Indian Chemical Engineer最新文献_第10页

Shape factor for the relay feedback autotuning 继电器反馈自动调谐的形状因子

IF 1.5

Indian Chemical Engineer Pub Date : 2020-12-01 DOI: 10.1080/00194506.2020.1846630

Friedrich Y. Lee, M. Baldea, T. Edgar, Jietae Lee

{"title":"Shape factor for the relay feedback autotuning","authors":"Friedrich Y. Lee, M. Baldea, T. Edgar, Jietae Lee","doi":"10.1080/00194506.2020.1846630","DOIUrl":"https://doi.org/10.1080/00194506.2020.1846630","url":null,"abstract":"ABSTRACT\u0000 Relay in the feedback loop produces a stable oscillation whose cyclic steady state response contains process information of ultimate gain and ultimate period. By measuring these process data and Ziegler-Nichols type tuning rules, PID controllers can be designed. Due to its simplicity and performances, this earlier relay feedback method becomes one of the standard methods for autotuning of PID controllers. Later the first-order plus time delay (FOPTD) models are used for the relay feedback method with additional process data such as the process steady-state gain, improving autotuning performances. Like other FOPTD model-based methods, this FOPTD model-based relay feedback method is very popular in the field. However, for some high-order processes, the FOPTD model-based method shows oscillatory closed-loop responses that are not acceptable. For such processes, the critically damped second-order plus time delay (C2PTD) identifiable with the same three process information of steady state gain, ultimate gain and ultimate period can be used. Unfortunately, the C2PTD model-based relay feedback method cannot cover the whole range of processes. One solution is the selective use of FOPTD and C2PTD models. For this purpose of selection, a shape factor that uses the process measurement of average residence time is proposed here. GRAPHICAL ABSTRACT","PeriodicalId":13430,"journal":{"name":"Indian Chemical Engineer","volume":"64 1","pages":"27 - 41"},"PeriodicalIF":1.5,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/00194506.2020.1846630","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46978460","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Studies on power plant algae: assessment of growth kinetics and bio-char production from slow pyrolysis process 电厂藻类的研究:生长动力学的评估和慢热解过程的生物炭生产

IF 1.5

Indian Chemical Engineer Pub Date : 2020-11-30 DOI: 10.1080/00194506.2020.1845987

S. Das, K. Nath, V. Gupta, R. Chowdhury

{"title":"Studies on power plant algae: assessment of growth kinetics and bio-char production from slow pyrolysis process","authors":"S. Das, K. Nath, V. Gupta, R. Chowdhury","doi":"10.1080/00194506.2020.1845987","DOIUrl":"https://doi.org/10.1080/00194506.2020.1845987","url":null,"abstract":"ABSTRACT\u0000 Algae can simultaneously be used for bio-capture of CO2, generation of biofuels and biochar. In the present study, the kinetics of autotrophic growth of a power-plant blue–green algae Leptolyngbya subtilis JUCHE1 have been determined along with the assessment of capability of lipid production. The gas phase concentrations of CO2 have been varied in the range of 5–20% (v/v). Illuminated 250 mL Erlenmeyer flasks have been used as small scale photobioreactors. The temperature and light intensity have been maintained at 37oC and 2.5 kLux respectively. Substrate inhibition has been observed beyond 15% CO2 concentration in gas phase. Haldane model explains the growth kinetics. The values of growth kinetic parameters namely μmax, Ks, KI have been determined to be 0.6064d−1, 0.0165 and 1.7429 g/L, respectively. The algal oil has been extracted using a mixture of chloroform and methanol 2:1(v/v) and the dry algal biomass has been pyrolysed in an isothermal semi-batch reactor in the temperature range of 300oC–700°C. The lipid content varies in the range of 4.0–12.5% (wt./wt.) and is strongly influenced by the concentration of CO2 and the culture period. The yield of bio-char increases from 29 to 44% with the decrease of pyrolysis temperature from 700°C to 300°C. GRAPHICAL ABSTRACT","PeriodicalId":13430,"journal":{"name":"Indian Chemical Engineer","volume":"63 1","pages":"129 - 138"},"PeriodicalIF":1.5,"publicationDate":"2020-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/00194506.2020.1845987","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48363372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamic analysis and decentralised control system design for diphenyl carbonate reactive distillation process 碳酸二苯酯反应精馏过程动态分析及分散控制系统设计

IF 1.5

Indian Chemical Engineer Pub Date : 2020-11-24 DOI: 10.1080/00194506.2020.1847697

Shirish Prakash Bandsode, C. Besta

引用次数: 0

Biofuel generation from high-fat effluent in a biofilm reactor with backwash 反冲洗生物膜反应器中高脂肪污水的生物燃料生成

IF 1.5

Indian Chemical Engineer Pub Date : 2020-11-24 DOI: 10.1080/00194506.2020.1847698

Chandrima Roy, R. Chowdhury, P. Bhattacharya

{"title":"Biofuel generation from high-fat effluent in a biofilm reactor with backwash","authors":"Chandrima Roy, R. Chowdhury, P. Bhattacharya","doi":"10.1080/00194506.2020.1847698","DOIUrl":"https://doi.org/10.1080/00194506.2020.1847698","url":null,"abstract":"ABSTRACT The performance of an up-flow 0.5 m high and 0.076 m diameter fixed-film bioreactor treating lipid-rich synthetic wastewater has been investigated under the present study. The initial porosity of the filter bed using immobilised microorganisms were on the support matrices has been measured to be 0.67. Excess biomass accumulation on the support leads to an increase in biofilm thickness with time. The filter bed has been regenerated by backwashing after the stipulated time to regain its efficiency in terms of COD removal through the revival of the contact surface. A mathematical model has been developed to predict the loss of contact area and decrease in the porosity of bed with operation time. The backwashing time has been correlated to the inlet concentration of substrate. Methanogens like Methanococcus sp. and Methanosarcina sp. are detected in the mixed anaerobic consortia and favourable growth condition for methanogens in the reactor leads to a maximum cumulative methane production at the exit of the reactor estimated to be 785 ml CH4 (STP)/(g VSS added). The originality of the present research lies in investigating erucic acid-rich wastewater in a bioreactor with backwash and proposing an integration of this bioconversion with syngas-based 2G-Biorefinery. GRAPHICAL ABSTRACT","PeriodicalId":13430,"journal":{"name":"Indian Chemical Engineer","volume":"63 1","pages":"119 - 128"},"PeriodicalIF":1.5,"publicationDate":"2020-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/00194506.2020.1847698","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45697309","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Online measurement of dissolved oxygen in shake flask to elucidate its role on caffeine degradation by Pseudomonas sp. 在线测定摇瓶中溶解氧对假单胞菌降解咖啡因的作用。

IF 1.5

Indian Chemical Engineer Pub Date : 2020-11-19 DOI: 10.1080/00194506.2020.1847699

M. Shanmugam, Sundarajan Sriman, S. Gummadi

{"title":"Online measurement of dissolved oxygen in shake flask to elucidate its role on caffeine degradation by Pseudomonas sp.","authors":"M. Shanmugam, Sundarajan Sriman, S. Gummadi","doi":"10.1080/00194506.2020.1847699","DOIUrl":"https://doi.org/10.1080/00194506.2020.1847699","url":null,"abstract":"ABSTRACT Caffeine is a plant alkaloid present in the large ratio over other emerging pollutants and it causes serious health effects on overdosage. Microbial degradation of caffeine produces metabolites that can be used as a multi-functional drug. In this study, the effect of dissolved oxygen (DO) on microbial growth and degradation of caffeine in minimal media, synthetic coffee effluent treatment, and theobromine production was studied in presens flask – SFR vario installed in an orbital shaker. Induction studies showed Pseudomonas sp. requires oxygen for caffeine degradation. Theobromine production with induced cells of Pseudomonas sp. showed maximum accumulation of 35 mg/l with a higher molar yield of 80% at higher DO of 60% saturation when compared to experiments done with a lower oxygen level of 25% and 20% saturation. Effluent treatment using induced cells was the fastest caffeine degradation ever reported at 0.055 g/l.h with 0.4 g/l of induced cell concentration without affecting the polyphenol content significantly. Higher DO in the medium is required for efficient conversion of caffeine to theobromine which is in agreement that the reaction is oxidative demethylation. Online monitoring of DO is very important in shake flask studies which will be useful in scaling up processes.","PeriodicalId":13430,"journal":{"name":"Indian Chemical Engineer","volume":"64 1","pages":"162 - 170"},"PeriodicalIF":1.5,"publicationDate":"2020-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/00194506.2020.1847699","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46369928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Studies in synthesis and modification of PES membrane and its application for removal of reactive black 5 dye PES膜的合成、改性及其在活性黑5染料去除中的应用研究

IF 1.5

Indian Chemical Engineer Pub Date : 2020-10-26 DOI: 10.1080/00194506.2020.1822761

H. Patil, V. Shanmugam, K. Marathe

{"title":"Studies in synthesis and modification of PES membrane and its application for removal of reactive black 5 dye","authors":"H. Patil, V. Shanmugam, K. Marathe","doi":"10.1080/00194506.2020.1822761","DOIUrl":"https://doi.org/10.1080/00194506.2020.1822761","url":null,"abstract":"ABSTRACT In this study, polyethersulfone (PES)/iron oxide (Fe2O3) mixed matrix membranes have been prepared using the phase inversion technique. Initially, iron oxide nanoparticles were synthesised with an average size <80 nm and its characteristics were studied. Various PES/ Fe2O3 membranes were fabricated keeping PES composition (16) wt% constant and Fe2O3 loading (0–1.5) wt%. Surface morphology, cross-section morphology, composition characteristics, contact angle along with water flux, solute rejection and molecular weight cut-off (MWCO) of the membranes were studied. Numerous analytical instruments like Zeta particle size analyzer, X-ray diffraction (XRD), SEM, XPS, and goniometer were used in the study. Experimental results showed that the overall characteristics of the membrane were highly enhanced when the membrane prepared with 16 wt% PES, 5 wt% polyethylene glycol (PEG) doped with 1 wt% Fe2O3. Compared to the neat PES membranes, 1 wt% Fe2O3 blend membranes showed higher water flux of 80.94*10−7 m3/m2.s at trans membrane pressure of 200 kPa. Moreover, the membrane was subject to synthetic wastewater containing reactive black 5, which resulted in high permeate flux of 56.1*10−7 m3/m2.s with 98% rejection at pH 3. GRAPHICAL ABSTRACT","PeriodicalId":13430,"journal":{"name":"Indian Chemical Engineer","volume":"64 1","pages":"111 - 120"},"PeriodicalIF":1.5,"publicationDate":"2020-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/00194506.2020.1822761","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43558853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Cellulose from lignocellulose kitchen waste and its application for energy and environment: bioethanol production and dye removal 木质纤维素餐厨废弃物中的纤维素及其在能源和环境中的应用：生物乙醇生产和染料去除

IF 1.5

Indian Chemical Engineer Pub Date : 2020-10-21 DOI: 10.1080/00194506.2020.1833765

P. Ganguly, A. Khan, P. Das, A. Bhowal

{"title":"Cellulose from lignocellulose kitchen waste and its application for energy and environment: bioethanol production and dye removal","authors":"P. Ganguly, A. Khan, P. Das, A. Bhowal","doi":"10.1080/00194506.2020.1833765","DOIUrl":"https://doi.org/10.1080/00194506.2020.1833765","url":null,"abstract":"ABSTRACT Every year about millions of tons of raw feedstocks having a potential value in solid waste is confined into landfills. One of the present challenges for ecological engineering is to develop economically practical and cost-effective technologies to treat waste into value-added by-products. One of the common types of renewable fuel is Bioethanol. The aim of this research was the utilisation of kitchen wastes (onion peels and tea waste) for bioethanol production and wastewater treatment. Hydrothermal (alkali) followed by acidic pre-treatment was reported best technique for both the feedstocks. Pre-treated wastes were further, hydrolysed by Aspergillus sp. for reducing sugar production. The maximum reducing sugar yield reported was 9.50 mg/ml from the onion peels and 4.88 mg/ml from tea waste. The anaerobic condition was maintained for the fermentation process by utilising Saccharomyces cerevisiae. Bioethanol production was maximum from onion peels 0.95, and 0.66 g/g was achieved by utilising tea waste. The other environmental concern today is to evolve an effectual treatment methodology for the reuse of the lignocellulosic substrate. In this context, biomass waste was treated and transform to value-added products such as cellulose and lignin, utilised for crystal violet dye removal. The maximum amount of dye removed was 96% using cellulose. GRAPHICAL ABSTRACT","PeriodicalId":13430,"journal":{"name":"Indian Chemical Engineer","volume":"63 1","pages":"161 - 171"},"PeriodicalIF":1.5,"publicationDate":"2020-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/00194506.2020.1833765","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43219417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11

Energy and environmental performance of a near-zero-effluent rice straw to butanol production plant 近零排放稻草丁醇生产装置的能源和环境性能

IF 1.5

Indian Chemical Engineer Pub Date : 2020-10-13 DOI: 10.1080/00194506.2020.1831406

S. Dutta, Shiladitya Ghosh, Dinabandhu Manna, R. Chowdhury

{"title":"Energy and environmental performance of a near-zero-effluent rice straw to butanol production plant","authors":"S. Dutta, Shiladitya Ghosh, Dinabandhu Manna, R. Chowdhury","doi":"10.1080/00194506.2020.1831406","DOIUrl":"https://doi.org/10.1080/00194506.2020.1831406","url":null,"abstract":"ABSTRACT Present article focuses on the energy and environmental performance of a rice straw (RS) biorefinery producing bio-butanol as the main product, ethanol and acetone as the by-products and combined heat and power. The analysis highlights the strategic usage of RS-derived glucose and xylose as primary substrates for biobutanol production. The principle of utilization of total carbon and the fulfillment of the criterion of zero-waste management has been followed along with the generation of in-house energy to offset the energy expenditure and reduce CO2 emission. The overall yields of butanol, ethanol and acetone are 28.53kg, 0.84kg and 6.61kg respectively from 100kg RS. By performing energy analysis in this system for 100kg RS, energy content of lignin, extractives and biogas introduced to CHP have been estimated to be 674.78MJ. Net energy input to the steam turbine of the CHP is 539.83MJ and the outputs of electricity and heat energy are 130MJ and 194MJ, respectively. While the energy efficiency of CHP is 87%, the overall efficiency of the biorefinery through generation of alcohol/solvents and recovery of waste energy in the CHP is 68.2%. Due to the substitution of gasoline by butanol and through electricity generation, reduction of CO2 emission by 36.14kg is possible. GRAPHICAL ABSTRACT","PeriodicalId":13430,"journal":{"name":"Indian Chemical Engineer","volume":"63 1","pages":"139 - 151"},"PeriodicalIF":1.5,"publicationDate":"2020-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/00194506.2020.1831406","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45066088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Investigation and optimisation of the extraction of carvone and limonene from the Iranian Mentha spicata through the ultrasound-assisted extraction method 超声辅助提取伊朗薄荷香芹酮和柠檬烯的工艺研究与优化

IF 1.5

Indian Chemical Engineer Pub Date : 2020-10-13 DOI: 10.1080/00194506.2020.1831407

Sepideh Mansoori, H. Bahmanyar, Elnaz Jafari Ozumchelouei, Iman Najafipour

引用次数: 6

Structural and composition enhancement of Indian Kachchh kaolin clay: characterisation and application as low-cost catalyst 印度Kachchh高岭土的结构和组成增强:表征及其作为低成本催化剂的应用

IF 1.5

Indian Chemical Engineer Pub Date : 2020-10-12 DOI: 10.1080/00194506.2020.1828191

D. Gandhi, R. Bandyopadhyay, S. Parikh

{"title":"Structural and composition enhancement of Indian Kachchh kaolin clay: characterisation and application as low-cost catalyst","authors":"D. Gandhi, R. Bandyopadhyay, S. Parikh","doi":"10.1080/00194506.2020.1828191","DOIUrl":"https://doi.org/10.1080/00194506.2020.1828191","url":null,"abstract":"ABSTRACT The effect of acid treatment on kaolin clay from the Kachchh region of Gujarat, India, was explored to prepare a low-cost (−$0.6/kg) catalyst. The clay was treated with 10 M H2SO4 which increased the Si/Al ratio from 1.3 to 2.4, surface area from 10.322 to 54.193 m2/g and pore volume from 0.041 to 0.152 cm3/g. The XRF analysis indicated that the metal oxides in treated clay decreased with increasing acid strength; consequently increasing the SiO2 content. SEM micrographs displayed gradual disaggregation and decrease in the size of clay structure with an increase in acid strength. TG-DTA study confirmed the removal of structural water. FTIR and X-ray diffraction analysis indicated metal removal creating a large degree of structural disorder resulting in reduced crystallinity and leading towards the amorphous phase. BET study confirmed the formation of additional mesopores. The acid-treated clay was applied as a catalyst for the esterification of succinic acid (SA) with ethanol. The conversion of SA increased from 27% to 56% revealing higher activity and selectivity in terms of higher yield (96%) of valuable diester. The catalyst was reused up to three cycles with a slight loss of catalytic activity. GRAPHICAL ABSTRACT","PeriodicalId":13430,"journal":{"name":"Indian Chemical Engineer","volume":"64 1","pages":"121 - 131"},"PeriodicalIF":1.5,"publicationDate":"2020-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/00194506.2020.1828191","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45271775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4