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RISS 인기검색어
- 검색키워드
- 저자 : Abdul Waheed Bhutto (검색결과 3 건)
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Parametric study of pyrolysis and steam gasification of rice straw in presence of K2CO3
Humair Ahmed Baloch,Abdul Waheed Bhutto,Tianhua Yang,Haipeng Sun,Jie Li,Sabzoi Nizamuddin,Rundong Li,Zhanguo Kou,Yang Sun 한국화학공학회 2016 Korean Journal of Chemical Engineering Vol.33 No.9
A parametric study of pyrolysis and steam gasification of rice straw (RS) was performed to investigate the effect of the presence of K2CO3 on the behavior of gas evolution, gas component distribution, pyrolysis/gasification reactivity, the quality and volume of synthetic gas. During pyrolysis, with the increase in K2CO3 content in RS (i) the instantaneous CO2 concentration was increased while CO concentration was relatively stable; (ii) the yield of CO2 and H2 increased on the cost of CH4. During steam gasification of RS, with the increase in K2CO3 content in RS (i) the instantaneous concentration of CO2 and H2 increased while instantaneous concentration of CO and CH4 decreased; (ii) the yield of CO2 and H2 production and total yield increased; and (iii) yield of CO and CH4 production followed the order: 9% K2CO3 RS<6% K2CO3 RS<raw RS<3% K2CO3 RS<water-leached RS. Water-leached RS showed the highest pyrolysis reactivity, while stream gasification reactivity was proportional to K2CO3 content in RS. The results of this study reveal that the presence of K2CO3 during pyrolysis and steam gasification of RS effectively improves production of H2 rich gas.
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Hydrothermal carbonization of oil palm shell
Sabzoi Nizamuddin,Natesan Subramanian Jayakumar,Jaya Narayan Sahu,Poobalan Ganesan,Abdul Waheed Bhutto,Nabisab Mujawar Mubarak 한국화학공학회 2015 Korean Journal of Chemical Engineering Vol.32 No.9
Palm shell is one of the most plentiful wastes of the palm oil mill industry. This study identifies the capability of hydrothermal carbonization process (HTC) to convert palm shell into high energy hydrochar. The influence of reaction time and reaction temperature of the HTC process was investigated. The process parameters selected were temperature 200 oC to 240 oC, time 10 to 60min, and water to biomass ratio was fixed at 10 : 1 by weight %. Fourier transform infrared (FTIR), elemental, proximate, Burner Emmett and Teller (BET), thermo-gravimetric (TGA) analyses were performed to characterize the product and the feed. The heating value (HHV) was increased from 12.24 MJ/ kg (raw palm shell) to 22.11 MJ/kg (hydrochar produced at 240 oC and 60 min). The hydrochar yield exhibited a higher degree inverse proportionality with temperature and reaction time. Elemental analysis revealed an increase in carbon percentage and a proportional decrease in hydrogen and oxygen contents which caused higher value of HHV. The dehydration and decarboxylation reactions take place at higher temperatures during HTC resulting in the increase of carbon and decrease in oxygen values of hydrochar. The FESEM results reveal that the structure of raw palm shell was decomposed by HTC process. The pores on the surface of hydrochar increased as compared to the raw palm shell.
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Bhatti, Inamullah,Qureshi, Khadija,Kamarudin, Khairul Sozana Nor,Bazmi, Aqeel Ahmed,Bhutto, Abdul Waheed,Ahmad, Faizan,Lee, Moonyong Elsevier 2016 Journal of natural gas science and engineering Vol.34 No.-
<P><B>Abstract</B></P> <P>This paper presents an innovative method to prepare a stable emulsion liquid membrane (ELM) for high CO<SUB>2</SUB> absorption in a natural gas feed. This new method achieved high throughput at low power consumption. The ELM prepared using this new method was characterized by determining the effects of the concentration of the ELM constituents, emulsification time, and speed on the emulsion droplet size (EDS) and stability. This was followed by a parametric study of the process parameters for CO<SUB>2</SUB> separation from natural gas in a rotating disk contactor (RDC)-based setup to evaluate the performance of a stable ELM. The results suggest that the retention time of the stable ELM in a RDC increases with increasing amount of absorbed CO<SUB>2</SUB>. The results support the fundamental development of the ELM process to achieve a high overall separation efficiency of CO<SUB>2</SUB> removal from natural gas with a relatively small contact time. This is the first parametric study of CO<SUB>2</SUB> absorption from a gas stream in ELM using a RDC as the contracting equipment. The results of the parametric study suggested that the factors of time, TEA concentration and RDC speed have significant effect on the CO<SUB>2</SUB> absorption from natural gas feed. It was identified that 4% TEA in ELM, 30 min operational time and 700 rpm speed of modified RDC system is suitable for maximum CO<SUB>2</SUB> absorption from gas mixture of CO<SUB>2</SUB>/CH<SUB>4</SUB>. Furthermore, the study suggested that the ELM containing 4% TEA can absorb 5.6 kmol/m<SUP>3</SUP> CO<SUB>2</SUB>.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Preparation and characterization of stable emulsion liquid membrane (ELM). </LI> <LI> Parametric study of CO<SUB>2</SUB> absorption from natural gas in rotating disk contactor (RDC). </LI> <LI> Retention time of the stable ELM increases with increasing amount of absorbed CO<SUB>2</SUB>. </LI> <LI> Fundamental development of ELM process for high overall separation efficiency. </LI> </UL> </P>
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