Tar Cracking Research Articles

Effects of oxidation degree of support and phosphorus modification on the catalytic cracking of coal pyrolysis tar by char-supported nickel catalysts

The low rank coal can be converted efficiently when it undergoes the pyrolysis process. The utilization of tar is modified and the problems such as pipeline blockage are solved by cracking and lightning heavy components in tar. In this study, the char-supported nickel (Ni) catalysts were prepared by different Ni loading methods, and the cracking of coal pyrolysis tar was improved by the coal char support with different oxidation degrees. The catalysts prepared by ion exchange method showed better performance for the tar cracking than other methods, which is related to their smaller Ni crystallite size (NCS). The oxidation of H2O2 and HNO3 significantly increased the number of oxygen-containing groups. The intrinsic correlation between oxidation degree of support and catalytic property indicated that the XH2O2-Ni/C (ZD coal pretreated by H2O2) series catalysts had better tar cracking activity than XHNO3-Ni/C (ZD coal pretreated by HNO3) series catalysts, which did not only depend on the increase of Ni loading amounts but also related to the smaller NCS and higher dispersion. Moreover, the non-metallic additive phosphorus (P) was added to modify the catalysts. It was found that the addition of P significantly improved the tar cracking performance of the 30%H2O2 P-Ni/C catalyst. The amounts of active components loaded and NCS contributed to the production of light tar.

Оценка возможности получения мезофазы при термообработке различных видов углеводородного сырья

The possibility of obtaining anisotropic pitches by heat treatment of various types of petroleum feedstock is shown - isotropic pitches from heavy pyrolysis tar and heavy catalytic cracking gas oil. The dependences of the change in the group compositionof the heat treatment residues on the duration of isothermal exposure, the correlation between the components insoluble in toluene and quinoline, have been established. Features of the optical texture of the heat treatment residues of isotropic petroleum pitches of various origins are revealed.

Influence of coal bottom ash additives on catalytic reforming of biomass pyrolysis gaseous tar and biochar/steam gasification reactivity

This work investigated the effect of CBA additives as bed material in gasification process on gaseous tar catalytic reforming characteristic and biochar/steam gasification reactivity adopting a lab-scale dual-stage fixed bed furnace and a thermogravimetric analyzer equipped with water vapor furnace. Results showed that CBA additive exhibited good catalytic performance for tar cracking and gas upgrading effect on the basis of larger specific surface area as well as higher content of metallic matters. Particularly, tar conversion efficiency and syngas acquired peaking at 92.39% and 594.3 mL/g adopting mixing biochar (PSC) with CBA at ratio of 1:15 (PSC-15CBA) as catalyst at reforming temperature of 900 °C, respectively, in which the main components of syngas are H2, CO and CH4. It is noted that PSC-nCBA exhibited higher deoxygenation extent and single-ring aromatics and aliphatic selectivity in tar, and the polycyclic aromatics selectivity evidently decreased. The CBA additive has a beneficial impact on the biochar/steam gasification reactivity. Interestingly, a relatively high proportion of CBA additive has a negative impact on promoting reactivity. Result from kinetics analysis that CBA additive had ability to reduce the activation energy of PSC gasification process.

Comparison of reaction characteristics and kinetics between tar thermal cracking and steam reforming in a micro fluidized bed reaction analyzer

In this study, a micro fluidized bed reaction analyzer (MFBRA) was used to investigate the reaction characteristics of tar thermal cracking and steam reforming at different temperatures (T, 750, 850, and 950 °C) and steam partial pressures (SP, 10%, 20%, and 30%). The reaction kinetics, including gas components generation (H2, CO, CO2, and CH4) and carbon (C) conversion in gas products, were calculated and further compared. For the two processes, the behaviors of gas generation and C conversion can be classified as Stage-1 and Stage-2 based on the different increases. By raising temperature and SP, the yields of H2/CO/CH4 and C conversion increased obviously, while CO2 showed a growing and subsequently declining trend. A similar phenomenon also existed in the relationship between reaction rate Vs. gas yield/C conversion. Compared to thermal cracking, the reaction time in tar steam reforming became much longer; the yields of H2/CO/CH4 and the C conversion increased significantly, while CO2 decreased. In the meantime, there was a clear reduction in all reaction rates of gas generation and C conversion. Furthermore, in tar steam reforming, the activated energy (Ea) of gas components generation (H2, CO, CO2, and CH4) decreased from 114.92 to 90.48, 86.54–74.49, 32.39–28.87, and 55.34–42.06 kJ/mol, respectively; and Ea of total C conversion lowered from 87.74 to 65.75 kJ/mol. Additionally, SP had no impact on Ea during tar steam reforming. To ensure the validity of the test results by MFBRA, the kinetics of tar thermal cracking was compared with that in the literature.

Preparation of highly dispersed lignite-char-supported cobalt catalyst for stably steam reforming of biomass tar at low temperature

The removal of generated tar during the biomass gasification is a serious issue. Catalytic tar cracking is one of the most efficient methods to reduce tar deposition while many common tar cracking catalysts suffer problems of serious carbon deposition and active metal sintering, especially at low temperatures. Therefore, developing catalysts with both high activity and stability is critical. In this work, we aim to prepare catalysts with a high active metal contents, a small metal particle size and a high dispersion to contribute to the highly efficient tar removal at relatively low temperatures. By adjusting the type and the concentration of the Co precursor solution when lignite is used as the carbon precursor, we prepared a series of catalysts which were then applied for both activity and stability test of the steam reforming of model tar and biomass tar. The results show that Co0.15-C2H3O2− prepared with a 0.15 M solution of Co(C2H3O2)2·4H2O achieves a Co content of about 16.0 wt% with an average particle size of about 3.77 nm and a relatively high metallic Co dispersion. For steam reforming of toluene, the catalyst achieves an almost 100 % toluene conversion at 400 °C and exhibits a high stability in the 100 h test. Moreover, Co0.15-C2H3O2−, which produces approximately 283.8 mL.gcorncob−1.gcat−1.h−1 H2 catalytically, is also active and stable in biomass tar cracking. The catalyst prepared in the present study by using the economic and simple ion-exchange method also has a well-dispersed nano-metal-loaded structure and can efficiently remove the tar at a low temperature with a high stability, which will contribute to the industrial application in the future.

Kinetic Modeling and Optimization of Biomass Gasification in Bubbling Fluidized Bed Gasifier Using Response Surface Method

This paper presents the kinetic modeling of biomass gasification in bubbling fluidized bed (BFB) gasifiers and optimization methods to maximize gasification products. The kinetic model was developed based on two-phase fluidization theory. In this work, reaction kinetics, hydrodynamic conditions, convective and diffusion effect, and the thermal cracking of tar kinetics were considered in the model. The model was coded in MATLAB and simulated. The result depicted good agreement with experimental work in literature. The sensitivity analysis was carried out and the effect of temperature ranging from 650 to 850 and steam to biomass ratio (S/B) ranging from 0.1 to 2 was investigated. The result showed that an increase in temperature promoted H2 production from 18.73 % to 36.87 %, reduced that of CO from 39.97 % to 34.2 %, and CH4 from 18.01 % to 11.65 %. Furthermore, surface response was constructed from the regression model and the mutual effect of temperature and S/B on gasification products and heating value was investigated. In addition, the desirability function was employed to optimize gasification product and heating value. The maximum gasification product yield was obtained at 827.9 and 0.1 S/B. The response predicted by desirability function at these optimum operational conditions was 30.1 %, 44.1 %, 13.2 %, 12.9 %, 14.035 MJ/Nm3, and 14.5 MJ/Nm3 for H2, CO, CO2, CH4, LHV, and HHV, respectively. Kinetic modeling of the biomass gasification in BFB process is still under development, which considers the diffusion effect, tar cracking, reaction kinetics, and hydrodynamic behavior. Moreover, the large number of previous studies gave priority to a single parameter investigation. However, this investigation can be extended to various parameters analysis simultaneously, which would give solid information on system performance analysis.

Investigation of the catalytic performance of coal gangue char on biomass pyrolysis in a thermogravimetric analyzer and a fixed bed reactor

• Coal gangue rich in metals was used to prepare char-supported catalysts. • Coal gangue char can reduce the activation energy required for pine pyrolysis. • The yield of gas increased with the increase of the coal gangue char mass ratio. • The liquid product yields decreased by 19.01% at PS and CG mass ratio of 1:2. Developing low-cost and high-performance catalysts is an important part of the development of biomass pyrolysis technologies. In this study, the coal gangue rich in metals was used to directly prepare a char-supported catalyst, and metals in coal gangue were hoped to act as catalytic sites for in-situ biomass catalytic pyrolysis and secondary tar cracking. The influence of coal gangue char on pine pyrolysis behavior and kinetics was investigated in the thermogravimetric analyzer and a fixed bed reactor. The thermogravimetric analysis showed that the addition of coal gangue char caused the movement of the initial weight loss temperature and the maximum weight loss peak of the samples to the high-temperature region. With the increase of the coal gangue char mass ratio, lower apparent activation energies of the samples were achieved in the conversion range of 0.2–0.8. Through fixed-bed isothermal pyrolysis experiments, it was found that the yield of gas increased with the increase of the coal gangue char mass ratio, while the tar yield decreased quickly. The yield of H 2 and CO was significantly improved by the coal gangue char, further confirming the catalytic performance of coal gangue char on the cracking of tar molecules.

Investigation into biochar supported Fe-Mo carbides catalysts for efficient biomass gasification tar cracking

Advanced and low-cost catalytic materials (catalysts) play an enabling role in tar cracking for biomass gasification technology and contributing to reducing CO2 emissions. Herein, a biochar supported Fe-Mo carbides catalyst was synthesized by impregnation method combined with in-situ carbothermal reduction from abundant biomass raw materials. The catalytic performance over a series of Fe-Mo carbides catalysts was examined by a two-stage pyrolysis-catalysis reactor. The addition of Mo species promoted the carbon solvation on the surface of Fe particles to form Fe3C active sites which further etching the carbon support with an abundant mesoporous structure. Fe-Mo0.5@C catalyst demonstrated a high tar cracking efficiency of 91.05% and remained at 84.77% after 5 cycles. The tar conversion pathways were summarized based on gas yields and components of residual tar. The Fe3C-Mo2C active sites contributed to the cleavage of oxygen-containing macromolecules to generate light aromatic hydrocarbons and phenolic substances with stable structures. Besides, the carbothermal reduction regeneration was carried out under N2 atmosphere at 800 °C to obtain regenerated catalysts to overcome coke deposition and metal oxidation, which recovered the tar conversion efficiency to 90.41%. The tar catalytic cracking mechanism over biochar supported Fe-Mo carbides catalyst was also first proposed. The results showed that biochar supported Fe-Mo carbides catalyst is a promising catalyst for efficient biomass tar catalytic cracking.

Tar cracking enhancement by air sparger installation in the combustion zone of the downdraft gasifier

In the present article, experimental studies are performed on Imbert downdraft gasifier using two different air distribution systems (two-nozzle and air-sparger) for the combustion zone. A novel air distribution system (air-sparger) is designed to supply uniform air across the combustion zone for achieving uniform temperature and enhancing the tar cracking. The effect of operating parameters (Equivalence ratio, temperature, air flow rate, and biomass consumption) on the tar cracking and producer gas compositions are investigated. Tar is measured in the producer gas before and after the gas cleaning units using a stack monitoring system. The experiments are performed by varying the airflow rate between 3 and 7 Nm3 h−1, and the equivalence ratio varies from 0.24 to 0.38. The operating parameters and air-sparger have significantly influenced the zone's temperature, producer gas composition, and the tar content in the producer gas. The maximum temperature of the combustion zone and reduction zone increases from 764 to 975 °C and 467 to 760 °C respectively with the air-sparger compared to the two-nozzle conventional air distribution system at the airflow rate of 7 Nm3 h−1. The lower heating value of the producer gas and the cold gas efficiency of the gasifier increased from 4.28 to 4.37 MJ Nm−3 and 48.55–55.05%, respectively, with the air-sparger. The incorporation of air-sparger reduces tar in producer gas from 23.95 to 0.97 g Nm−3 before gas cleaning unit at the airflow rate of 7 Nm3 h−1. Air-sparger has shown the adequate potential to enhance tar cracking and improve the overall gasifier performance.

A-site disubstituted of La1−xSrxNi0.8Fe0.2O3 perovskite on coal pyrolysis volatiles catalytic cracking: Activity and reaction mechanism

This work focuses on the result of strontium doping on La1−xSrxNi0.8Fe0.2O3 catalytic cracking of coal tar in the COREX process. The results show that Sr doping significantly affected the catalytic performance of perovskite. O2-Temperature programmed desorption (O2-TPD) and X-ray photoelectron spectroscopy (XPS) results show that La0.8Sr0.2Ni0.8Fe0.2O3 (Sr 0.2) has more active oxygen species and higher oxygen mobility. The performance of Sr-doped catalysts is higher than that of LaNi0.8Fe0.2O3, producing less tar and carbon deposition. Moreover, Sr 0.2 exhibited the highest gas yield of 34.6 mmol/gcoal, H2 yield of 27.5 mmol/gcoal, 100% tar conversion rate, and the lowest carbon deposition of 19.4 mg/(g·h). Tar cracking mechanism was proposed by characterization results. The perovskite could serve as a bridge for oxygen migration and simultaneous oxygen supplementation, thus sustaining catalyst activity and durability. The appropriate amount of Sr doping perovskite is favorable to high catalytic activity and anti-carbon deposition at high temperatures. This work could provide some referential value for the highly-efficient cracking of tar.

Preparation of pyrolyzed CaO-containing carbon pellets: Effect of temperature on pyrolysis behavior and structural evolution

The pyrolyzed calcium oxide (CaO)-containing carbon pellets (CCCPs) can be used as an alternative raw material for the calcium carbide (CaC2) production. In order to prepare highly reactive pyrolyzed CCCP, it is necessary to study the effect of pyrolysis temperature on pyrolysis behavior and structural evolution of pyrolyzed CCCPs. The reactivity of pyrolyzed CCCPs was evaluated from three aspects. The TG results showed that the pyrolysis of CCCPs included two main stages. CaO could promote the cracking of tar and increase the gas yield of CCCPs. Over 873 K, the proportion of pores over 10 µm in CCCP increased significantly. Over 673 K, the disorder degree of carbon (AD1/AG) in CCCPs gradually increased with temperature increasing. CaO would inhibit char graphitization in CCCP pyrolyzed over 973 K. A mechanism for the phase evolution of CaO during the pyrolysis of CCCPs was elucidated. The CCCP pyrolyzed at 1073 K was evaluated to have the best reactivity.

Effects of quicklime conditioning on the volatile reforming and tar elimination performance of sewage sludge pyrochar

The pyrochar of sewage sludge can be exploited for catalytic tar reforming since the developed pore structure and high metal content. However, Fe in the raw sludge tends to form Fe-S and Fe-P during pyrolysis, which inhibits catalytic activity of pyrochar. Here, the wet sludge was conditioned with quicklime, and the pyrochar was used to reform sewage sludge pyrolysis volatiles. The results showed that H2 generation from pyrochar reforming increased by 55.2% after conditioning. In addition, the tar elimination achieved the highest ratio (79.6%) compared with unconditioned char and quicklime, while PAHs and N-compounds were concentrated in tar with the relative content 46.9% and 37.1% due to the significant removal of other tar compounds such as oxygenates. During pyrolysis, a proportion of added CaO captured P and S anions which favored the formation of Ca2Fe2O5 and Fe-O, while the remaining CaO (21.9%) was highly dispersed on pyrochar. This promoted both the catalytic tar cracking effects and the CO2 absorption of the char. These findings provide a novel method to produce H2-rich gas from sewage sludge pyrolysis with less tar yield.

In Situ Removal of Benzene as a Biomass Tar Model Compound Employing Hematite Oxygen Carrier

Tar is an unavoidable biomass gasification byproduct. Tar formation reduces gasification efficiency and limits the further application of biomass gasification technology. Hence, efficient tar removal is a major problem to be solved in the formation and application of biomass gasification technology. Chemical looping gasification (CLG), a novel and promising gasification technology has attracted extensive attention owing to its low tar generation. Active oxygen carriers (OCs), the reduced OC in CLG, are considered to be excellent catalysts for tar cracking. In this study, the use of benzene as a typical tar model compound for tar removal using the iron ore OC is investigated. In the blank experiment, where an inert material (SiO2) is used as the carrier, the benzene cracking is relatively low, and the benzene conversion, H2 yield, and carbon conversion are 53.65%, 6.33%, and 1.24%, respectively. The addition of hematite promotes benzene cracking. A large amount of oxygen-containing gases (CO and CO2) are generated. Additionally, the conversion degrees for benzene, H2 and carbon are about 67.75%, 21.55%, and 38.39%, respectively. These results indicate that hematite performs both oxidation and catalysis during benzene cracking. The extension of the residence time facilitates benzene removal, owing to the good interaction between the gas phase and solid phase. The addition of water vapor inhibits the benzene conversion and promotes the conversion of carbon deposition. The lattice oxygen reactivity of hematite OC shows an uptrend as the cycle number is increased during the benzene conversion cycle. The experimental results confirm that CLG has a low-tar advantage and that hematite is an effective OC for benzene removal.

Recovery of pyrolysis char from residual biomass in accordance with the principles of the circular economy

Millet and buckwheat husk are biomass residues from mills and are considered waste materials for which don't have identified alternative recovery currently. Pyrolysis can be an attractive option which is conducive to waste management – a key element of the circular economy. In view of this, chars were produced from millet and buckwheat husk through pyrolysis, followed by physical activation with either CO2 or steam. Then, chars or activated chars produced were implemented in order to compared their capacity to remove tar from syngas. The tests were carried out at 650 °C and the syngas was composed of H2, CH4, CO, CO2 and N2, with 40 g/Nm3 of ethylbenzene as tar surrogate. The results showed that biomasses with low ash content, but which contained particular species as K and Ca knowing to have a positive impact on the tar cracking, combined with high porosity performed better in syngas upgrading. The chars produced from buckwheat husk has both of this characteristic what allows them to be reactive to crack the tars. In this regard, steam activation appears to be a better option than CO2 activation since it was able to create higher porosity as well as micro and mesopore level, and mineral species such as K and Ca were preserved in the solid phase. The aim of this paper is to investigate the recovery of local agricultural residue for conversion into useful material and energy vectors in the context of the circular economy through the pyro-gasification of buckwheat and millet husk.

Enhancement of perovskites performance for coal tar decomposition by pore structure and acid-base modification

Catalytic cracking is an efficient way to replace conventional combustion to remove coal tar deposited at the gas outlet of COREX melter gasifier. This work prepared a series of LaNi0.8Fe0.2O3 perovskites (Ni 0.8) with different pore structures via the hard-template method and applied in the catalytic cracking of coal tar was operated at 700 °C to evaluate the performance of perovskites. Ni 0.8 prepared via MCM-48 template (MCM-0.8) exhibited the high specific surface area (SSA) of 90.2 m2/g and pore volume of 0.3 cm3/g, accounting for its highest gas yield (51.8 mmol/gcoal) and complete tar removal. The remarkable oxidation capacity of MCM-0.8 resulted in its highest CO2 yield (11.2 mmol/gcoal) and selectivity for oxygenated compounds in tar (71.1 %). Three mesoporous Ni 0.8 participated in the catalytic reactions as the acid-base bifunctional catalysts. Ni 0.8 prepared via SBA-15 template (SBA-0.8) showed a great hydrocracking activity due to its strongest acidity of 1.87 mmol/g. All the synthesized perovskites possessed a good reactant selectivity, and the tarry product selectivity over different perovskites was influenced by the synergistic effect of acidity and the reactant diffusion inside the catalyst channels.

Enhanced stability of iron-nickel oxygen carriers in biomass chemical looping gasification by core-shell structure

The chemical cycle provides a novel platform for biomass tar gasification to produce fuels and oxidizers cleanly and efficiently. In this work, core-shell structured oxygen carriers were synthesized with FeNi-based oxides as the core and TiO2 as the shell. And the reaction performance with oxygen migration behavior was investigated by coupled pine sawdust chemical looping gasification. Due to the presence of Ni and Fe, high-density and well-dispersed NiFe2O4 and NiO nanoparticles were formed in the oxygen carriers as active sites to promote tar cracking. The active component, protected by the TiO2, has an increased content of lattice oxygen (OⅠ) and chemisorbed oxygen (OII), which is more likely to bind to C in the tar molecule to promote tar cracking. Compared to pyrolysis without oxygen carriers produced only 504.8 ml/g of syngas, the gas yield was significantly increased to 870.87 ml/g at 800 °C. In the water vapor atmosphere, the formation of hydrogen was promoted to a large extent by the reoxidation of iron by steam, resulting in a gas yield of up to 1100 ml/g and a carbon conversion efficiency of up to 93 % at 800 °C. And steady performance in 50 cycles of experiments with 2500 min was kept. It was found by the characterization that the structure of spent FNO@TiO2 oxygen carriers after 50 cycles was unchanged, which indicates that the core-shell structure oxygen carrier is a promising material for chemical looping gasification.

Carbon Functionalized Material Derived from Byproduct of Plasma Tar-Cracking Unit on Biomass Gasifier Collected Using Standard Impinger Method

Reduction of tar concentration in biomass gasification with secondary plasma tar cracking unit remains a challenge to meet the requirement for clean syngas energy applications. Typically, the post-treatment of syngas to reduce the tar from an updraft fixed-bed reactor is using secondary plasma tar cracking unit. In this study, an additional trapping train was introduced as a mechanism to harvest byproducts of the tar decomposition process (byproduct carbon functionalized material or BCFM). The measurement in gravimetric and particle size distribution, supported by photoluminescent (PL) and Fourier transform infrared spectroscopy (FT–IR) of BCFM, were conducted to reveal the BCFM characteristic. The gravimetric analysis showed that the application of the secondary plasma tar cracking unit highly reduced the tar concentration. Similarly, the average particle size also decreased significantly. The peak emission spectra of the suspended BCFM particle under the plasma cracking treatment shifted from around 500 nm to around 400 nm. The significant changes in the BCFM functional group occurred due to the successful cracking process. It was concluded that the byproduct received from the plasma cracking process resulted in very low tar content and was revealed to be a carbon functionalized material with a very small size (16.2 nm) and stable suspension.

Heavy tar evolution characteristics during advanced sludge pyrolysis and biomass gasification integrated process

Sludge pyrolysis and biomass gasification integrated process (SPBG) is an attractive route for the comprehensive utilization of the two materials but more tar is produced in this process compared to traditional biomass steam gasification. Nitrogen-containing compounds in the tar bring threatens to the environment and heavy components in the tar contributes to undesired coke formation. In current study, the evolution of heavy tar, especially the nitrogen-rich components, during SPBG is revealed for the first time. It was found that heavy components were mainly distributed in the mass range of 150–450 Da, where aromatics consisted of carbon, hydrogen and nitrogen atoms were the most abundant. Deamination (NH3) and the combination of quinoline accompanied with the generation of the heavy components. Organics from sludge could react with biomass to form heavier oxygen-containing molecules. Meanwhile, steam from sludge promoted heavy components to crack by tar reforming reactions and consumed radicals in bio-char to inhibit the catalytic cracking of tar. Under the combination of above reactions, more heavy molecules were generated at low sludge volatile/biomass ratio and the aromatic content in the heavy tar decreased at high sludge volatile/biomass ratio.

A highly efficient bimetallic/biochar composite with enhanced catalytic reforming of pyrolysis tar: Performance and mechanism

In this study, a highly efficient bimetallic Ni-Fe/char composite catalyst has been synthesized successfully for catalytic cracking of pyrolysis tar and displays excellent catalytic cracking performance with tar conversion efficiency of 95.6 % (35.2 % of H2 yield). The results showed that at the steam/carbon ratio, the reaction temperature and gas residence time of 1.0, 800 °C and 0.5 s respectively, the bimetallic char-supported catalysts showed outstanding catalytic performance compared with traditional catalyst, in which the N6F6/C exhibited the best activity under the same conditions. The catalytic mechanism of NiFe based catalysts can be attributed to the formation of a NiFe alloy. Furthermore, the synergy of Ni and Fe contributed to greater activity for toluene cracking and enhancement of fuel-gas yield. Bimetallic NiFe alloy catalysts have a promising potential for application as highly efficient catalysts for tar removal and reutilization via catalytic cracking.

Hydrogen-rich gas production from disposable COVID-19 mask by steam gasification

Globally, the demand for masks has increased due to the COVID-19 pandemic, resulting in 490,201 tons of waste masks disposed of per month. Since masks are used in places with a high risk of virus infection, waste masks retain the risk of virus contamination. In this study, a 1 kg/h lab-scale (diameter: 0.114 m, height: 1 m) bubbling fluidized bed gasifier was used for steam gasification (temperature: 800 °C, steam/carbon (S/C) ratio: 1.5) of waste masks. The use of a downstream reactor with activated carbon (AC) for tar cracking and the enhancement of hydrogen production was examined. Steam gasification with AC produces syngas with H2, CO, CH4, and CO2 content of 38.89, 6.40, 21.69, and 7.34 vol%, respectively. The lower heating value of the product gas was 29.66 MJ/Nm3 and the cold gas efficiency was 74.55 %. This study showed that steam gasification can be used for the utilization of waste masks and the production of hydrogen-rich gas for further applications.