Using Char from Commercial Gasification Systems

Energies ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3764 ◽  
Author(s):  
Cordioli ◽  
Patuzzi ◽  
Baratieri
Keyword(s):  
Catalytic Activity ◽  
Removal Efficiency ◽  
Catalytic Cracking ◽  
Biomass Gasification ◽  
Catalytic Performance ◽  
Heavy Hydrocarbons ◽  
Tar Removal ◽  
Toluene Removal ◽  
Degradation Tests ◽  
Pyrolytic Char

Tar formation hinders the development of biomass gasification technologies. The use of pyrolytic char as a catalyst for removing tar has been widely investigated; its large specific surface area and pores distribution make it a good candidate for the cracking of heavy hydrocarbons. The present work assesses the catalytic activity of char from a commercial gasifier. Thermal degradation tests in N2 and in CO2 proved that the char is suitable for high-temperature applications (catalytic cracking) and showed release of CO and H2, which might affect the catalytic performance of the char when used for tar removal applications. For inspecting the potential of the char for tar removal, toluene was chosen as model tar. Through GC-FID, toluene removal efficiency and the amount of benzene produced from its decomposition were evaluated. Tests up to 1273 K resulted in tar removal efficiencies as high as 99.0%, and empty reactor tests allowed for discerning the effects of thermal and catalytic cracking. The catalytic activity of the char was more pronounced at 1173 K, as char increased the toluene removal efficiency from 39.9% (empty reactor) to 60.3%. The results confirmed that gasification char, like pyrolytic char, has a high potential for catalytic tar removal applications.

scholarly journals AN EFFECT OF SPRAY CONFIGURATION AND ADSORBENT MATERIAL ON PERFORMANCE OF THE SPRAY SCRUBBER IN THE DOWNDRAFT GASIFIER-ENGINE SYSTEM

2021 ◽  
Vol 83 (6) ◽  
pp. 167-174
Author(s):  
Anak Agung Susastriawan ◽  
Yuli Purwanto ◽  
Purnomo Purnomo ◽  
Kade Vindo ◽  
Adi Hariyanto
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Rate ◽  
Transfer Rate ◽  
Cross Flow ◽  
Small Scale ◽  
Producer Gas ◽  
Tar Removal ◽  
Downdraft Gasifier ◽  
Cooking Oil ◽  
Engine System

The work aims to investigate an effect of spray configuration and adsorbent material on performance of wet scrubber in removing tar gravimetric in producer gas. The scrubber is installed at small scale downdraft gasifier-engine system and the tests are conducted in two sections. Firstly, the scrubber is tested using water adsorbent at various spray flow configurations to the producer gas flow (cross flow, counter flow, mixed flow). Secondly, the scrubber is tested using adsorbent of cooking oil and waste of engine lubricant at cross flow spray configuration. The performance of the scrubber investigated are temperature profile, log mean temperature difference, heat transfer rate, and tar removal effectiveness. For spray configuration test, the result shows that cross spray configuration (CrS) has the optimum performance. The CsS scrubber has the highest LMTD, heat transfer rate, and tar removal efficiency among others. The values are 29.8°C, 7.84 kW, and 0.43, accordingly. Meanwhile, the test using different adsorbent indicates adsorption property of the adsorbent plays an important rules in tar removal effectiveness of the scrubber. The removal effectiveness of the scrubber for using adsorbent of water, cooking oil, and engine lubricant are 0.43, 0.12, and 0.60, respectively.

scholarly journals CO2 Capture from Biomass Gasification Producer Gas Using a Novel Calcium and Iron-Based Sorbent through Carbonation–Calcination Looping

2020 ◽  
Vol 59 (41) ◽  
pp. 18447-18459
Author(s):  
Forogh Dashtestani ◽  
Mohammad Nusheh ◽  
Vilailuck Siriwongrungson ◽  
Janjira Hongrapipat ◽  
Vlatko Materic ◽  
...  
Keyword(s):  
Co2 Capture ◽  
Biomass Gasification ◽  
Producer Gas ◽  
Iron Based

Measurements of the Laminar Burning Velocities for Typical Syngas–Air Mixtures at Elevated Pressures

2011 ◽  
Vol 133 (3) ◽  
Author(s):  
Eliseu Monteiro ◽  
Abel Rouboa
Keyword(s):  
Energy Source ◽  
Equivalence Ratio ◽  
Functional Form ◽  
Burning Velocity ◽  
Biomass Gasification ◽  
Producer Gas ◽  
Volume Percentage ◽  
Elevated Pressures ◽  
Syngas Combustion ◽  
Heat Value

In the currently reported work, three typical mixtures of H2, CO, CH4, CO2, and N2 have been considered as representative of the producer gas (syngas) coming from biomass gasification. Syngas is being recognized as a viable energy source worldwide, particularly for stationary power generation. However, there are gaps in the fundamental understand of syngas combustion characteristics, especially at elevated pressures that are relevant to practical combustors. In this work, constant volume spherical expanding flames of three typical syngas compositions resulting from biomass gasification have been employed to measure the laminar burning velocities for pressures ranges between 1.0 and 20 bar tanking into account the stretch effect on burning velocity. Over the ranges studied, the burning velocities are fit by a functional form Su=Su0(T/T0)α(P/P0)β; and the dependencies of α and β upon the equivalence ratio of mixture are also given. Conclusion can be drawn that the burning velocity decreases with the increase of pressure. In opposite, an increase in temperature induces an increase of the burning velocity. The higher burning velocity value is obtained for downdraft syngas. This result is endorsed to the higher heat value, lower dilution and higher volume percentage of hydrogen in the downdraft syngas.

Sign in / Sign up

Export Citation Format

Share Document